Biocompatible iron-manganese dioxide system micro-nano motor and preparation method thereof

A manganese dioxide, micro-nano technology, applied in microstructure technology, gaseous chemical plating, microstructure devices, etc., can solve the problems of inability to form surface morphology, inaccurate regulation of element composition and content, etc. Compatibility, less damage to human body, effect of reducing manganese content

Pending Publication Date: 2020-04-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Due to the difficulty of existing preparation techniques, micro-nano motors prepared by electrodeposition generally change the elemental composition and surface morphology of micro-nano motors by adjusting the amount of deposited charges and deposited elements. These methods are often chemically Realized, the control of element composition and content is not accurate enough, and it is impossible to form a unique surface morphology

Method used

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  • Biocompatible iron-manganese dioxide system micro-nano motor and preparation method thereof
  • Biocompatible iron-manganese dioxide system micro-nano motor and preparation method thereof
  • Biocompatible iron-manganese dioxide system micro-nano motor and preparation method thereof

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Embodiment 1

[0036] A method for preparing a biocompatible iron-manganese dioxide system micro-nano motor, comprising the following steps:

[0037] Step 1: Use a polycarbonate film sputtered with a 30-nanometer thick Au metal layer on one side as the working electrode, platinum wire as the auxiliary electrode, and an Ag / AgCl electrode as the reference electrode, and add polyethylenedioxythiophene (PEDOT) to the electrolytic cell. ) electrolyte, using electrochemical workstation to carry out electrochemical deposition of polyethylenedioxythiophene (PEDOT) support outer layer in polycarbonate film, set deposition voltage as 1.0V, deposition charge as 0.2C, deposition time as 108 second; step 2: the polycarbonate film with a side sputtered with a thickness of 30 nanometers of Au metal layer is used as the working electrode, the stainless steel sheet with an area of ​​10 square centimeters is used as the auxiliary electrode, and the Ag / AgCl electrode is used as the reference electrode, prepared...

Embodiment 2

[0046] A method for preparing a biocompatible iron-manganese dioxide system micro-nano motor, comprising the following steps:

[0047] Step 1: Use a polycarbonate film sputtered with a 45-nm thick Au metal layer on one side as the working electrode, a platinum wire as the auxiliary electrode, and an Ag / AgCl electrode as the reference electrode, and add polyethylenedioxythiophene (PEDOT) to the electrolytic cell. ) electrolyte solution, using electrochemical workstation to carry out electrochemical deposition of polyethylenedioxythiophene (PEDOT) support outer layer in polycarbonate film, set deposition voltage as 1.2V, deposition charge as 0.3C, deposition time as 126 second; step 2: the polycarbonate film with a side sputtered with a thickness of 45 nanometers of Au metal layer is used as the working electrode, the stainless steel sheet with an area of ​​16 square centimeters is used as the auxiliary electrode, and the Ag / AgCl electrode is used as the reference electrode, prep...

Embodiment 3

[0056] A method for preparing a biocompatible iron-manganese dioxide system micro-nano motor, comprising the following steps:

[0057] Step 1: Use a polycarbonate film sputtered with a 40-nanometer thick Au metal layer on one side as the working electrode, platinum wire as the auxiliary electrode, and an Ag / AgCl electrode as the reference electrode, and add polyethylenedioxythiophene (PEDOT) to the electrolytic cell. ) electrolyte solution, using electrochemical workstation to carry out electrochemical deposition of polyethylenedioxythiophene (PEDOT) support outer layer in polycarbonate film, set deposition voltage as 1.4V, deposition charge as 0.4C, deposition time as 130 second; step 2: the polycarbonate film with a side sputtering 40 nanometers of thickness Au metal layer as the working electrode, the stainless steel sheet with an area of ​​12 square centimeters as the auxiliary electrode, and the Ag / AgCl electrode as the reference electrode, prepared in step 1 On the basis...

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Abstract

The invention discloses a biocompatible iron-manganese dioxide system micro-nano motor and a preparation method thereof, belongs to the field of micro-motor preparation and application, and can greatly reduce the manganese content in the micro-nano motor and improve the biocompatibility of the micro-nano motor under the condition of not reducing the movement speed of the micro-nano motor. According to the invention, the preparation method combines electrochemical deposition and an ultrasonic field, and comprises the steps of firstly, supporting an outer polyethylene dioxythiophene (PEDOT) layer and a middle Fe layer through electrochemical deposition, and then introducing an ultrasonic field while electrochemically depositing an inner MnO2 layer. The obtained micro-nano motor is of a three-layer hollow tubular structure, the content of manganese is reduced from 17.68% to 4.71%-11.33%, but the movement speed can still reach 300-700[mu]m/s, so that the manganese content of the micro-nanomotor is greatly reduced under the condition that the movement speed of the micro-nano motor is not reduced, and the biocompatibility of the micro-nano motor is improved.

Description

technical field [0001] The invention belongs to the field of micro-motor preparation and application, in particular to a biocompatible iron-manganese dioxide system micro-nano motor and a preparation method thereof. Background technique [0002] With the development of nanoscience and nanotechnology, self-propelled micro / nanomachines capable of converting localized chemical fuels or external energy into nanoscale motions have become powerful tools for active drug delivery, environmental restoration, biodiagnostics, and cell manipulation. The methods used to synthesize nanomotors include electrodeposition, physical vapor deposition, grazing angle deposition, curling, and 3D laser direct writing. Significant efforts have been made over the past nearly two decades to develop simple and low-cost strategies. So far, three classical modes of electrodeposition (i.e., potentiodynamic, potentiostatic, and galvanostatic) have been widely used to fabricate micro / nanomachines to obtain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N11/00B81C1/00
CPCB81B2201/03B81C1/00349H02N11/006
Inventor 沈晖芦小龙徐钰森陆家钰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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