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Method for preparing diamond-like composite film containing gold nanoparticles

A gold nanoparticle and composite thin film technology, applied in electrolytic inorganic material coating, electrolytic coating, coating and other directions, can solve the problems of harsh conditions, limited types of doping elements, expensive vapor deposition equipment, etc. The effect of good experimental controllability, simple equipment and process

Inactive Publication Date: 2008-06-25
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of DLN thin films is still focused on vapor deposition technology. Due to the expensive vapor deposition equipment, harsh conditions, and limited types of doping elements, these factors seriously restrict the further development and application of DLN thin films.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First, prepare chloroauric acid and sodium citrate solutions with molar concentrations of 1mM and 38.8mM respectively, then add 250ml of chloroauric acid solution into a 500ml round bottom flask, heat to reflux until boiling, and vigorously stir at the same time, then quickly pour into the bottle 25ml of sodium citrate solution. At this time, the color of the reaction solution changed from light yellow to wine red. Continue boiling for 10 minutes, remove the heat source, continue stirring for 15 minutes, and finally cool to room temperature to obtain a gold nanoparticle sol. Get 10ml of gold nanoparticle sol, centrifuge out gold nanoparticles and ultrasonically disperse in 100ml of methanol (the molar concentration of gold nanoparticles in methanol is 0.1mM at this time), the solution is poured into the electrolytic reactor, and heated by adjusting the water bath The temperature of the electrolyte was kept constant at 50 °C. The pre-cleaned single crystal silicon wafer ...

Embodiment 2

[0023] Prepare a methanol solution of gold nanoparticles with a molar concentration of 0.9mM, place the prepared solution in an electrolytic reactor, adjust the temperature of the electrolyte at 30°C, clamp a stainless steel sheet on a graphite sheet as the cathode, and graphite as the anode, using direct current A high voltage of 900V was applied while stirring, and deposited for 9 hours to obtain a diamond-like carbon composite film containing gold nanoparticles.

Embodiment 3

[0025] The conductive substrate was changed to a titanium alloy sheet, and the others were the same as in Example 1 to obtain a diamond-like carbon composite film containing gold nanoparticles.

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Abstract

The invention relates to a preparing method of a diamond-like carbon composite film with gold nano particles. Methanol solution with gold nano particles is selected as deposit liquid; a method of electrochemical deposition is adopted; graphite is used as anode, and a conductive substrate is used as cathode; the diamond-like carbon composite film with gold nano particles is received deposited and obtained on the cathode through direct current high voltage and stirring effect. The invention has the characteristics that the equipment is simple, the temperature of deposition is low, the film is formed evenly, common deposition of nano particles and DLC film is fulfilled, and the nano particles can be evenly scattered in carbon substrate of the film.

Description

technical field [0001] The invention relates to a preparation method of a diamond-like composite film containing gold nanoparticles. technical background [0002] Diamond-like carbon (DLC) film has excellent characteristics such as extremely high hardness, excellent chemical inertness, extremely low friction coefficient, excellent wear resistance and good thermal conductivity, etc. It has broad application prospects in the fields of science, aerospace and so on. However, as a new type of hard lubricating functional thin film material, DLC film will have a large internal stress during the vapor deposition process, resulting in poor adhesion to the film base, which limits its compatibility with a variety of metal substrates (especially The combination of titanium alloy and aluminum alloy material) has seriously affected the practical application of thin films. Nanocomposite films and metal or non-metallic doping are commonly used methods to reduce internal stress and improve...

Claims

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Application Information

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IPC IPC(8): C25D15/00C25D9/08
Inventor 杨生荣陈刚张俊彦
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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