Want to know with insulators that have an energy gap above 4ev, whether they show positive photo conductivity or negative photo conductivity?

More Fayaz Ahmad Najar's questions See All

Gromacs first step of minimization ?

I have face this problem anyone help me how to solve this issue ?which is below Fatal error: There are inconsistent shifts over periodic boundaries in a molecule type consisting of 78 atoms. The...

07 August 2024 2,598 1 View

"A Markov-like Model for Patient Progression"?

A Markov-like Model for Patient Progression" Markov Chain Monte Carlo (MCMC) Markov Chain Monte Carlo (MCMC) is a powerful computational technique used to draw samples from a probability...

05 August 2024 10,079 0 View

Parametrize the residue (DOP) into the an .rtp entry but still did not recognize?

Hello, I have paramterize the residue namely “DOP” into both files of amino acids.rtp and lipids.rtp files of GROMOS96 53a6 force field and charmm27… respectively, although I mentioned the residue...

19 June 2024 7,562 0 View

In case of half metal is it sufficient that either of the spin resolved band should only cross fermi level or they should be continuous across it ?

Do we need either of the bands in spin up or spin down just cross fermi level or the band should be continuous after crossing the fermi level to declare that material as half metal

22 March 2024 4,442 1 View

Equilibration did not reached for 5ns . nstlim is 5millions ?

Hi everyone I try to perform equilibration on my system in AMBER16. I use pmemd.cuda and follow AMBER tutorials. This step is interrupted during execution and remains incomplete. also I have the...

21 March 2024 2,008 0 View

Equilibration did not reached for 5ns . nstlim is 5millions ?

Hi, I have a question I am doing the equilibration but here the problem is that when nstep reaches up to 4 lac, and the simulation cancels. below is the script molecular dynamics run &cntrl...

07 March 2024 5,741 0 View

How can we analyze a ceramic specimen to determine dopants and elements that have very low percentages in the structure?

For example we can find the main phases using XRD, but I wanna know how to find the dopants, sintering aids, etc.

25 February 2024 891 3 View

What is the reason for my failure in the production of hollow nanofibers?

Hello. I am making hollow nanofibers using electrospinning technique and coaxial needle. My efforts have not been successful so far. I use PVA polymer for the shell and mineral oil for the...

22 February 2024 3,064 0 View

What is the environmental impact of urea?

14 January 2024 6,210 3 View

Does manufacture of urea cause global warming?

14 January 2024 5,168 2 View

I have get this error when i calculated the geometrical optimization for prco3, it takes 12 hours until gives this message in the outputfile?

Fatal error in MPI_Allreduce: Other MPI error, error stack: MPI_Allreduce(1628)......: MPI_Allreduce(sbuf=000002459254A180, rbuf=000002459F86A140, count=4851, MPI_DOUBLE_COMPLEX, MPI_SUM,...

09 August 2024 7,615 1 View

1. If I can quantize the atom using this hyperbolic spiral and classical physics, could nature do the same?

If we map as a continuous motion an ionising electron (beginning its journey at n=1) in an H atom, a specific hyperbolic spiral appears (see animation). When we solve this spiral formula, we find...

07 August 2024 5,343 2 View

How are iso-frequency contours plotted?

Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...

07 August 2024 1,937 1 View

What is the prepared reference material that can be used in inductively coupled plasma optical emission spectrometry (ICP-OES) to measure REE and U ?

What is the prepared reference material that can be used in the ICPE-9820 Shimadzu Japan instrument, which employs inductively coupled plasma optical emission spectrometry (ICP-OES) to measure...

06 August 2024 1,896 1 View

How effective is the Citi Bloc standard basket in enhancing the accuracy and comparability of international construction cost assessments?

Citi BLOC Standard Basket Definitions: A standardized unit representing a fixed basket of construction materials, labor, and equipment costs priced in various cities. Purpose: To create a common...

04 August 2024 8,997 1 View

¿Are oxygen vacancies in semiconductors capable to change the band gap?

Dear all! Oxygen vacancies do raise negatively the Fermi level by increasing the negative charge in the semiconductor crystal structure. In the case of n-type semiconductors, I wonder if this...

30 July 2024 8,339 2 View

How to build my own lab made four point probe set up?

Hello, I'm trying to measure the conductivity of semiconductor films but since I don't have a commercial four point probe set up I would like to build one on my own in my lab. I have generators,...

30 July 2024 906 2 View

How to calculate conductivity using Electrochemical Impedance Spectroscopy's Nyquist plot?

Hello everyone, I am new to this characterization but watching videos on youtube I have already plotted a Nyquist plot (Z' and -Z'') and already fitted models on my material using Zsim. But now I...

29 July 2024 1,376 0 View

May I know the exact Quartile of the journal- Advanced Engineering Materials (Wiley) for material science category?

In some data sources it has been grouped in Q1 and some shows it is Q2.

29 July 2024 4,227 2 View

Can we eliminate the stress singularity at the tip of the crack by manipulating the elastic constants?

The aim of the research here is to prevent the propagation of the crack in the fabricated elastic medium with useful applications.

25 July 2024 9,976 3 View

Mohan Kumaraswamy

Photons are absorbed only when their energy is equivalent to the band gap energy. I am not sure whether we have such high energy photons to show even some change. Generally semiconductors would have some band gaps of around 0.6 to

Fayaz Ahmad Najar

i mean in insulators of optical band gap 4.49 eV after applying votage in presence of halogen lump whether they show positive or negative conductivity ? after ploting graph between voltage and current.....................