Most of the literature deals with synthesizing the np in surfactant and then spin coating it. As I need to spin coat commercially purchased np (50 nm), you experience/suggestions would be much helpful. Thanks in advance.
Disperse the CuO nanoparticles in ethanol to form a stable suspension (0.1 wt%). Then spin coat this solution.
If the CuO is in powdered form then it can't be dispersed to 50 nm or so....
@chandra Thanks, I have tried with ethanol , it is not producing good film and the dispersion is not stable. Can you share your experimental conditions?
@Alan Thanks. the CuO is in powder form. Do you think even with surfactants I can not disperse CuO? Can you think of any other means to coat the CuO powder on substrate?
@ Subash You have a collection of post- and sub-micron fused particles in your CuO. See (open in IE):
Nov 11th, 2008. Dispersion and nanotechnology http://tinyurl.com/hpywsge
The only dispersing agent is energy - surfactants wet a surface. And alcohol will wet your material well. The issue is separation in the 3 stages of making a stable dispersion (wetting-separation-stabilization).
Simply you'll get a messy mass of material on your substrate. You need to make your CuO from a bottom-up process such as sol-gel, spin and fire it onto your substrate. Your material needs to be in colloidal suspension to begin with, not in a powder.
Spincoating is used to make films of material not discrete nanoparticles on a surface.
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