Mehedi Hassan

5 Questions 4 Answers 0 Followers

Questions related from Mehedi Hassan

Raman mode found at 641 cm-1 in ZnO: Which type of mode is this?

I have deposited ZnO and Cr doped ZnO thin films on an Al2O3 substrate by RF sputtering. In both films I have found a Raman mode at 641 cm-1 for ZnO and 644 cm-1 for Cr doped ZnO. I can not...

07 April 2014 7,958 1 View

What is the origin of retarding force in grain growth? Is it electrostatic, entropic, or any other?

In ZnO when the moving grain boundaries fixed on the zinc interstitial and substituted by dopants, they will apply a retarding force on the boundaries. If the retarding force is more than the...

15 June 2013 5,775 1 View

Our AFM does not seem to be working.

We have an AFM/STM from Veeco. It was working fine but a few days ago we purchased a vibration proof table for it. When it was installed the AFM did not working. It shows a message saying "Invalid...

22 March 2013 5,650 5 View

We have to purchase an instrument for calculating thermoelectric power. Can anyone suggest a company with a model no.?

Thermoelectric power

03 February 2013 2,818 5 View

How to make the target materials for metal (Fe, Cr, Sn, Co) doped ZnO thin films by RF Sputtering?

Thin Films by RF Sputtering

29 November 2012 7,089 7 View