Masoud Berahman

7 Questions 17 Answers 0 Followers

Questions related from Masoud Berahman

How good a raspberry pi based cluster works for simulation compare with simple core i7 computer?

Hi, I want to setup a 4 nodes (each one with 4 cores) Raspberry pi cluster and install quantum espresso on it for simulations. Does anyone know how good it works compare with core i7 PC computer...

12 December 2017 5,074 7 View

How the gap opening in 1D metals due to Peierls transition would happen ?

hi everyone, I read some notes on peierls transition ( for instance: PHYSICAL REVIEW B 77, 165135, 2008). It is mentioned that : " Peierls was the first to point out that such a system is formally...

06 June 2017 5,119 0 View

Is there any commercial device with comb shape electrodes ?

Hi everyone, I wonder if anyone knows of any commercial cheap devices that contain comb-shape electrodes with almost 10um separation that I can use for my works? Another point is that If anyone...

01 January 2017 9,012 2 View

Any reason for odd behavior of pt electrodes in sputtering deposition?

Hi all, I deposit 500nm of pt electrode on alumina using sputtering deposition. In very bizarre happening, the pt in each electrode show 1MOhm resistance! when i anneal the system up to 600degree...

01 January 2016 7,778 5 View

How completely dry CNT?

Hi everyone, I disperse MWCNT(200mg) in 30mlit H2SO4/HNO3(3:1) solution to form defects on it. After sonication for couple of hour, I add DI water to it and immediately pour it on paper filter....

01 January 2016 8,725 3 View

How should I choose a proper heater for substrate heating in vacuum?

Hi I want to heat my substrate up to 400C in vacuum around 5E-4 Torr and in argon gas in 5E-2Torr. What are the characteristics of heater that I should consider in these pressures? What are good...

10 October 2015 8,044 15 View

Uv-Vis spectrum of single wall carbon nanotube?

I dispersed 0.2mg/milt SWNT 95% purity (1-2nm OD) in 2% SDS and sonicated for 2h using tip type sonicator with 2W power and 70% cycle. I use a sample of it for Uv-Vis spectroscopy. The result is...

10 October 2013 9,227 9 View