Haider Ali

5 Questions 1 Answers 0 Followers

Questions related from Haider Ali

In transmission spectra, the basic reason behind the red shift of doped manganese doped MgAl2O4 samples?

Manganese was doped upto 1% in MgAl2O4 spinel. As doping concentration increase,I found a gradual red shift in the transmission spectra. what is the basic cause of red shift?

07 July 2019 2,953 3 View

When doping is less than 5%.How XRD patterns confirm doping concentration is increasing ? How to cofirm doping is interstitial or substitutional?

I have done XRD of my sample Mn doped MgAl2O4. Doping concentration was very low ( less than 5%). Now how XRD pattern will detect the doping ratio whether it is decreasing or increasing, as there...

09 September 2018 8,377 8 View

How to find allowed reflections for XRD in SC, FCC BCC &DC??

Which method is used for finding allowed reflections??

01 January 2018 5,507 2 View

What is the main difference between FTIR and Absorption spectroscopy?

what is the basic principle on which we use, to identify the crystal/powder's chemical properties or existence/doping of specific metal? and how to differentiate between both spectroscopies?

01 January 2018 1,917 7 View

How n why water molecules are present still at 710 or 900 C ,as we see water molecules viberations in FTIR ?

when we heat up sample power or gel up-to (710-900) degree Celsius, results performed by FTIR, result shows water molecules vibrations v(O-H) and sigma(OH) etc. this is very surprising for me. why...

01 January 2018 732 3 View