venkatesha babu kr rathnaiah setty

Government Science College, Bangalore · Department of Physics

The intensity of one of the Raman peaks (noticed at the wavenumber 141) decreases with rise in the concentration of the dopant in the TiO2 host. May i know the reason for the same. The fall is noticed due to the addition of dopant.

help me

May i know the properties which enhances the Photo luminescence of the rare earth doped oxide materials.

With increase of concentration of the dopant in the host,...the Band Gap energy of the nanostructure is increasing..may i know the reason..

with the increase in the concentration of the dopant,..the PXRD reveals the dopant peak also..what does it mean..is PXRD peak indicates that dopant is not fit in the host or is it a impurity..or doping is not done..

I request you to do the needful...

With increase of concentration of the dopant in the host,...the Band Gap energy of the nanostructure is increasing..may i know the reason..

with the increase in the concentration of the dopant,..the PXRD reveals the dopant peak also..what does it mean..is PXRD peak indicates that dopant is not fit in the host or is it a impurity..or doping is not done..

I request you to do the needful...

I need to find the half life of sodium using GM counter..If any one is aware of doing it I request you to give me the link or method to follows..We do characteristic, bremstrauhlug, statistics, endpoint energy apart from these any other experiments can we do with gm counter...

regards

venkatesha babu kr

TiO2 is doped with Ce3+.  the emission wavelengths are found to be 489, 542,653,705,730nm.  could any one give the transitions states pertaining to the mentioned wavelengths...(excitation wavelength is given by 396nm)

why refractive index decreases and band gap energy increases with the dopant concentration of nano structure...Plz give the reason for same...

i need to synthesise the nano particles by solution combustion synthesis...any papers relevant to this..kindly share..

I need to dope TiO2 to study the white LED applications..i request you to do the needful..And also what properties of the material should be focused..??

In the combustion synthesis of nano materials urea is used as fuel.  The stoichiometry relations demands to find the valence of urea because F/O=1. Hence i request kindly guide me to find the urea valence? OR

how much of urea(fuel) is required to synthesis nano power TiO2 from Titanyl nitrate TiO(NO3)2(oxidiser) by solution combustion synthesis.

How can I obtain TiO2

How can I obtain TiO2 nano particles from green extract?

I am interested to synthesize TiO2 nano particles from green extract. I request you to give the suggestions, references plz if any

I am purely nuclear physics teacher...I need more chemistry to prepare the Nano materials. Kindly help me to

How to prepare the TiO2  nano material using the main precursor as Titanium(IV) butoxide (MW=340.32g/mol)sigma product no 244112) a) combustion method b)  sol gel method c) the chemical reaction in both combustion and sol gel process...thanks a lot

I need to calculate the concentration for dopant with another material. Can anyone help me out to learn the calculations? How can I calculate the 0.1mol% of Europium Nitrate with TiO2 material? Thanks a lot

People usually ask direct and indirect band difference.  Most of the answers are in terms of election transition.  Here my question is different in the sense that OPTICAL direct and indirect band gaps?