Preparation method of super-hydrophobic/super-hydrophilic mixed-pattern microarray dendritic gold chip
A mixed-pattern and dendritic technology, which is applied in the field of electrochemistry and nano-film materials, can solve the problems of inability to condense droplets and limit the detection of ultra-low concentration of samples, and achieve good droplet management capabilities, simple and pollution-free methods, and high efficiency. high effect
Active Publication Date: 2020-01-21
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
[0004] However, gold nanochips are usually hydrophilic, which makes the sample droplets drop on the surface of the chip to quickly diffuse in various regions of the substrate material, and cannot condense the droplets, which largely limits the ultra-low concentration of the sample. detection
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[0028] This example is used to illustrate the preparation method and morphology analysis of the superhydrophobic / superhydrophilic mixed pattern microarray dendritic gold chip.
[0029] (1) Ultrasonically clean the pre-cut ITO conductive glass with analytical pure acetone, analytical pure ethanol and secondary water for 3 minutes respectively, and dry in a 50°C oven; place the clean ITO after drying in mercaptosilane Soak in ethanol solution, rinse with analytical pure ethanol and secondary water, dry in an oven at 50°C, and set aside.
[0030] (2) Add 1mol / L of HNO 3 aqueous solution with 1% HAuCl 4 The aqueous solution is uniformly mixed according to a volume ratio of 9:1 to obtain an electrodeposition solution. Use ITO, platinum sheet electrode, and silver silver chloride electrode as working electrode, counter electrode, and reference electrode respectively, place them in the above-mentioned electrodeposition solution, use horizontal voltage deposition method, the deposit...
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Abstract
The invention discloses a preparation method of a super-hydrophobic / super-hydrophilic mixed-pattern microarray dendritic gold chip. The method comprises the following steps: firstly, carrying out sulfydryl silanization treatment on an ITO surface so as to increase the adhesion of the ITO surface to Au nanoparticles; then depositing nanogold with dendritic crystal morphology on an ITO electrode byutilizing a constant-voltage deposition technology; then reacting in a constant-temperature drying oven at 150 DEG C for 3 hours to convert the wet state of the surface of the dendritic gold ITO intoa super-hydrophobic state from a hydrophilic state; and finally, etching eight micro-array circular holes with super-hydrophilic edges on the super-hydrophobic surface through a laser etching technology to obtain the super-hydrophobic / super-hydrophilic mixed pattern microarray dendritic gold chip. The method is simple in preparation process and low in cost, the prepared chip has the micro-dropletenrichment capacity, and the obtained dendritic gold is clean in surface and free of pollution and has wide application prospects in the fields of biological analysis and surface Raman enhancement.
Description
technical field [0001] The invention belongs to the field of nanometer thin film materials and the field of electrochemistry, in particular to a preparation method of a superhydrophobic / superhydrophilic mixed pattern microarray dendritic gold chip. Background technique [0002] In recent years, due to its special physical, chemical, and biocompatibility, gold nanoparticles have broad application prospects in the fields of optics, electronics, surface Raman enhancement, biosensing, and self-cleaning, and have attracted great attention. However, the properties of gold nanoparticles are highly dependent on its size, shape and structure. Gold nanoparticles with different shapes have different functions. Therefore, it is necessary to control the synthesis of gold nanoparticles with different shapes. However, due to the small surface energy difference between different surfaces of gold nanoparticles, the small energy barriers of different shapes can be overcome by fine-tuning the ...
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Login to View More IPC IPC(8): B01L3/00B81C1/00B82Y30/00B82Y40/00
CPCB01L3/5027B01L3/502707B81C1/00373B81C1/00531B82Y30/00B82Y40/00
Inventor 潘宏程郭垠陈雯
Owner GUILIN UNIVERSITY OF TECHNOLOGY