All suggested ways are efficient. however, don't forget that remaining the NPs on the surface might be a problem. So you need to precisely investigate the interaction of substrate surface and the NPs.
Also you can try dry spraying in a chamber to prevent air convection flow.
Are those metal nanoparticles? Are you trying to deposit those on glass slide? Different material particle surfaces have different properties and hence strategies are required accordingly to be modified.
Sparse colloidal lithography would be an option. The idea is to deposit a/several layers of polyelectrolytes on your surface (PDDA, PSS and PAX are quite common, but there are many more), such that the charge on the surface is opposite to the charge on the particles. After coating the surface you then deposit the particles which will be attracted to the surface due to opposite charges but will still repel each other as they have the same charge. This is quite a common method to use for instance with polystyrene particles (size range from bellow 100 nm to micron) and as far as I know it has been successfully used with silica nanoparticles and also gold nanoparticles (and perhaps others that I am not aware of).
It would be useful to have some more information about what you want to do (what particles do you want to deposit and on what surface, for instance)
You can use any physical vapor or chemical vapor deposition to grow nanometer thickness film. Spin, dip or thermal/plasma spay can be used to deposit thick coating. By the way your question need to be more specific.
Thanks Saleem. I just want to introduce some particles on substrate like silicon and plastic plate, forming dusty interfaces. Particles on the substrate are weekly agglomerated and in powder form.
Which material? Electrochemistry is a strong tool, by variing the deposition method, overvoltage, current density etc the particle size is for some materials adjustable.
Recently, electroanalytical techniques are playing a great role in surface deposition. So, better to consult any friend who is working in electrochemistry. I hope you will get solid information and you will realize the beauty of electro analytical techniques.
For sensor applications drop coating method is preferable.
This is a simple method nano powder is dispersed in water and made like a paste and coated on the alumina substrate and dried at 120 degree Celsius for few minutes. Now deposited nano powder is ready for required applications also use pt interdigitated electrodes for further studies
For uniform distribution spin coating, dip coating is depends on what surface of substrate, drop casting also better method but we will not uniform distribution.
The deposition process depends upon the material and the substrate. Spin coating and drop casting are simple techniques for coating. Substrate surface needs to be cleaned prior to coating. Uniformity of deposited film is an issue with drop casting. Spray coating is also an option.
In my case, using 100 nm PS on ITO substrate, drop-casting is the simplest methods, however the solvent ratio adjustment (DI water:ethanol) should be carefully controlled to get a uniform coverage.