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 the relation of X2 and R factors in fullprof program?

09 October 2015 3,191 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 to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 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

Sample dilution for quantitative analysis using ELISA?

If the detection range is in ng/ml but the reference range is in ug/ml for a molecule or protein in serum or plasma .how to dilute and what is the initial volume to be taken for quantitative analysis

02 March 2021 7,670 3 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View