CN110203880B - A kind of preparation method of optical-drive magnetron integrated micro-nano motor - Google Patents

Abstract

A method for preparing a CD-ROM magnetic control integrated micro-nano motor belongs to the technical field of nano motors. Sputtering an Ag layer on the outer surface of the porous anodic aluminum oxide template, pouring an Au solution into each placing hole of the porous anodic aluminum oxide template, depositing and fixing, pouring a Fe solution into each placing hole of the porous anodic aluminum oxide template, depositing and fixing, heating the porous anodic aluminum oxide template to convert the Fe solution after deposition and fixation into iron oxide, washing the porous anodic aluminum oxide template and the Ag layer through deionized water to dissolve and corrode, and thus obtaining a plurality of Au-Fe oxide bimetallic rods, namely micro-nano motors. The invention can move under illumination and realize steering under the control of a magnetic field, and has considerable movement speed.

Description

A preparation method of an optical drive magnetron integrated micro-nano motor

technical field

The invention relates to a preparation method of an optical drive magnetron integrated micro-nano motor, which belongs to the technical field of micro-nano motors.

Background technique

The 2016 Nobel Prize in Chemistry was awarded to the study of molecular machines, the smallest machines in the world, which culminated in the study of tiny machines at the micro-nano scale. A micro-nano motor is a micro-nano device that can convert other forms of energy into kinetic energy to generate autonomous motion. Due to this unique property, it has many attractive application prospects in drug delivery, biosensing, micro-repair, etc.

Since Paxton et al. discovered micro-nano Au-Pt bimetallic rods in 2004, researchers have learned a lot about micro-nano motors. It has been found that there are dozens of individual motion modes of micro-nano motors. So far, it has been found that the motor energy sources mainly come from two types: one is the chemical field represented by the particle concentration gradient on the surface of colloidal particles, and the other is through Apply additional ultrasonic field, thermal field, magnetic field or light etc. Chemically driven micro-nano motors generally have relatively fast speeds, but due to the need for chemical reagents and reactions, such micro-nano motors face huge problems in real biomedical and other fields; micro-nano motors driven by external sources not only do not use H ₂ Chemical reagents such as O ₂ can also precisely control the direction of movement of the motor, so at present, micro-nano motors mostly stimulate the motor through external physical fields to realize their autonomous movement.

Contents of the invention

In order to solve the problems existing in the background technology, the present invention provides a preparation method of an optical drive magnetron integrated micro-nano motor.

To achieve the above object, the present invention adopts the following technical solutions: a method for preparing an optical drive magnetron integrated micro-nano motor, said method comprising the following steps:

Step 1: sputtering an Ag layer on the inner surface of each placement hole of the porous anodized aluminum template;

Step 2: Pour Au solution into each placement hole of the porous anodized aluminum template, and deposit and fix it by electrodeposition, and the deposition time is 10-20 minutes;

Step 3: pour Fe solution into each placement hole of the porous anodized aluminum template, and deposit and fix it by electrolytic reduction of ferrous sulfate. The precipitation time is 30 minutes;

Step 4: Annealing and heating the porous anodized aluminum template, so that the Fe solution after deposition and fixation is converted into Fe oxide;

Step 5: Dissolving and etching the porous anodized aluminum template and the Ag layer by washing with deionized water, to obtain multiple Au-Fe oxide bimetallic rods, that is, micro-nano motors.

Compared with the prior art, the beneficial effect of the present invention is that the present invention can not only move under light, but also realize turning under the control of a magnetic field, and has a considerable moving speed at the same time.

Description of drawings

1 is a schematic diagram of the preparation process of the optical drive magnetron integrated micro-nano motor of the present invention;

Fig. 2 is a structural diagram of the micro-nano motor of the present invention.

Detailed ways

The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of them. Based on the present invention All other embodiments obtained by persons of ordinary skill in the art without creative efforts, all belong to the scope of protection of the present invention.

Specific Embodiment 1: As shown in Figures 1 to 2, the present invention discloses a method for preparing an optical drive magnetron integrated micro-nano motor. The method includes the following steps:

Step 1: sputtering an Ag layer 2 on the inner surface of each placement hole of the porous anodized aluminum template 1;

Step 2: Pour Au solution 4 into each placement hole of the porous anodized aluminum template 1, and deposit and fix it by electrodeposition, and the deposition time is 10-20 minutes;

Step 3: pour Fe solution 3 into each placement hole of porous anodized aluminum template 1, and deposit and fix by electrolytic reduction of ferrous sulfate, and the precipitation time is 30 minutes;

Step 4: annealing and heating the porous anodized aluminum template 1, so that the deposited and fixed Fe solution 3 is transformed into Fe oxide 5;

Step 5: Dissolving and etching the porous anodized aluminum template 1 and the Ag layer 2 by washing with deionized water to obtain a plurality of Au-Fe oxide bimetallic rods, that is, micro-nano motors 6 .

Embodiment 2: As shown in FIG. 1 , this embodiment is a further description of Embodiment 1, and the thickness of the Ag layer 2 is 200 nm.

Specific embodiment three: As shown in Figure 1, this embodiment is a further description of specific embodiment one, the height of Au solution 4 and Fe solution 3 poured in each placement hole of the porous anodized aluminum template are the same.

Embodiment 4: This embodiment is a further description of Embodiment 3. The pouring heights of the Au solution 4 and the Fe solution 3 are both 1.5 μm.

Embodiment 5: This embodiment is a further description of Embodiment 1 or Embodiment 3. The diameter of each placement hole of the porous anodized aluminum template 1 is 500nm-40μm.

Embodiment 6: This embodiment is a further description of Embodiment 1. When the micro-nano motor 6 is suspended in the H ₂ O ₂ solution, if there is no light, the micro-nano motor 6 only exhibits Brownian motion; If there is light, the micro-nano motor 6 can move towards the Fe oxide 5 at a speed of tens of microns per second. The specific movement speed is affected by light intensity and H ₂ O ₂ concentration.

When an external magnetic field is applied, due to the presence of Fe ₃ O ₄ , the micro-nano motor 6 has ferromagnetism and will be arranged in the direction of the magnetic field lines. By changing the external magnetic field, the steering of the micro-nano motor 6 can be manipulated.

It will be obvious to a person skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, but that it can be implemented in other configurations without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents are included in the invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. A preparation method for an optical drive magnetron integrated micro-nano motor, characterized in that: the method comprises the steps: Step 1: sputtering an Ag layer (2) on the inner surface of each placement hole of the porous anodized aluminum template (1); Step 2: Pour Au solution (4) into each placement hole of the porous anodized aluminum template (1), and deposit and fix it by electrodeposition, and the deposition time is 10-20 minutes; Step 3: Pouring Fe solution (3) into each placement hole of the porous anodized aluminum template (1), depositing and fixing by electrolytic reduction of ferrous sulfate, and the precipitation time is 30 minutes; Step 4: performing annealing heat treatment on the porous anodized aluminum template (1), so that the deposited and fixed Fe solution (3) is converted into Fe oxide (5); Step 5: Dissolving and etching the porous anodized aluminum template (1) and the Ag layer (2) by washing with deionized water to obtain a plurality of Au-Fe oxide bimetallic rods, that is, micro-nano motors (6). 2 . The method for preparing an optical drive magnetron integrated micro-nano motor according to claim 1 , wherein the Ag layer ( 2 ) has a thickness of 200 nm. 3 . 3. The preparation method of a kind of optical drive magnetron integrated micro-nano motor according to claim 1, characterized in that: the Au solution (4) poured in each placement hole of the porous anodized aluminum template (1) And the height of Fe solution (3) is all the same. 4 . The method for preparing an optical drive magnetron integrated micro-nano motor according to claim 3 , wherein the pouring heights of the Au solution ( 4 ) and the Fe solution ( 3 ) are both 1.5 μm. 5. The preparation method of a kind of optical drive magnetron integrated micro-nano motor according to claim 1 or 3, characterized in that: the diameter of each placement hole of the porous anodized aluminum template (1) is 500nm- 40 μm. 6. The method for preparing a micro-nano motor integrated with optical drive magnetron according to claim 1, characterized in that: when the micro _- nano motor ( ₆ ) is suspended in the H2O2 solution, if there is no light , the micro-nanomotor (6) only exhibits Brownian motion; if there is light, the micro-nanomotor (6) moves in the direction of the Fe oxide (5).

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