Bappaditya Pal

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Questions related from Bappaditya Pal

Can we consider the absorption-edge of UV-VIS absorption spectra as band gap energy in case of nanoparticles or nanostructures?

Generally we can calculate band gap from UV-Vis spectroscopy using Tauc Plots. (ahv)1/2 Vs hv. a (alpha), absorbance. But for nanostructures it can be around the same energy value as obtained from...

05 May 2014 2,591 10 View

How can we measure and show the presence of spin polarized carriers in the magnetic semiconducting materials?

In general if we can produce a good quality magnetic semiconducting material (Like Nanorods, Nanoparticles or a Thin film) by doping TM(Mn, Co, Ni) in a semiconducting host(ZnO, TiO2, GaN) system...

05 May 2014 6,232 7 View

Which one might play a better role (better candidate) among the Transitional Metals (TM) to produce RT Ferromagnetism in TM doped ZnO and other DMSs?

For ZnO and other oxides Co have been tried by the maximum no. of researchers, while Mn is preferred mostly for the III-V semiconductor like GaAs, InAs etc. Please, provide advantages as well as...

08 August 2013 7,865 3 View

Does anyone have experience with feromagnetism in TM (Co, Ni) doped ZnO nanostructures and other Diluted Magnetic Semiconductor Oxides?

Can anybody provide ideas about the specific experiments to support or identify the nature of magnetic interaction and required model to explain the ferromagnetic behavior in these materials? The...

08 August 2013 1,065 18 View