Am modifing the surface of the nanomaterial with SiO2 nanospheres, here I found that nanmaterial excites at 350nm, emission at 450nm and after surface modification with SiO2 excitaion changes to 310nm, emission at 470nm is that ok if excitaion changes toxcitaion wavelngh before and after surface modification .
Thank you
Dear colleague Lingaraj Ryavanaki,
Have a nice time and good day.
The absorption edge occurs at different wave lengths depending on the structure, the surface modifications may introduces dangling bonds or localized states through the gap so the absorption edge or excitation may be occurs at different energies (wavelengths) the value of the the absorption edge energy or excitation depends on the electronic type direct or indirect, the direct energy gap always larger then the indirect one.
I wisg this is useful and help you.
Yours
A. El-Denglawey
Denglawey many thanks for your answer and also I wish the same for you
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