WO2024030010A1 - 나노카테난 구조체 및 나노카테난 구조체를 포함하는 나노머신 - Google Patents
나노카테난 구조체 및 나노카테난 구조체를 포함하는 나노머신 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y15/00—Nanotechnology for interacting, sensing or actuating, e.g. quantum dots as markers in protein assays or molecular motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82B—NANOSTRUCTURES FORMED BY MANIPULATION OF INDIVIDUAL ATOMS, MOLECULES, OR LIMITED COLLECTIONS OF ATOMS OR MOLECULES AS DISCRETE UNITS; MANUFACTURE OR TREATMENT THEREOF
- B82B3/00—Manufacture or treatment of nanostructures by manipulation of individual atoms or molecules, or limited collections of atoms or molecules as discrete units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- G—PHYSICS
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
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Definitions
- the present invention relates to nanocatenane structures and nanomachines containing nanocatenane structures.
- plasmonic nanostructures Manipulation of light-matter interactions based on plasmonic nanostructures has attracted considerable attention over the past two decades. Beyond controlling the optical properties of individual nanoparticles, numerous assembled geometries of plasmonic nanostructures have been proposed to achieve systems with unique properties such as plasmonic coupling, optical magnetism, and chirality. Because these unique optical responses result from their specific geometries, molecular similarities that share similar optical properties often provide insight into the design of plasmonic nanostructures. For example, the artificial magnetism of plasmonic nanodisc heptamer systems is reminiscent of the ring current generated by delocalized ⁇ -electrons of aromatic molecules in response to an external magnetic field. Additionally, the axial chiral geometry of the binaphthyl derivative and the twisted plasmonic nanorod dimer has a typical optical fiber response to circularly polarized light.
- the purpose of the present invention is to provide a method for producing a nanocatenane structure with high selectivity.
- the present invention aims to provide a nanocatenane structure that exhibits anisotropy and a novel nanomachine using the same.
- the present invention includes at least two chained ring structures, wherein the ring structure includes a core and a shell covering the core, and the chained ring structures are chemically bonded at the joint region, A nanocatenane structure is provided.
- a nanocatenane structure wherein the core includes a metal or semiconductor material.
- At least a portion of the inner surface of the ring of the ring structure is modified with at least one of DNA, protein, and ligand, and the junction region of the concatenated ring structure is modified with at least one of the DNA, protein, and ligand.
- a nanocatenane structure is provided in which a cross-linked molecule produced by combining is provided.
- a nanocatenane structure in which the ring outer surface of the ring structure has a structure modified with a compound containing a thiol group.
- a nanocatenane structure in which the ring structures have a chained structure with the ring structures spaced apart from each other at a distance of 20 nm to 100 nm.
- a nanocatenane structure in which the ring structures are chained together in a tilted form.
- a first step of preparing a core A second step of preparing a modified core by modifying the core with at least one of DNA, protein, and ligand; A third step of reacting and chaining at least two of the modified cores; and a fourth step of growing a metal or semiconductor on the chained core to close the defective region of the modified core.
- the first step includes a 1-1 step of preparing a nanoplate; Step 1-2 of growing the core along the edge of the nanoplate; And a method for synthesizing a nanocatenane structure is provided, including steps 1-3 of preparing the core by etching the nanoplate.
- a method for synthesizing a nanocatenane structure in which the surface of the core is modified with a compound containing a thiol group between the first and second steps and the first and third steps.
- the third step includes forming a chemical bond by reacting at least one of DNA, protein, and ligand provided on the outer surface of the ring of the modified core, nanocatenane structure. Synthetic methods are provided.
- the present invention includes a nanocatenane structure, wherein the nanocatenane structure converts linear force into rotational mechanical motion by light-induced thermal actuation, and the nanocatenane structure includes at least two chained structures.
- a nanomachine comprising a ring structure, wherein the ring structure includes a core and a shell covering the core, and the chained ring structures are chemically bonded at a joint region.
- a nanomachine where the nanocatenane structure controls circular dichroism (CD) of the nanostructure.
- CD circular dichroism
- a nanocatenane structure having an anisotropic catenane structure can be manufactured.
- a catenane nanocatenane structure can be synthesized with high selectivity.
- Figure 1 is a flow chart schematically showing a method for synthesizing a nanocatenane structure according to an embodiment of the present invention.
- Figure 2 shows the results of analyzing the characteristics of a precursor for synthesizing a nanocatenane structure according to an embodiment of the present invention.
- FIG. 3 shows a selective modification of a Pt core (Pt split nanoring; PtSNR) according to an embodiment of the present invention.
- Figure 4 is a characterization result of a nanocatenane structure according to an embodiment of the present invention.
- Figure 5 is an electron microscope observation image of a nanocatenane nanocatenane structure having various thicknesses according to an embodiment of the present invention.
- Figure 6 is an SEM image of a nanocatenane structure according to an embodiment of the present invention.
- Figure 7 shows the results of SEM and dark field image analysis according to an embodiment of the present invention.
- Figure 8 shows the results of analyzing the correlation between the optical response and structural form of the nanocatenane structure according to an embodiment of the present invention.
- Figure 9 shows the gap distance analysis results according to LSPR of the nanocatenane structure according to an embodiment of the present invention.
- Figure 10 shows the results of analyzing the anisotropy of the nanocatenane nanocatenane structure according to an embodiment of the present invention.
- Figure 11 shows the results of asymmetric optical response analysis under circularly polarized light of the nanocatenane nanocatenane structure according to an embodiment of the present invention.
- Figure 12 shows the results of analysis of thermal operation by light of a mechanically coupled plasmonic nanomachine.
- Figure 13 shows the results of light-induced thermal operation analysis of the PNIPAM modified (M)-nanocatenanenanocatenane structure.
- first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.
- a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention.
- Singular expressions include plural expressions unless the context clearly dictates otherwise.
- the direction of formation is not limited to the upward direction and includes formation in the side or downward direction.
- a part of a layer, membrane, region, plate, etc. is said to be “beneath” another part, this includes not only cases where it is “immediately below” another part, but also cases where there is another part in between.
- 'upper surface' and 'lower surface' are used as relative concepts to explain the technical idea of the present invention in an easy to understand manner. Therefore, 'top' and 'bottom' do not refer to a specific direction, location, or component and are interchangeable with each other.
- 'upper surface' may be interpreted as 'lower surface' and 'lower surface' may be interpreted as 'upper surface'. Therefore, the 'top surface' can be expressed as 'first' and the 'bottom surface' can be expressed as 'second', or the 'bottom surface' can be expressed as 'first' and the 'top surface' can be expressed as 'second'.
- 'upper surface' and 'lower surface' are not used interchangeably.
- the present invention relates to a nanocatenane structure having a mechanically interlocked molecular structure, a catenane structure, and its synthesis method and application.
- the nanocatenane structure of the present invention can be synthesized from a triangular metal nanoplasmonic structure.
- a nanocatenane structure composed of two rings in terms of D2d spatial symmetry can cause one nanoring to become desymmetrical in terms of D2 symmetry compared to the other nanoring, thereby causing high g-factor chiroptical responses.
- Nanocatenane structures with these characteristics can be applied as nanomachines such as nanoactuators.
- the light-induced thermal actuation of plasmonic nanomachines converts linear force into rotational mechanical motion, resulting in circular dichroism of plasmonic nanostructures. Circular dichorism (CD) can be controlled.
- the nanocatenane structure according to the present invention includes at least two chained ring structures, the ring structure includes a core and a shell covering the core, and the chained ring structures are chemically bonded at the junction region. .
- the ring structure refers to a ring, and may have a ring shape such as a circle, oval, square, or diamond on a plane.
- the shape of the ring structure is not limited as long as it is a closed loop.
- the two ring structures provided in the catenane structure may have the same shape or different shapes.
- the shape and size of the two ring structures may be the same.
- one ring may have a circular shape and one ring may have an oval shape, and the sizes may be different.
- the specific form of the ring structure may vary depending on the purpose of the nanocatenane structure, the electrical and optical properties to be secured, etc.
- the ring structure may include a core and a shell covering the core.
- the core may be provided corresponding to the shape of the ring structure.
- the core may be provided in the form of a split ring.
- a split ring refers to a ring-shaped ring with an open loop structure in which part of the ring is missing. Since the split ring has an open loop structure, the two split rings can be engaged with each other in an interlocked structure.
- the core of the ring structure may include at least one material selected from the group consisting of metal or semiconductor materials such as gold (Au), silver (Ag), palladium (Pd), and platinum (Pt).
- the core may use a material that provides a growth site for synthesizing the Au shell on the surface.
- the core may use a material that has an etching reactivity different from the material constituting the nanoplate. This is to selectively etch only the nanoplate among the nanoplate and core when preparing the core by synthesizing the core on the edge of the nanoplate and etching the nanoplate during the core preparation process, as described later.
- the nanoplate may be made of gold (Au)
- the core may be made of a material that has an etch reactivity different from that of gold (Au).
- a shell covering the core of the ring structure may be provided along the core surface.
- the shell is provided in a form that specifically covers the missing areas of the core. Therefore, when a shell is provided, the ring structure exhibits a closed loop structure with no missing regions. Accordingly, at least a portion of the shell can be provided in a region where there is no core, and the shell covers the core, thereby forming a chained structure of the ring structure.
- the shell may contain metal or semiconductor materials such as gold (Au), silver (Ag), palladium (Pd), and platinum (Pt).
- the core and shell may be made of the same material or may be made of different materials.
- the chained ring structures may be chemically bonded to each other in adjacent bonding regions.
- the junction area of the ring structures may refer to the area where two ring structures are closest, rather than the shell provided in each ring structure physically contacting each other.
- Ring structures adjacent to each other in the above-described junction region may be chemically bonded to each other by cross-linking molecules. Specifically, at least some regions of the ring structure may be modified with a carboxyl compound and an amine compound, and the two ring structures may be chemically connected by combining the carboxyl compound and the amine compound on two adjacent cores.
- the inner ring surface and outer ring surface of the core can be modified, respectively.
- the outer surface of the ring can be modified with a material that is less reactive with the cross-linking molecule.
- the outer surface of the ring can be modified with a compound containing a thiol group. They have low reactivity with carboxyl compounds, amine compounds or other thiol groups. Therefore, when these substances are introduced to the outer surface of the ring for modification in the subsequent process, the outer surface of the ring is bound to DNA, proteins, and other chemical ligands provided on the inside of the ring, or the outer surface of the ring is bonded to the outer surface of the ring by a carboxyl compound or amine compound. There is no risk of modification.
- the outer surface of the ring modified with a compound containing a thiol group has no room to participate in the chain structure of the core. Therefore, the chain structure can be stably completed by chemically bonding only the inner surfaces of the ring to each other.
- the outer surface of the ring can be modified with polyethylene glycol methyl ether thiol (PEG methyl ether thiol).
- the inner surface of the ring can be modified with DNA, proteins, or other chemical ligands.
- the inner surface of the ring may be modified with a carboxyl compound or an amine compound.
- the inner surface of the core included in the first ring structure is modified with a carboxyl group
- the inner surface of the ring of the core included in the second ring structure is modified with an amine group.
- the carboxyl compound When a carboxyl compound is provided on the inner surface of the ring, the carboxyl compound may be a linear compound containing a carboxyl group at one end and a thiol group at the other end. At this time, the thiol group is bonded to the core, and the carboxyl group can bond to an amine group provided to another core in the bonding region during the subsequent chaining process.
- the carboxyl compound may also be a linear polymer compound, and by controlling the chain length of the carboxyl compound, when the ring structures are chained, the gap between the two ring structures in the junction region can be adjusted.
- the amine compound when an amine compound is provided on the inner surface of the ring, the amine compound may be a linear compound containing an amine group at one end and a thiol group at the other end. At this time, the thiol group can bond to the core, and the amine group can bond with the carboxyl group provided to the other core in the bonding region during the subsequent chaining process.
- the amine compound may also be a linear polymer compound, and by controlling the chain length of the amine compound, when the ring structures are chained, the gap between the two ring structures in the junction region can be adjusted.
- the ring structures may have a chain structure with a distance of 20 nm to 100 nm from each other.
- the distance (gap) between the ring structures is within the above-mentioned range, there is an advantage in that a chain structure can be synthesized without fusion between the two ring structures during the subsequent shell synthesis process.
- Ring structures can be chained together in a tilted form.
- the twist angle between ring structures may mean the angle formed by the 'center of the ring' of each ring and the plane containing both the 'ring' with respect to the two ring structures.
- the chained nanocatenane structures have anisotropy (chirality).
- thermoresponsive nanomachine by light can be implemented using thermoresponsive PNIPAM (poly(N-isopropylacrylamide)), which mimics the shaking motion of one ring in the catenane structure.
- PNIPAM poly(N-isopropylacrylamide)
- LCST critical solution temperature
- the surface of PNIPAM-modified AuNCat becomes hydrophobic as PNIPAM shrinks.
- Sequentially adjacent nanorings attract each other, increasing the asymmetry angle of AuNCat. This structural transformation results in spectral changes including plasmon scattering and CD.
- the anisotropic nanocatenane structure can convert linear force into rotational mechanical motion by light-induced thermal actuation.
- the nanocatenane structure can be implemented in the form of a nanomachine that controls the circular dichroism (CD) of the nanostructure.
- the method for synthesizing a nanocatenane structure according to the present invention includes a first step of preparing a core; A second step of preparing a modified core by modifying the core with at least one of DNA, protein, and ligand; A third step of reacting and chaining at least two of the modified cores; and a fourth step of growing metal on the concatenated cores to close the defective area of the modified core.
- the first step is to prepare the core.
- the core includes step 1-1 of preparing a nanoplate; Step 1-2 of growing the core along the edge of the nanoplate; And it can be prepared according to a synthesis process including steps 1-3 of preparing the core by etching the nanoplate.
- the nanoplate used in step 1-1 may be a gold nanoplate having a triangular shape on a plane.
- the above-described gold nanoplate is suitable for selectively growing a core at the edge, and is suitable for manufacturing a core that is an open loop-shaped split ring after gold etching.
- the core is grown in a ring shape along the edge of the gold nanoplate.
- the core is selectively grown at the edge of the gold nanoplate, and the core may not be substantially grown on the top and bottom surfaces of the gold nanoplate.
- the core may have a split ring structure in the form of an open loop with some regions missing.
- the gold nanoplate may be etched to leave only the core provided at the edge of the gold nanoplate.
- Gold nanoplates can be etched using a solution that selectively etches gold among the metals that make up the core. Therefore, when the gold nanoplate and core are immersed in the above-mentioned solution, only the gold nanoplate can be selectively etched.
- the surface of the core may be modified with a compound containing a thiol group.
- Compounds containing thiol groups are provided in a form that covers the entire core provided at the gold nanoplate and its edges. At this time, the inner surface of the core ring is not modified with a compound containing a thiol group because it is attached to the gold nanoplate.
- the gold nanoplate is removed and only the outer surface of the core ring is modified with a compound containing a thiol group ('modified core').
- a compound containing a thiol group ('modified core').
- a second step is performed to prepare a modified core by modifying the core with at least one of DNA, protein, and ligand.
- the second step is to modify the core with at least one of DNA, protein, and ligand, and the inner surface of the ring of the core is selectively modified.
- the outer surface of the ring of the core since it is modified with a compound containing a thiol group as described above, it is not modified by at least one of DNA, protein, and ligand in the second step.
- the inner surface of the core can be modified only by carboxyl compounds and/or amine compounds.
- the modified core can be divided into two types: those whose inner surface is modified with a carboxyl compound and those whose inner surface is modified with an amine compound.
- cores modified with different compounds can form a chain structure by complementary binding to the inner surfaces of the modified rings.
- the modified core is reacted and chained.
- the carboxyl-modified core which is modified by a carboxyl compound and contains a carboxyl group
- the amine-modified core which is modified by an amine compound and contains an amine group
- the two cores are connected by chemical bonds.
- Substances that can be used as carboxyl compounds include alkyne compounds, and substances that can be used as amine compounds include azide compounds.
- a metal or semiconductor is grown on the chained cores to close the defective area of the modified core.
- the nanocatenane structure can be completed by reacting a metal precursor (metal ion solution) or semiconductor precursor material with the core for metal or semiconductor growth.
- gold (Au) was used as a metal to synthesize the metal catenane structure.
- Figure 1 is a flow chart schematically showing a method for synthesizing a nanocatenane structure according to an embodiment of the present invention.
- molecules with ring-shaped and crescent-shaped structures are prepared as precursors. These precursors have a coordination platform that can form metal-ligand complexes and come together with copper ions to create entangled conformations. Next, by closing the crescent-shaped molecule, the two molecules are connected by a mechanical bond.
- the cores Pt split nanorings (PtSNRs)
- PtSNRs Pt split nanorings
- Au@Pt nanodisks are synthesized from triangular Au nanoplates, and then Pt is selectively grown in the edge region (see Figure 2).
- the outer surface of the Pt frame is chemically protected by polyethylene glycol (PEG) methyl ether thiol. Subsequent Au etching leads to Pt split nanorings with exposed interior and protected exterior, allowing selective modification of the inner surface of the split nanoring precursor.
- PEG polyethylene glycol
- PEG 2-mercaptoethyl ether acetic acid and PEG 2-mercaptoethyl ether ethyl amine selectively modify the inner surface of the Pt split nanorings.
- approximately 17 nm of carboxylic acid and amine terminated PEG are used to obtain a linker of approximately 35 nm ensuring an appropriate interparticle distance.
- the possibility of selective modification and the ability to protect the external surface of methoxy PEG was confirmed from the chemical linkage between the selectively modified Pt split nanorings and small spherical nanoparticles (see Figure 3).
- Pt split nanorings selectively modified with carboxylic acid and amine groups are connected by forming amide bonds via EDC/sulfo-NHS (EDC; N-(3-Dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride) bonds; , which provides a suitable entangled shape for the chain.
- EDC EDC/sulfo-NHS
- Au growth on the assembled Pt split nanorings can obtain mechanically linked AuNCat from two nanorings by closing the split ring structure.
- the structure of synthesized AuNCat can be confirmed by electron microscopy.
- a scanning electron microscope (SEM) image ( Figure 4a) clearly shows that the two Au nanorings are mechanically coupled to each other. Additionally, using HAADF-STEM electron microscopy at different tilt angles (bd in Figure 4), it was confirmed that the two nanorings of AuNCat did not merge during Au growth.
- the thickness (Minor Diameter) of the synthesized AuNCats can vary from 25.0 ⁇ 3.7 nm to 44.4 ⁇ 4.6 nm depending on the amount of HAuCl 4 added in the Au growth step (see Figure 4 e and Figure 5).
- the major diameter of AuNCats remains relatively constant from 91.2 ⁇ 14.6 nm to 97.6 ⁇ 14.4 nm, because the dimensions of the Pt split nanoring precursor are preferentially determined.
- the final yield of AuNCat was approximately 8% without optimization, which was limited by many factors, including the yield of Pt split nanorings, the efficiency of EDC/sulfo-NHS coupling, and effective particle mixing and collisions (see Figure 6).
- AuNCats have structural anisotropy (chirality). Basically, D2d symmetric AuNCats do not show anisotropy. However, the rocking motion of one nanoring relative to another nanoring causes desymmetry from the D2 group, and the deviation of the desymmetry angle from 0° provides mechanical helical anisotropy. According to the definition of the desymmetrization angle (a in Figure 10), the positive sign of the dihedral angle represents (P)-AuNCat, and the negative sign represents (M)-AuNCat, following the nomenclature of mechanical helicity in catenanes ( Figure 10 represents a) of. Therefore, each AuNCat has its own anisotropy. Therefore, (P)- and (M)-AuNCats exhibit different optical responses under circularly polarized light, and the resulting CD of the scattering spectrum can be measured according to the dark field illumination settings (b in Figure 10).
- the g factor of (P)- and (M)-AuNCats can reach up to 0.3, which is a very large g factor value compared to other single or assembled plasmonic nanostructures, which have g factors of around 0.14–0.2.
- the noticeably high g-factor appears to result from the proximity between the centers of the two oscillatory dipole modes of each nanoring, which strongly influence each other and lead to large differences in the response for LCP and RCP.
- PNIPAM thermoresponsive poly(N-isopropylacrylamide)
- FIG. 12f shows the CD response processed after individually measuring the scattering response according to LCP and RCP.
- the spectral peak of the negative signal redshift in this post-CD shifts from an average of 779.8 nm to 792.2 nm by irradiation.
- rotational motion is an essential technique for effectively controlling the CD response of assembled structures.
- this is a technology that has so far been only feasible through DNA origami.
- the mechanically chained structure exhibits a unique geometry that can convert linear forces into rotational motion.
- a torque of 0.04 aNbeam generated during the transformation process was found in the change of CD, which means that the AuNCat system can be used as a plasmonic nanomachine.
- the gold nanocatenane structure according to an embodiment of the present invention was synthesized by the following method.
- Rounded Au nanodiscs were fabricated using a three-step seed-mediated method using iodide ions. All preparations were performed in aqueous solution with deionized water. The seed solution covered with citric acid was prepared by adding 1 mL of 10 mM HAuCl 4 and 1 mL of 10 mM trisodium citrate solution in a 50 mL round bottom flask. Afterwards, 500 ⁇ L of ice-cold 200 mM NaBH 4 solution was rapidly injected. The solution was mixed with a stirring rod at 500 rpm for 1 minute and then aged at 27°C for 3 hours to completely hydrolyze unreacted NaBH 4 .
- the first two solutions contained 250 ⁇ L of 10 mM HAuCl 4 and 9 mL of 50 mM CTAB solution in a 25 mL glass bottle, and the last one was prepared by mixing 1.25 mL of 10 mM HAuCl 4 and 50 mM CTAB solution in a 50 mL round flask. did. All solutions were preheated at 27°C for 10 minutes, then other reagents were added and a three-step growth process was performed in a water bath at 27°C.
- the resulting mixture was then transferred to a flat glass-bottomed 70 ml bottle and left in an isothermal oven at 30°C overnight. Accordingly, triangular-shaped Au nanoplates settle on the bottom. After removing the supernatant, the precipitate is redispersed in 20 mL of DIW to synthesize rounded triangular Au nanoplates through atomic transfer over time. In this process, the LSPR of the synthesized Au nanoplate steadily shifted to blue up to 750 nm, and round Au nanodisks were synthesized.
- Edge-selective Pt shell growth of rounded Au nanodisks was performed in a 50 mL round bottom flask at 70 °C.
- 20 ml of 50 mM CTAB solution 125 ⁇ L of 2.5 mM NaI, 4 mL of synthesized rounded Au nanodiscs, and 20 ⁇ L of 1 mM AgNO 3 were added.
- 480 ⁇ L of 100 mM ascorbic acid was injected into the solution.
- the solution was stirred at 500 rpm for 1 hour.
- 480 ⁇ L of 100 mM HCl and 50 ⁇ L of 1 mM H 2 PtCl 6 were sequentially added using an injection interval of 30 seconds.
- the reaction was carried out in a 70°C water bath with stirring at 500 rpm for 3.5 hours, and the reaction mixture was centrifuged twice in DIW (3000 g, 15 min) and redistributed into 1 mL of DIW.
- Edge-selective Pt-shell growth of the prepared Au-core Pt-shell nanodiscs and Au-core Pt-shell nanodiscs was performed, followed by modification with PEG molecules.
- PEG molecular modification of nanoparticles was performed in a 1.5 mL Eppendorf tube. 10 ⁇ L of 10 mM PEG methyl ether thiol (1 kDa) was added to 1 mL of the synthesized Au-core Pt-shell quasi-nanodisk, and the solution was gently shaken overnight using an orbital shaker at room temperature. Half of the solution was transferred to another Eppendorf tube, and 500 ⁇ L of 1 mM CTAB was added to each tube. The mixture was centrifuged twice with 1 mM CTAB (2000 g, 15 min) and redistributed into 500 ⁇ L of DIW to obtain outer surface-protected Au-core Pt-shell nanodiscs.
- the solution was immediately centrifuged twice in DIW (7000 g, 10 min) at 16 °C and redistributed into 1 mL of 1% SDS solution.
- the positive charge of CTAB on the Au surface was reduced by centrifugation three times with 1% SDS and once more with 0.01% SDS (7000 g, 10 minutes).
- the final pellet was redistributed into 500 ⁇ L of 0.01% SDS.
- EDC/sulfo-NHS coupling between selectively modified Pt split nanorings was performed in a 1.5 mL Eppendorf tube.
- Carboxyl PEG-modified Pt split nanoring solution (dispersed in 10 ⁇ L of DIW), 10 ⁇ L of 1 mM EDC (in 100 MM MES buffer at pH 5.5), 10 ⁇ L of 1 mM Sulfo-NHS (in 100 MM MES buffer at pH 5.5), 10 ⁇ L amine PEG modified Pt split nanorings were added sequentially and stirred for 2 hours. Afterwards, it was centrifuged twice with 0.1% SDS solution (7000 g, 10 min) and redistributed into 500 ⁇ L of DIW.
- 125 ⁇ L of pre-chained Pt split nanoring solution was mixed with 250 ⁇ L of 1% PVP solution and a constant volume of DIW adjusting the total volume of the reaction mixture to 500 ⁇ L.
- equal volumes of 10 mM hydroxylamine and 2 mM HAuCl 4 were added to the solution.
- solutions of various volumes from 5 ⁇ L to 20 ⁇ L were used to obtain nanocatenane structures with different thicknesses (minor diameters).
- the solution was centrifuged twice with 0.01% SDS (2000 g, 10 min) and redistributed into 100 ⁇ L of DIW for future measurement and PNIPAM modification.
- PNIPAM-modified Au nanocatenanes were actuated with a focus laser (473 nm, Cobolt Blues). Optical responses were collected using the same dark-field illumination system as for single particle scattering measurements. Scattering spectra of unpolarized, LCP and RCP light were further processed through Savitzky-Golay filtering after background and lamp correction. The peak wavelength was extracted from the smooth signal.
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Abstract
Description
Claims (12)
- 적어도 2개의 연쇄된 링 구조체를 포함하고,상기 링 구조체는 코어 및 상기 코어를 커버하는 쉘을 포함하고,연쇄된 상기 링 구조체는 접합 영역에서 화학적으로 결합된, 나노카테난 구조체.
- 제1항에 있어서,상기 코어는 금속 또는 반도체 물질을 포함하는, 나노카테난 구조체.
- 제1항에 있어서,상기 링 구조체의 링 안쪽 면의 적어도 일부 영역은 DNA, 단백질, 리간드 중 적어도 하나로 개질되고,연쇄된 상기 링 구조체의 접합 영역에서는 상기 DNA, 단백질, 리간드 중 적어도 하나가 결합하여 생성된 가교분자가 제공되는, 나노카테난 구조체.
- 제3항에 있어서,상기 링 구조체의 링 바깥쪽 면은 티올 그룹을 포함하는 화합물로 개질된 구조를 갖는, 나노카테난 구조체.
- 제1항에 있어서,상기 링 구조체들은 서로 20 nm 내지 100 nm 거리로 이격된 상태로 연쇄된 구조를 갖는, 나노카테난 구조체.
- 제1항에 있어서,상기 링 구조체들은 서로 비틀린(tilted) 형태로 연쇄된, 나노카테난 구조체.
- 코어를 준비하는 제1 단계;상기 코어를 DNA, 단백질, 리간드 중 적어도 하나로 개질하여 개질된 코어를 준비하는 제2 단계;적어도 2개의 상기 개질된 코어를 반응시켜 연쇄시키는 제3 단계; 및연쇄된 상기 코어 상에 금속 또는 반도체를 성장시켜, 상기 개질된 코어의 결손 영역을 닫는 제4 단계를 포함하는, 나노카테난 구조체 합성방법.
- 제7항에 있어서,상기 제1 단계는나노플레이트를 준비하는 제1-1 단계;상기 나노플레이트의 가장자리를 따라 상기 코어를 성장시키는 제1-2 단계; 및상기 나노플레이트를 식각하여 상기 코어를 준비하는 제1-3 단계를 포함하는, 나노카테난 구조체 합성 방법.
- 제8항에 있어서,상기 제1-2 단계와 상기 제1-3 단계 사이에 상기 코어의 표면을 티올 그룹을 포함하는 화합물로 개질하는, 나노카테난 구조체 합성 방법.
- 제7항에 있어서,상기 제3 단계는 상기 개질된 코어의 링 바깥쪽 면에 제공된 DNA, 단백질, 리간드 중 적어도 하나를 반응시켜 화학적 결합을 형성하는 단계를 포함하는, 나노카테난 구조체 합성 방법.
- 나노카테난 구조체를 포함하고,상기 나노카테난 구조체는 광 유도 열 작동에 의해 직선형 힘을 회전 기계 운동으로 변환하고,상기 나노카테난 구조체는 적어도 2개의 연쇄된 링 구조체를 포함하고, 상기 링 구조체는 코어 및 상기 코어를 커버하는 쉘을 포함하고, 연쇄된 상기 링 구조체는 접합 영역에서 화학적으로 결합된, 나노머신.
- 제11항에 있어서,상기 나노카테난 구조체는 나노 구조의 원형 이색성(circular dichorism; CD)을 제어하는, 나노머신.
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| US18/838,251 US20250155279A1 (en) | 2022-08-04 | 2023-08-01 | Nanocatenane structure and nanomachine including nanocatenane structure |
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| KR1020220097408A KR102626722B1 (ko) | 2022-08-04 | 2022-08-04 | 나노카테난 구조체 및 나노카테난 구조체를 포함하는 나노머신 |
| KR10-2022-0097408 | 2022-08-04 |
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Non-Patent Citations (5)
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| DATTA SOUGATA; KATO YASUKI; HIGASHIHARAGUCHI SEIYA; ARATSU KEISUKE; ISOBE ATSUSHI; SAITO TAKUHO; PRABHU DEEPAK D.; KITAMOTO YUICHI: "Self-assembled poly-catenanes from supramolecular toroidal building blocks", NATURE, vol. 583, no. 7816, 15 July 2020 (2020-07-15), pages 400 - 405, XP037524618, DOI: 10.1038/s41586-020-2445-z * |
| LAURENCE RAEHM; JEAN‐MARC KERN; JEAN‐PIERRE SAUVAGE; CHRISTINE HAMANN; SERGE PALACIN; JEAN‐PHILIPPE BOURGOIN: "Disulfide‐ and Thiol‐Incorporating Copper Catenanes: Synthesis, Deposition onto Gold, and Surface Studies", CHEMISTRY - A EUROPEAN JOURNAL, JOHN WILEY & SONS, INC, DE, vol. 8, no. 9, 24 April 2002 (2002-04-24), DE, pages 2153 - 2162, XP071822726, ISSN: 0947-6539, DOI: 10.1002/1521-3765(20020503)8:9<2153::AID-CHEM2153>3.0.CO;2-E * |
| LEE JUNGHWA, LEE SUNGWOO, KIM JEONGWON, YOO SUNGJAE, LEE SOOHYUN, SON JIWOONG, HILAL HAJIR, GO SUNGEUN, LEE JAEWON, NAM JWA-MIN, P: "Synthesis of morphology controlled PtAu@Ag nanorings through concentric and eccentric growth pathways", CHEMICAL COMMUNICATIONS, ROYAL SOCIETY OF CHEMISTRY, UK, vol. 57, no. 81, 12 October 2021 (2021-10-12), UK , pages 10616 - 10619, XP093136292, ISSN: 1359-7345, DOI: 10.1039/D1CC04026J * |
| SHIN JIEUN, LEE SUNGWOO, YOO SUNGJAE, JUNG INSUB, LEE SOOHYUN, KIM JEONGWON, SON JIWOONG, KIM JI-EUN, KIM JAE-MYOUNG, NAM JWA-MIN,: "Enormous Enhancement in Single-Particle Surface-Enhanced Raman Scattering with Size-Controllable Au Double Nanorings", CHEMISTRY OF MATERIALS, AMERICAN CHEMICAL SOCIETY, US, vol. 34, no. 5, 8 March 2022 (2022-03-08), US , pages 2197 - 2205, XP093136295, ISSN: 0897-4756, DOI: 10.1021/acs.chemmater.1c03882 * |
| T. L. SCHMIDT; A. HECKEL: "Construction of a Structurally Defined Double-Stranded DNA Catenane", NANO LETT, vol. 11, 1 January 2011 (2011-01-01), pages 1739 - 1742, XP002781763, DOI: 10.1021/nl200303m * |
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| US20250155279A1 (en) | 2025-05-15 |
| KR102626722B1 (ko) | 2024-01-22 |
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