I have prepared nanoparticles using laser ablation method.I have shined Nd: YAG laser (532nm) for 40 minutes and used different liquids(acetone,ethanol and methanol) at 30 and 60 mJ laser energy. My SEM result shows that with the increase of laser energy the particles size increases. My Uv absorbance result shows blue shift with the increase of energy in case of ethanol and acetone. I am attaching my results.Kindly let me know if i am not analyzing it properly...Ethanol and acetone respectively
Hi
in spectroscopy of Nano particles the size of particles and the medium have a key role.
if your particles have large size then you have red shift and for smaller one there is a blue shift. take into account that this phenomena take place for particle with same material.
the ambient have similar role in blue or red shifting of spectrum.because the modes are very sensitive to ambient material and refractive index
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