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Light-operated micron motor based on TiO2 bicrystal phase micron particles, and preparation and control of light-operated micron motor

A micro-particle and micro-motor technology, applied in the field of light-controlled micro-motors, can solve the problems of complex external fields, hinder the preparation and application of micro-nano motors, and achieve the effects of low preparation cost, simple structure and easy preparation.

Active Publication Date: 2017-08-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing micro-nano motors either have complex asymmetric structures (such as double-sided god structures, multi-layer tubular structures or tank-like structures, etc.), expensive material composition or complicated preparation processes, or require specific complex external fields, This seriously hinders the large-area preparation and application of micro-nano motors

Method used

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  • Light-operated micron motor based on TiO2 bicrystal phase micron particles, and preparation and control of light-operated micron motor
  • Light-operated micron motor based on TiO2 bicrystal phase micron particles, and preparation and control of light-operated micron motor
  • Light-operated micron motor based on TiO2 bicrystal phase micron particles, and preparation and control of light-operated micron motor

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The preparation method of twin-phase spherical titania microparticles:

[0033] Mix 0.1mM NaCl solution, ethanol, and tetrabutyl titanate in sequence at a volume ratio of 1:250:4.25, stir for 18 minutes and then let stand for 24 hours to collect the white precipitate, which is uncrystallized TiO 2 Microspheres;

[0034] The uncrystallized titanium dioxide microsphere powder is placed in a muffle furnace, the calcination temperature is set at 650°C, and the calcination time is set at 120 minutes to obtain twin-phase titanium dioxide microparticles containing both anatase and rutile phases.

Embodiment 2

[0036] The preparation method of twin-phase spherical titania microparticles:

[0037] Mix 0.1mM NaCl solution, ethanol, and tetrabutyl titanate in sequence at a volume ratio of 1:250:4.25, stir for 10 minutes and then let stand for 26 hours to collect the white precipitate, which is uncrystallized TiO 2 Microspheres;

[0038] The uncrystallized titanium dioxide microsphere powder is placed in a muffle furnace, the calcination temperature is set at 600°C, and the calcination time is set at 150min to obtain twin-phase titanium dioxide microparticles containing both anatase and rutile phases.

Embodiment 3

[0040] The preparation method of twin-phase spherical titania microparticles:

[0041] Mix 0.1mM NaCl solution, ethanol, and tetrabutyl titanate in a volume ratio of 1:250:4.25 in sequence, stir for 20 minutes and let stand for 24 hours to collect the white precipitate, which is uncrystallized TiO 2 Microspheres;

[0042] The uncrystallized titanium dioxide microsphere powder is placed in a muffle furnace, the calcination temperature is set at 650°C, and the calcination time is set at 120 minutes to obtain twin-phase titanium dioxide microparticles containing both anatase and rutile phases.

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Abstract

The invention discloses a light-operated micron motor based on TiO2 bicrystal phase micron particles, and preparation and control of the light-operated micron motor. The light-operated micron motor takes the shape of a ball with a diameter from 0.7 to 1.5mu m; the phase composition of the light-operated micron motor contains two crystal phases, namely an anatase crystal phase and a rutile crystal phase, the two crystal phases are in uneven distribution, and crystal particle sizes range from 63 to 645nm; the TiO2 bicrystal phase micron particles are dispersed in hydrogen peroxide solution, under a lighting condition, photo-induced electrons and holes can be separated at heterojunction, nonsymmetrical redox reaction happens on the surfaces of two types of crystal particles, namely the surfaces of anatase crystal particles and the surfaces of rutile crystal particles, and the self driving of particles is realized. According to different energy gaps of the anatase phase and the rutile phase, the light-operated micron motor can enable the electrons and the holes to generate the redox reaction respectively on the surfaces where the electrons and the holes are richly gathered, and self-electrophoresis movement is finally realized. Meanwhile, the micron motor has the advantages that the structure is simple, the preparation is easy, and the preparation cost is low.

Description

technical field [0001] The invention belongs to the technical field of micro-nano motors, and relates to a TiO-based 2 Light-controlled micromotors of bimorph-phase microparticles. Background technique [0002] Micro-nano motors are an important part of micro-nano machines, because of their unique motion characteristics, it is possible to complete the loading, transportation and release of goods in liquid media, so that various complex tasks can be completed, such as: drug delivery, protein and Cell separation, microsurgery and environmental treatment, etc. (Chem. Rev. 2014, 114, 6285; ACS Applied Materials & Interfaces 2014, 6, 9897; Nano Letter 2007, 5; Nanoscale 2013, 5(11): 4696). The essence of self-propelled micro-nano motor drive is to build an asymmetric field, and break its force balance through the asymmetric field to make the micro-nano motor move. At present, the design ideas of micro-nano motors are mainly divided into two categories. One is to construct the m...

Claims

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Application Information

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IPC IPC(8): C01G23/047B81B7/00B82Y40/00
CPCB81B7/00B81B2201/03B82Y40/00C01G23/047C01P2002/72C01P2004/03C01P2004/04
Inventor 牟方志张健华官建国
Owner WUHAN UNIV OF TECH
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