How to confirm cation and anion in crystal structure using the data of CIF file?

I would like to learn the technique to index cations and anions of inorganic compounds from the CIF file obtained from single XRD characterization. Kindly suggest the method for this. Thank you...

09 October 2018 5,176 1 View

YBaCuO superconductor sample requirement in INDIA?

Kindly provide the contact who is synthesizing YBaCuO superconductor in bulk form....

02 March 2018 9,368 2 View

How to doped Chromium in ZnSe? If we want to grow Cr:ZnSe bulk crystal by vapor transport method then should we use Chromium powder or CrSe powder?

Its not clear about this question that how we can doped Cr in ZnSe by means of Chromium powder or CrSe powder. I want to grow Cr:ZnSe with various proportion of Cr in ZnSe to study the effect of...

03 April 2016 3,759 1 View

How to write proposal for post doc study?

I need the basic information to prepare proposal of post doc or research assistant...Which point should be incorporate in the proposal. Motivation letter are always the basic need of any position...

07 August 2015 7,257 1 View

Band structure determination is possible from CIF file?

Is it possible to calculate the band structure from data of single crystal XRD? Data is in the form of CIF file.

06 July 2014 9,115 5 View

Which journal is best for research pertaining to a new semiconducting materials in the form of single crystalline form?

.Nobody has reported this material yet. Kindly suggest options.

31 December 2013 7,934 4 View

What is difference among direct allowed, direct forbidden, indirect allowed and indirect forbidden gap in semiconductors?

Are there any figures which can explain this difference?

11 December 2013 6,860 2 View

How do I confirm cation and anion in the structure of crystals?

I want to know how to confirm the cation and anion of any crystalline material from CIF file? What is the key idea behind this analysis.

11 December 2013 1,440 5 View

Anisotropic behavior?

Generally it is said that crystalline materials are anisotropic but in crystalline materials, atomic arrangements are periodic in all three directions. So how can it behave anisotropic? If...

03 April 2013 5,437 6 View

What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

No title

25 February 2021 5,713 1 View

How the Ground Plane implantation is performed without damaging (and w/o varying the undoped nature) the top Si (8-10 nm) in FDSOI technology ?

It is a general practice to introduce Ground Plane in FDSOI devices under the BoX. The Ground Planes are introduced by Ion Implantation through Top Si layer and Buried Oxide. I wanted to know that...

24 February 2021 5,974 4 View

Can a semi-conductor material have different absorption coefficient?

Does the absorption coefficient of the semiconductor changes with the change in the structure of the semiconductor? If you have a thin film and nanowire of the same semiconductor, will the...

23 February 2021 9,799 4 View

How can we determine the band gap of a composite material that is made up of a composition of direct and indirect band gap semiconductor materials?

I have a direct band gap material and an indirect band gap material. If I made a composite of both through physical mixing. Then how can I determine the band gap of such a material as the Tauc...

17 February 2021 8,104 4 View

I am desigining UWB antenna with ecllipse shaped patch on HFSS.Why gain is coming negative ?

I am attaching my design and result of Gains.S11 parameter is less than -10dB from 3.1 to 9.8 Ghz.Z11 magnitude also lies between 40 -60 ohm for this range .Still gain is negative. Pls help

29 January 2021 4,334 3 View

Where to add metamaterial unit cells in microstrip patch antenna to enhance the antenna parameters?

In order to enhance the antenna parameters, meta-material unit cells are added but where to load them is more advantageous either at ground plane or at the patch side, also is it necessary to add...

24 January 2021 2,999 4 View

Any resist stripper which can remove thick metal based polymer residue and which is compatible with doped silicon ?

I am looking some resist strippers which can easily remove metal based polymer residue after post dry etch process. I have some candidates below but not sure if they are compatible with doped...

21 January 2021 3,008 3 View

What is the best way to calculate electrical conductivity of semiconductors and the same system with a layer of oxide using Quantum Espresso?

I have tried BoltzTrap, and EPW but I'm not sure whether Boltzmann Transport Equation is a right approach for a complex system (semi cond. + an Oxide layer or even the semiconductor itself). Also...

11 January 2021 4,597 4 View

Why the bandgap of CH3NH3PbCl3 films are different for spin-coating method and electrospinning method?

The observed bandgaps are 3.8 eV and 3.4 eV for spin-coated and electrospun films, respectively. What are the possible reasons?

08 January 2021 5,646 6 View