Originally Posted by knsanthosh

Qualitative test for particle size of nano particles

While nano particle's synthesis /research I have been facing a problem.Since I do not have particle size analyser/SEM/TEM etc my own , is there any qualitative method to find out my product 's particle size like whether it is nano or micron partilce?

please suggest a simple method

I suggest that you investigate uv-vis spectroscopy. The instrumentation for this is relatively cheap in comparison with other methods.

For example:

http://nanocomposix.com/sites/defaul...20Analysis.pdf ■

Originally Posted by knsanthosh

Qualitative test for particle size of nano particles

While nano particle's synthesis /research I have been facing a problem.Since I do not have particle size analyser/SEM/TEM etc my own , is there any qualitative method to find out my product 's particle size like whether it is nano or micron partilce?

please suggest a simple method

Dear knsanthosh,

for characteriasation the paticle size of your material there are different methods possible. Important is the qualitative knowledge about your powder.

If you have a mixture of some materials ofen the static laser diffraction is used for measuring particle size distribution, but you havent the optical properties refractife index and absorption at specific wavelenght of laserlightsource. So only analysis according Fraunhofer algorithmus is possible an lower limit of measured size is one µm or two µm Particle size..

If you have pure powder with refractive index and absorption value, modern static Laserscattering instruments are able to measure <100nm. So you may had an evidence about occuring dimension of particles. But Note: Static Laserscattering is an indirect method and you are may measuring a distribution of agglomerates. The result is depending on dispersion method. For Particles <30 nm you may need further technics

Other ways for pure materials characterisation is dynamic light scattering DLS and Disc Centrifuge.

Characterising nanoparticles in a powder mixture is very difficult. You may need a REM and a good preparation method for a first qualitative verification.

For further information visit and contact http://www.Pulveranalyse.de. ■