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Double photo-responsive aluminum oxide nano channel based on N3 and spiropyrane molecular modification and preparation method thereof

A technology of alumina nano and spiropyran molecules, applied in nanostructure manufacturing, nanotechnology, nano optics, etc., can solve the problems of low mechanical properties, poor repeatability of channel materials, poor stability, etc., and achieve the effect of current amplification characteristics

Inactive Publication Date: 2018-02-09
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of photoresponsive nanochannel is mostly a single nanochannel system and still only responds to ultraviolet light. It also has the disadvantages of poor repeatability, poor stability and low mechanical properties based on channel materials, and there are certain application limitations.

Method used

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  • Double photo-responsive aluminum oxide nano channel based on N3 and spiropyrane molecular modification and preparation method thereof
  • Double photo-responsive aluminum oxide nano channel based on N3 and spiropyrane molecular modification and preparation method thereof
  • Double photo-responsive aluminum oxide nano channel based on N3 and spiropyrane molecular modification and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment is an hourglass-type alumina nanochannel system. The hourglass-type alumina nanochannel film is prepared by an oxalic acid solution anodizing method, the oxidation voltage is 50V, and the hourglass-type structure is obtained by in-situ expansion using current monitoring; The thickness of the hourglass-type alumina nanochannel film is about 98um; the pore diameter at both ends of the hourglass-type alumina nanochannel film is about 35nm, and the middle pore diameter is about 10nm.

[0037] The preparation of the hourglass alumina nanochannel adopts a combination of double-sided anodization and in-situ hole expansion. The specific operation steps are as follows:

[0038] (1) A flat aluminum sheet with a purity of 99.999% and a thickness of about 100 μm is ultrasonically cleaned with acetone, absolute ethanol and high-purity water for 5 minutes, and then electrochemically polished in a mixture of perchloric acid and ethanol (1:4). The polishing time was 5 minute...

Embodiment 2

[0045] A solution method is used to modify the APTES molecules on the hourglass-type alumina nanochannel.

[0046] The picoammeter was used as the control circuit to perform IV performance test on the hourglass alumina nanochannel modified by the APTES molecule; wherein the electrolyte solution was a KCl solution with a concentration of 1 mM / L and the pH of the solution was 3; the APTES molecule was modified The voltage scanning range of the hourglass alumina nanochannel is from -2V to +2V, and it is concluded that the ion current fluctuates with the fluctuation of the applied voltage, such as figure 1 As shown, the tested I-V curve is linear, so the alumina nanochannel modified by the APTES molecule has no ion rectification characteristics.

[0047] The contact angle measurement of the alumina nanochannel and the alumina nanochannel modified with APTES shows that the bare-hole alumina nanochannel is more hydrophilic ( figure 1 In the middle b and c are the contact angles of the upp...

Embodiment 3

[0049] A solution method is used to perform single-sided modification of N3 molecules on the alumina nanochannel modified by APTES.

[0050] Using the picoammeter as the control circuit, the IV performance test was performed on the hourglass-type alumina nanometer modified on one side of the N3 molecule; wherein the electrolyte solution was a KCl solution with a concentration of 1 mM / L and a pH of 3; the N3 The voltage sweep range of the hourglass alumina nanochannel modified on one side of the molecule is from -2V to +2V, and the results are as follows figure 2 , It is concluded that the ion current fluctuates with the fluctuation of the applied voltage, and the tested IV curve is non-linear. Therefore, the hourglass-type alumina nanochannel modified by the single side of the N3 molecule exhibits ion rectification characteristics, that is, the voltage is at -2V In the negative voltage region to +0V, a larger current is exhibited, and the hourglass alumina nanochannel exhibits an...

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Abstract

The invention discloses a double photo-responsive aluminum oxide nano channel based on N3 and spiropyane molecular modification and a preparation method thereof, and belongs to the technical field ofphoto-responsive nano channels. The hourglass aluminum oxide nano channel of a symmetrical structure is adopted to serve as a template, N3 molecules and spiropyrane molecules are modified chemically through asymmetry, a porous nano channel which is double photo-responsive to visible light and ultraviolet light is prepared, the porous nano channel can achieve double photo-responsive to the visiblelight and the ultraviolet light, current amplification, ion selectivity and rectification characteristics, and provides new research thoughts for development and application of devices based on a photovoltaic conversion principle.

Description

Technical field [0001] The present invention relates to the technical field of light-responsive nanochannels, in particular to a dual-light-responsive alumina nanochannel modified by N3 and spiropyran molecules. Background technique [0002] Ion channels in organisms in nature respond specifically to a variety of stimuli, such as pH, light, electricity, magnetism, and temperature, to maintain the normal operation of life. Among them, the light responsiveness of ion channels has received widespread attention as the theoretical basis for the study of photoelectric energy conversion systems. It has the advantages of remote control of ion currents and in-situ non-destructive testing. [0003] Light-responsive nanochannels can usually be prepared in two ways: one is to directly prepare nanochannels using photocatalytic materials such as titanium dioxide to achieve light-controlled ion transport performance. However, due to the limitation of the titanium dioxide nano-channel structure, ...

Claims

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Application Information

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IPC IPC(8): C25D9/02C25D5/54B82B1/00B82Y20/00
CPCC25D9/02B82B1/001B82Y20/00C25D5/54
Inventor 范霞王琴琴
Owner BEIHANG UNIV
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