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Supporting membrane of transmission electron microscope sample and manufacturing method for transmission electron microscope sample

A technology of electron microscope and manufacturing method, applied in the manufacture of discharge tubes/lamps, electrode system manufacturing, circuits, etc., can solve the problems that restrict the use of support films, and achieve the effects of strong practical application value, thin thickness, and strong mechanical strength

Inactive Publication Date: 2011-08-03
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These factors restrict the use of supported membranes to a certain extent

Method used

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  • Supporting membrane of transmission electron microscope sample and manufacturing method for transmission electron microscope sample
  • Supporting membrane of transmission electron microscope sample and manufacturing method for transmission electron microscope sample
  • Supporting membrane of transmission electron microscope sample and manufacturing method for transmission electron microscope sample

Examples

Experimental program
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Embodiment Construction

[0031] 1. Preparation of monolayer graphene oxide sample support film

[0032] 1.1 Synthesis of graphene oxide

[0033] 1.1.1 Oxidation of graphite

[0034] The oxidation of graphite adopts the modified Hummers method. In order to ensure that the obtained graphene oxide maintains a certain electrical conductivity, the oxidation process is limited within two days. Graphite as a raw material is a 325-mesh powder with a purity of 99.9995%, purchased from Alfa Aesar, and chemical reagents such as potassium permanganate, sodium nitrate, concentrated sulfuric acid, hydrochloric acid, and hydrogen peroxide were purchased from Nanjing Chemical Reagent Company.

[0035] Take 2g of graphite powder, mix it with 3.75g of sodium nitrate and place it in a large beaker; install an electric stirrer, and keep the stirrer working continuously throughout the oxidation process. Slowly pour 170mL of concentrated sulfuric acid into it, and keep stirring for 2 hours to make the reagents mix evenly...

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Abstract

The invention relates to a supporting membrane of a transmission electron microscope sample and a manufacturing method for the transmission electron microscope sample. The supporting membrane of the transmission electron microscope sample consists of a porous micro-gate supporting membrane substrate and a single-layer graphene oxide film which covers the substrate, wherein the coverage density ofthe single-layer graphene oxide film on porous micro-gate is 0.7*10<-6>-14*10<-6> mg / mm<2>, 0.7*10<-6>-3.5*10<-6> mg / mm<2> preferably. The single-layer graphene oxide film can serve as a carrying membrane of the transmission electron microscope sample to manufacture the transmission electron microscope sample. The invention has the advantages that: the novel supporting membrane of the transmission electron microscope sample is designed and prepared; compared with the conventional carbon supporting membrane, the supporting membrane is smaller in thickness, stronger in mechanism strength and better in material dispersion effect; and the supporting membrane is used for carrying a material which is observed by a transmission electron microscope, so that higher resolution and higher definitioncan be obtained.

Description

technical field [0001] The invention relates to a preparation method of a transmission electron microscope sample supporting film and a transmission electron microscope sample. Background technique [0002] Transmission electron microscopy has been widely used in nanoscience and nanotechnology. In order to obtain a perfect TEM photo, in addition to requiring a TEM instrument with good function and condition, it is very important to prepare a high-quality TEM sample. Samples for transmission electron microscopy are generally prepared by mounting the material to be observed on a standard "transmission electron microscope sample support film". There are many kinds of TEM sample support membranes available on the market at present, and different choices need to be made according to different materials. Generally speaking, the thickness of the support membrane, the hydrophilic and hydrophobic properties of the surface, whether it will react with the material to be tested or cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J37/20H01J9/00
Inventor 元冰马余强
Owner NANJING UNIV
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