CN2624354Y - Liquid phase atomic force microscope probe - Google Patents
Liquid phase atomic force microscope probe Download PDFInfo
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- CN2624354Y CN2624354Y CNU032308922U CN03230892U CN2624354Y CN 2624354 Y CN2624354 Y CN 2624354Y CN U032308922 U CNU032308922 U CN U032308922U CN 03230892 U CN03230892 U CN 03230892U CN 2624354 Y CN2624354 Y CN 2624354Y
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- 239000000523 sample Substances 0.000 title claims abstract description 78
- 239000007791 liquid phase Substances 0.000 title claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 239000000919 ceramic Substances 0.000 claims abstract description 20
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- -1 specimen holder Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 abstract description 2
- 230000003028 elevating effect Effects 0.000 abstract description 2
- 239000012212 insulator Substances 0.000 abstract description 2
- 239000004065 semiconductor Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- 230000011514 reflex Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01Q—SCANNING-PROBE TECHNIQUES OR APPARATUS; APPLICATIONS OF SCANNING-PROBE TECHNIQUES, e.g. SCANNING PROBE MICROSCOPY [SPM]
- G01Q30/00—Auxiliary means serving to assist or improve the scanning probe techniques or apparatus, e.g. display or data processing devices
- G01Q30/08—Means for establishing or regulating a desired environmental condition within a sample chamber
- G01Q30/12—Fluid environment
- G01Q30/14—Liquid environment
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The utility model discloses a liquid phase atomic force microscope probe, successively comprising a photoelectric detection system consisting of a laser and a position sensitive device (PSD); a scanning and feedback control system consisting of XYZ piezoelectric ceramic, a gas-liquid isolating plate and a micro-cantilever probe; a liquid phase unit that can rise and fall consisting of a sample, a specimen holder, a liquid pond and an elevating table. The liquid phase atomic force microscope probe of the utility model is simple in structure, easy to be realized technologically and widely suitable for the real-time measurement and observation of a conductor, a semiconductor and an insulator sample in air, liquid or even electrochemical environment. Thus it may find its wide application in various fields of science, technology and industry.
Description
Technical field
The utility model relates to a kind of atomic force microscope probe, is used for the nanometer detection of micro-/ nano material and device, relates in particular to a kind of liquid phase atomic force microscope probe.
Background technology
Along with the develop rapidly of nanometer technology, scanning tunnel microscope (STM) has become the indispensable important tool of nanosecond science and technology worker with atomic force microscope ultrahigh resolution instruments such as (AFM).At this wherein, the application of AFM is more extensive.AFM is a kind of high precision, highly sensitive surface observation and testing tool, is applicable to conduction and non-conductive sample, and can operates in most of corrosive solution and gas
[4.5]These superior functions not only enable to obtain the data of relevant surface structure, can also be directly, observe and obtain the multidate information that valuable surface changes at atom or nanometer scale in real time.At present, the application of AFM instrument is comparatively universal in the world, the then still basic dependence on import of China.Although the performance of import instrument is gradually improved, but have no need for reticence, the operation requirement of the expensive price of this quasi-instrument, strictness, and to the dependence of some crucial imported equipments and parts, limited AFM applying at home greatly, thereby the development that has restricted China nanosecond science and technology is to a great extent popularized.Press for production domesticization for this reason, and improve the P/C ratio of instrument according to national conditions as far as possible AFM.In recent years, we have done a large amount of work in development and the application facet of AFM, series A FM such as horizontal, liquid phase and double base have been worked out, the characteristics of self have been formed, the P/C ratio of instrument has remarkable advantages, field widespread uses such as the physics of scientific research institutions, chemistry, materialogy, microelectronics, micromachine and optics at home.Be development and universal the contributing that promotes China's nanometer technology.
Summary of the invention
The purpose of this utility model provides a kind of liquid phase atomic force microscope probe.
Have scanning and the feedback control system that photodetector system, XYZ piezoelectric ceramics, gas-liquid trap-out tray and micro-cantilever probe that laser instrument and position sensor (PSD) form are formed successively in it, and the liftable liquid phase unit of forming by sample, specimen holder, liquid cell and lifting table.
Liquid phase atomic force microscope probe of the present utility model, utilize the faint atomic force between needle point and the sample, make micro-cantilever produce deflection, detect the size of amount of deflection by photoelectric detecting method, thereby in needle point and sample are made the process of relative scanning, obtain the 3-D nano, structure pattern of sample surfaces.Because the shake of liquid level will influence the trend of system light path in scanning process, cause serious error, common AFM probe can not be operated in the liquid phase environment.And our the liquid phase AFM sonde configuration of design is succinct, and technical conditions are easy to realize.At first we have used a transparent glass as the gas-liquid trap-out tray, and microprobe is fixed on the contract type skewback of isolating below the platform, and this structure can satisfy the light path requirement, can prevent the trend of the influence of fluctuations folded light beam of liquid level again; Secondly aspect scan mode, general A FM is that the drive pressure electroceramics is made stretching motion in three directions of xyz, thereby make sample laterally do scanning motion with sample stage, this mode has all been brought restriction to the size of testee, sweep limit, long-time measuring stability or the like.Therefore, we have adopted the scan mode that probe moves in the xyz direction with piezoelectric ceramics.In addition, consider probe when approaching sample, need to observe probe near situation, in order to avoid bump disconnected probe, we have also designed special-purpose liquid phase unit.The liquid cell sidewall is transparent visual, is specimen holder in the middle of the liquid cell, and it is to be measured that testing sample is fixed in the above etc.Be a lifting table below the liquid cell, be used for regulating the distance between sample and the microprobe.The utility model liquid phase atomic force microscope probe is widely used in conductor, semiconductor and insulator sample, both can in air, measure, can under liquid even electrochemical environment, carry out Real Time Observation and measurement again, be expected to be used widely in numerous science and technology and industrial circle.
Description of drawings
Fig. 1 is the principle of work synoptic diagram of liquid phase atomic force microscope;
Fig. 2 is the structural representation of I type liquid phase atomic force microscope probe;
Fig. 3 is the structural representation of II type liquid phase atomic force microscope probe.
Embodiment
The probe that the core component of liquid phase atomic force microscope is made up of scanning and feedback controller, photodetector system and liquid phase unit, it directly influences the performances such as detection resolution, accuracy of detection, sweep limit and signal to noise ratio (S/N ratio) of atomic force microscope.The purpose of this utility model is to invent a kind of liquid phase atomic force microscope probe, makes the atomic force microscope system when obtaining better nanometer detection performance, further expands its range of application.
Shown in Figure 1 is the principle of work synoptic diagram of liquid phase atomic force microscope.Liquid phase atomic force microscope of the present utility model probe comprises the scanning be made up of XYZ piezoelectric ceramics, gas-liquid trap-out tray and micro-cantilever probe and feedback control system 1 and photodetector system of being made up of laser instrument and position sensor (PSD) 2 and liftable liquid phase unit 3 three parts of being made up of sample, specimen holder, liquid cell and lifting table.AFM adopts the extremely responsive micro-cantilever of faint power as force transducer.Micro-cantilever one end is fixed, and the other end is equipped with a pyramid shape micro needlepoint vertical with the micro-cantilever plane.When the distance between needle point and the sample is approached to a certain degree, will produce interactional atomic force between the two, promote micro-cantilever deflection.The amount of deflection of micro-cantilever is very small, can't directly detect, and needs to adopt the beam deflection method to measure indirectly.Its principle is, beam of laser is reflected after projecting the outer end of micro-cantilever, and folded light beam is received by position sensor.Obviously, the yaw displacement amount of the hot spot on the position sensor photosurface, be directly proportional with the amount of deflection of micro-cantilever, but the former has amplified 1,000 to thousands of times than the latter, the displacement after the amplification can be directly accurately measured by the size of the output photocurrent of detection position sensitive element.Because atomic size and needle point---sample interval becomes certain corresponding relation, i.e. fluctuating with sample surfaces has corresponding relation.When needle point is done transversal scanning with respect to sample, the atomic force that acts on the needle point changes with the fluctuating of sample surfaces, the size of detection position sensitive element output photocurrent, can know the size of micro-cantilever amount of deflection (corresponding to atomic force) by inference, finally obtain the nanoscale microscopic appearance of sample surfaces.
Needle point is realized by X and Y-axis piezoelectric ceramics with respect to the transversal scanning of sample.When applying generating positive and negative voltage on the electrode at piezoelectric ceramics, piezoelectric ceramics will axially stretch.Scanning voltage signal by the computing machine generation with certain frequency, amplitude and waveform, through computer interface output, and after the XY sweep circuit amplifies, be applied on X and the Y-axis piezoelectric ceramics, make piezoelectric ceramics make stretching motion, thereby make needle point laterally do scanning motion with the gas-liquid trap-out tray.
On the other hand, also need to maintain a certain distance to (horizontal direction among the figure) at Z between needle point and the sample.When distance is too far away, there is not the atomic force effect between needle point and the sample; When distance was too near, needle point may be fractureed.Adopted Z to make and kept suitable distance between needle point and the sample to feedback control circuit.Z adjusts the voltage swing that is applied on the Z axial compression electroceramics to the size of feedback control circuit according to the micro-cantilever amount of deflection.When needle point and sample interval when far away, apply positive voltage and make this piezoelectric ceramics elongation, promptly allow needle point suitably near sample, otherwise piezoelectric ceramics shunk, thereby all the time needle point and sample are controlled at suitable distance.
The photo-signal (corresponding to the surface topography information of sample) of position sensor output after the processing and amplifying through input and treatment circuit, is input to computing machine by computer interface, draws out the three-dimensional micro-morphology of sample surfaces thus.
In the I of atomic force microscope shown in Figure 2 type liquid phase probe, the liquid phase probe is made up of scanning and feedback controller 1, photodetector system 2 and liquid phase unit 3 three parts.Scanning comprises X-axis piezoelectric ceramics 4, Y-axis piezoelectric ceramics 5, Z axial compression electroceramics 6, gas-liquid trap-out tray 7 and micro-cantilever (containing needle point) 8 with feedback controller 1.X, Y, Z axial compression electroceramics three are orthogonal, and their end is all bonding with the gas-liquid trap-out tray, and the other end is fixing respectively, and micro-cantilever (containing needle point) is adhesively fixed on the contract type piece under the gas-liquid trap-out tray.Photodetector system 2 comprises laser instrument 9, parts such as position sensor 10.Liquid phase unit 3 comprises sample 11, specimen holder 12, liquid cell 13 and lifting table 14.Laser instrument emitted laser bundle projects on the photosurface of position sensor after the reflection of the outer end of micro-cantilever, one of position sensor output and the corresponding photo-signal in the position of flare on photosurface.Regulating elevating mechanism can make micro-cantilever and needle point approach to sample surfaces.When micro-cantilever and needle point when sample surfaces approaches certain distance, will produce faint atomic force (along vertical direction among Fig. 2) between the two, promote micro-cantilever and do micro-deflection.Because the optical path length (about 7.5 centimetres) from micro-cantilever to the position sensitive element is far longer than the length (100 μ m or 200 μ m) of micro-cantilever, according to lever principle, facula deviation amount on the photosurface of position sensor will be thousands of times of micro-cantilever amount of deflection, therefore can detect considerable output photocurrent variations.Make stretching motion when controlling X and Y-axis piezoelectric ceramics, when promptly controlling needle point and doing the XY scanning motion with respect to sample, the output photocurrent size of position sensor changes with the fluctuating of sample surfaces, utilize the variation of input shown in Figure 1 and treatment circuit detection record photocurrent, can draw out the 3-D nano, structure pattern of sample surfaces by computer system.
The I type liquid phase probe of atomic force microscope, making one with clear glass goes up to being the gas-liquid trap-out tray of contract type piece under the circle, micro-cantilever and needle point are adhesively fixed on contract type piece, laser beam sees through trap-out tray to needle point, reflex on the position sensor again, this design has overcome in scanning process, thereby makes folded light beam produce the precision of shake influence measurement and the shortcoming of degree of stability because surface tension causes liquid fluctuating.In addition, select the mode of probe scanning, also make sample not be subjected to the restriction of its quality, size, make its application more extensive.The liquid cell of liquid phase unit and specimen holder are all made with corrosion resistant clear glass, can allow sample approach probe very easily with lifting table, therefore have better operability.
The II type liquid phase probe of atomic force microscope shown in Figure 3 also comprises by scanning and feedback controller 1, photodetector system 2 and liquid phase unit 3 three parts and forming.Scanning and feedback controller 1 be by tubular piezo-electric pottery 15, fixed block 16, and gas-liquid trap-out tray 7 and micro-cantilever (containing needle point) 8 are formed.Photodetector system 2 is equally by laser instrument 9, and position sensor 10 grades are partly formed.Tubular piezo-electric pottery outside surface and inside surface all are coated with metal electrode, and inside surface is the Z electrode; Outside surface is evenly divided into the quartern along its length, and each is divided into an electrode, is followed successively by X
+, Y
+, X
-, Y
-Electrode.At X
+And X
-Apply positive voltage and negative voltage on the electrode respectively, can make needle point do scanning motion along the X-axis positive dirction, otherwise, at X
+And X
-Apply negative voltage and positive voltage on the electrode respectively, then make needle point do scanning motion along the X-axis negative direction; Equally, at Y
+And Y
-Apply positive voltage and negative voltage on the electrode respectively, can make needle point do scanning motion, otherwise then make needle point do scanning motion along the Y-axis negative direction along the Y-axis positive dirction.On piezoelectric ceramics pipe internal surface Z electrode, apply positive voltage, then make the ceramic pipe overall elongated, make needle point more approach sample, otherwise make needle point, can reach equally in view of the above needle point away from sample---the purpose of the FEEDBACK CONTROL of sample interval.The II type liquid phase probe of atomic force microscope shown in Figure 3, its principle of work is identical with I type liquid phase probe, realizes that just XY scanning and Z adopt the tubular piezo-electric pottery to the piezoelectric ceramics of FEEDBACK CONTROL.II type liquid phase probe also possesses the principal feature of I type liquid phase probe, and, owing to adopted the tubular piezo-electric pottery, make scanning and feedback controller structure more succinct, be easy to the miniaturization of popping one's head in.
Claims (5)
1. a liquid phase atomic force microscope is popped one's head in, it is characterized in that scanning and feedback control system (1) that photodetector system (2), XYZ piezoelectric ceramics, gas-liquid trap-out tray and micro-cantilever probe that it has laser instrument and position sensor (PSD) successively and forms are formed, and the liftable liquid phase unit of forming by sample, specimen holder, liquid cell and lifting table (3).
2. a kind of liquid phase atomic force microscope probe according to claim 1, it is characterized in that said scanning and feedback controller (1) have X-axis piezoelectric ceramics (4), Y-axis piezoelectric ceramics (5), Z axial compression electroceramics (6), gas-liquid trap-out tray (7) and contain the micro-cantilever (8) of needle point, X, Y, Z axial compression electroceramics three are orthogonal, their end is all bonding with the gas-liquid trap-out tray, and the other end is fixing respectively.
3. a kind of liquid phase atomic force microscope probe according to claim 1 is characterized in that said scanning and feedback controller (1) have tubular piezo-electric pottery (15), fixed block (16), gas-liquid trap-out tray (7) successively and contain the micro-cantilever (8) of needle point.
4. a kind of liquid phase atomic force microscope probe according to claim 1, it is characterized in that said photodetector system (2) has laser instrument (9), position sensor (10), laser instrument emitted laser bundle is after the outer end reflection of micro-cantilever, project on the photosurface of position sensor one of position sensor output and the corresponding photo-signal in the position of flare on photosurface.
5. a kind of liquid phase atomic force microscope probe according to claim 1 is characterized in that said liftable liquid phase unit (3) has lifting table (14), specimen holder (12), sample (11), liquid cell (13) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032308922U CN2624354Y (en) | 2003-04-28 | 2003-04-28 | Liquid phase atomic force microscope probe |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU032308922U CN2624354Y (en) | 2003-04-28 | 2003-04-28 | Liquid phase atomic force microscope probe |
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| CN2624354Y true CN2624354Y (en) | 2004-07-07 |
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| CNU032308922U Expired - Fee Related CN2624354Y (en) | 2003-04-28 | 2003-04-28 | Liquid phase atomic force microscope probe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115432A (en) * | 2015-09-01 | 2015-12-02 | 武汉华星光电技术有限公司 | Detection system and method of coating membrane thickness |
| CN108489414A (en) * | 2018-05-07 | 2018-09-04 | 中国矿业大学 | A kind of micro/nano-scale memorial alloy round trip memory strain test device and test method |
| CN113466495A (en) * | 2021-08-19 | 2021-10-01 | 中国科学院兰州化学物理研究所 | Ultralow-temperature high-vacuum atomic force microscope system |
-
2003
- 2003-04-28 CN CNU032308922U patent/CN2624354Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115432A (en) * | 2015-09-01 | 2015-12-02 | 武汉华星光电技术有限公司 | Detection system and method of coating membrane thickness |
| CN108489414A (en) * | 2018-05-07 | 2018-09-04 | 中国矿业大学 | A kind of micro/nano-scale memorial alloy round trip memory strain test device and test method |
| CN113466495A (en) * | 2021-08-19 | 2021-10-01 | 中国科学院兰州化学物理研究所 | Ultralow-temperature high-vacuum atomic force microscope system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |