Rajib Kar

6 Questions 26 Answers 0 Followers

Questions related from Rajib Kar

Whenever we take optical emission spectrum of 13.56 MHz RF plasma, the spectrum gives huge noise especially between 200 - 500 nm. Why ?

We are doing optical emission spectroscopy of different atmospheric pressure non-thermal plasma for identification of different species. We have witnessed that when we are taking spectrum of a...

16 April 2020 5,582 9 View

Problems in understanding HRTEM image of Carbon nanowall (CNWs) / Vertical graphene nanosheets(VGNs)?

Please see the attached HRTEM and corresponding FFT images of my CNW / VGN sample. I am getting an interlayer spacing of 0.22 nm from ImageJ while strongest spots in FFT gives me 0.33 nm/Cycles....

24 July 2018 5,845 4 View

Problem in band identification in plasma etching experiments with a mixture of Ar/CF4 plasma and Ar/CF4/O2 plasma.

I was doing these experiments for a comparative study and ended up getting spectrum like the two I have attached. The big problem is that I can not identify the bands with head at 530 nm and 365.8...

07 June 2017 7,702 2 View

An approximate idea about plasma sheath electric field variation?

I am working with a 2.45 GHz microwave ECR plasma. I have done Lanmuir probe diagnostics in this plasma and have deposited some carbon nanostructures using it. Now I want to co relate these...

10 December 2013 2,280 3 View

Problems in understanding optical emission spectrum of CF4+ Ar plasma?

We are recently working with a plasma mixture of argon and CF4 gases produced in atmospheric pressure by microwave plasma torch. We are doing optical emission spectroscopy (OES) of this plasma....

14 November 2013 3,049 8 View

I want to measure growth rate of MWCNT grown by PECVD?

I have grown MWCNT on Inconel 600 via PECVD. The growth is lateral and quite random in nature. Please see the attached SEM image (for an idea). How can I find out growth rate for it? As I...

06 November 2013 1,221 14 View