What are all the possible reasons for Spontaneous symmetry breaking in a double quantum well system?

Dear frnds, From my point of view SSB is happening due to following reasons in double quantum wells. 1. Due to variational technique 2. symmetry in envelop function and...

09 October 2019 7,944 2 View

How to account Bandgap renormalization in QWs?

Band gap re-normalization dynamics in nanostructures would induce lot of activities as we study interaction of 2D layer with light. Its understanding needs some clarity as below: 1. Which...

03 April 2019 3,846 5 View

What is the significance of size dependent dielectric screening in optimizing excitonic properties?

Mott-Wannier excitons are formed in a semiconductor material as a result of light-matter interactions. However, their delocalizing properties inside the crystal induce screening effects in their...

01 February 2019 2,333 1 View

How to prepare a photoanode of DSSC using GQDs supernatant solution ?

GQDs are synthesized from GO using ammonia solution.After hydrothermal treatment the solution was filtered using 0.22 micrometer membrane. Finally to obtained GQDs as a supernatant liquid. Can...

04 May 2017 1,054 0 View

How to separate GQDs from the synthesized final solution?

04 May 2017 7,328 11 View

Can any body explain the sub-band structure of Quantum Rings?

Quantum Rings are an ideal nanostructure where its subbands are peculiar in nature. It shows higher binding energy than the effective Rydberg at bulk limit. A contrasting behavior than the...

02 March 2016 4,296 1 View

How to increase the exciton concentration in intrinsic semiconductor? can it be possible with doping?

any body

08 September 2015 2,819 0 View

Charge collection efficiency of a Solar Cells

ncc=(1+ (Rs/Rct))-1 What is the effective way to account this property?

01 January 1970 8,073 1 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 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

How to form a shell around a nanostructure core in solution phase synthesis?

Hey, I want to know if I have fabricated some nanostructure and further I want to make a shell on the nanostructure by solution phase method by making it core-shell nanostructure. So, anybody can...

01 February 2021 9,966 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

What's the difference between light absorption and coupling in plasmonic metals?

What's the difference between light absorption and coupling in plasmonic metals? It seems that light absorbed in metal nanostructure/nanoparticles doesn't contribute to enhancement in electric...

14 January 2021 1,884 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

How to calculate the band potential of a semiconductor material using energy band gap?

I am looking for methods to calculate the band potential of ZnFe2O4 and Fe2O3.

05 January 2021 6,416 2 View

I want to use Gold electrode as a reference electrode for electrodeposition of nanostructures. Can i use it and how ??

How to use a Gold electrode as a reference electrode ??

04 January 2021 4,058 4 View