Graphene and metal nanoparticle composite film preparation method

A technology of metal nanoparticles and graphene films, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve problems unfavorable to the sustainable development of the photovoltaic industry, and achieve the expansion of usage and industry globalization prospects, diversification of preparation methods, and reduction of preparation costs

Active Publication Date: 2012-09-12
SOUTHEAST UNIV
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  • Abstract
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  • Claims
  • Application Information

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Benefits of technology

Inventions have been developed over past years but they still suffer problems such as low efficiency due to long processing times needed before obtaining desired materials on specific areas. These technical improvements include improved production processes and increased product quality while reducing manufacturing cost. Additionally, there are various ways to make these composites into useful products like sensors or electronic devices.

Problems solved by technology

This patented problem addressed in this patents relates to improving the performance and functionality of nanoelectronics for use in various applications including sensing, imaging, optoelectric conversion, energy storage, and biosensors. These new technologies require precise placement of metallic particles near them which affects how they behave differently depending upon external stimuli like laser irradiation or sunlight exposure. To address this issue, there exists an urgent demand for developing techniques capable of controllably attaching minute distances between different types of nanopartns without compromising their original function.

Method used

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  • Graphene and metal nanoparticle composite film preparation method
  • Graphene and metal nanoparticle composite film preparation method
  • Graphene and metal nanoparticle composite film preparation method

Examples

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Embodiment 1

[0036] Graphene prepared by chemical vapor deposition and transferred to quartz substrates

[0037] First, put the cleaned 50 micron copper foil horizontally into a vacuum tube furnace, and heat the tube furnace from 30°C to 1000°C for 70 minutes. Then, 40 ml / min of argon and 40 ml / min of hydrogen were introduced as a protective atmosphere. Insulate at 1000°C for 30 minutes. Then feed 10 ml / min of methane and 30 ml / min of hydrogen into the tube furnace, and adjust the pressure to 130 Pa. The time is 10 minutes. Decline to room temperature with 15 DEG C per minute afterwards, complete the growth of graphene thin film 1. Graphene microstructure diagram see figure 2 . After the growth is completed, the graphene obtained by the growth is spin-coated with a layer of polymethyl methacrylate organic solvent, and then placed on a heating table at 120 ° C for 2 minutes. Then put in 0.5 moles per liter of ammonium persulfate solution Corrosion removes copper. After that, the poly...

Embodiment 2

[0039] Fabrication of Metal Nanoparticle Thin Films by Electrophoresis

[0040] First in 7.5 milliliters concentration is the hexadecyltrimethylammonium bromide of 0.1 mole per liter, add 0.25 milliliter concentration and be the auric acid solution of 0.01 mole per liter, then add 0.6 milliliter concentration and be 0.01 mole per liter of hydroboration The sodium solution forms a gold seed solution. In the beaker, add 38 milliliters of ionized water, 8 milliliters of concentration of 0.1 moles per liter of hexadecyltrimethylammonium bromide, 1 milliliter of auric acid of 0.01 moles per liter, 3 milliliters of 0.01 moles of per liter of 1 liter of ascorbic acid to form a growth solution, and then 10 microliters of the gold seed solution was dropped into the above growth solution and stirred, and the gold nanoparticles 21 and the solution 22 were grown to obtain gold nanoparticles. Graphene / quartz substrate composite thin film 23 is used as the negative pole of DC electrode in ...

Embodiment 3

[0042] Fabrication of Metal Nanoparticle Thin Films by Vacuum Evaporation

[0043] Adopt vacuum evaporation method to prepare a layer of 1 to 20 nanometer thick gold nano film 26 on the surface of graphene film and quartz substrate composite film 23, and obtain gold by annealing at a high temperature of 450 ° C for 30 minutes in a nitrogen or hydrogen furnace. Nanoparticles 21, completing the preparation of the first metal nanoparticle film layer.

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Abstract

The invention relates to a graphene and metal nanoparticle composite film preparation method. The graphene and metal nanoparticle composite film mainly comprises a first graphene film layer (1), a second graphene film layer (3), a third graphene film layer (5), a first metal nanoparticle film layer (2) and a second metal nanoparticle film layer (4). The graphene film layers and the metal nanoparticle film layers are overlapped alternatively to form the graphene and metal nanoparticle composite film and then are composited with a base material (6) into a whole serving as a molecular Raman signal detection substrate or a transparent efficacy-enhancement solar cell electrode. The graphene and metal nanoparticle composite film has characteristics of transparency, conductivity, surface plasma enhancement and the like, can be used as the molecular signal detection substrate or the transparent solar cell electrode having a trapping effect, and is expected to be applied to surface Raman scattering enhancement, photovoltaic efficacy enhancement or other related fields widely.

Description

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Claims

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Application Information

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Owner SOUTHEAST UNIV
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