Direct and indirect band gap energies?

Is it possible for a semiconductor to have both direct and indirect optical band gaps? can an indirect band gap energy be smaller than that of direct band gap?

07 August 2017 7,936 4 View

Methylsilanetriol or potassium salt of the material synthesis method. Who can give me data about the synthesis of methyl silanetriol or K3(CH3SiO3)?

Who can give me data about the synthesis of methyl silanetriol or K3(CH3SiO3)?

11 December 2016 8,081 2 View

How can i use tio2 nanoparticle as an additive to paint for anti pollution application?

11 December 2016 8,592 6 View

How can I calculate band gap using UV-Vis DRS spectrum?

09 October 2015 9,276 7 View

What is Rf in fullprof program?

09 October 2015 2,347 0 View

Can anyone help me to determine the crystal structure of a compound Bi2Mn2O7 via reitveld analysis? I attached a PXRD file (txt)

I have used a reference from Abdul halim shaari

06 July 2014 1,392 22 View

How can I characterize an unknown PXRD pattern when there is no reference according to it?

The peaks are sharp and the baseline is good.

02 March 2014 8,444 3 View

How do you write a simplified C block code of this average-current control on PSIM?

This is a Buck (step-down) Converter and I am new to this program. I need to program with simplified C block and I actually don't know what to do. Can anyone show me how to do this? Or at least...

02 March 2021 8,233 1 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

Do you know good and user-friendly programs to measure plant quantitative traits?

For my research i will need to measure plant quantitative traits (especially leaves area and roots length, but would be nice to add some more information). I recently discovered...

01 March 2021 5,035 2 View

Does anyone have a recommendation for yeast reporter gene plasmid/protocol?

Hi, could anyone recommend a plasmid and/or protocol for reporter gene assay in S. cerevisiae? I want to assess the effect of growth conditions on a transcription factor, so I want to clone it`s...

01 March 2021 210 1 View

What is the most suitable server for predicting protein structures in bacteria?

I have used the i-Tasser several times, however it has been unavailable for several days. I tried the swiss-model, but the output was not very pleasant due to the model used. Is there any other...

28 February 2021 4,521 3 View

What could be the reason for not having further low chi square value (better agreement) in my refinement result?

I have tried every combination of parameter changes and after that i have a poor chi square value. I can't get it lower any further. I know there have been a lot of discussion about Rietveld...

26 February 2021 8,480 3 View

How to plot the probability paper of Gumbel distribution using R programing?

In R-studio, there are many commands of Gumbel package. Arguments are also different. I`m asking about the alpha parameter of the Copula which must be greater than 1. If this is the one used to...

25 February 2021 5,229 3 View

Is it possible to set a breakpoint at a specific DYNAMIC instruction using the GNU Debugger (GDB)?

Using GDB, it is straightforward to debug and monitor a target program by setting a break-point at a specific instruction, since the instruction addresses are known. However, we have two...

24 February 2021 1,598 2 View

Implementation of chance-constrained optimization problem via scenario approach?

23 February 2021 7,826 2 View