How to reduce lattice mismatch and dislocation densities in epitaxial films?

what factors affect an epitaxial film's lattice matching and dislocation densities? Are there any possible ways to reduce lattice mismatch and dislocations in various deposition techniques?

10 November 2019 9,343 3 View

What is the difference between fluorescence and luminescence background in Raman spectra?

what is the difference between fluorescence and luminescence background in Raman spectra? What kind of materials give fluorescence background and what kind of materials give luminescence background?

06 July 2019 1,905 2 View

What will the mixture of a direct and indirect band gap semiconductor be?

Cu2O and CuO are direct and indirect band gap materials respectively. We deposited a film that shows the Raman signatures of both CuO and Cu2O, what will be their band gap, direct or indirect?

05 June 2019 3,222 3 View

What are the easiest methods of doping graphene?

I have CVD graphene transferred to substrates. I am interested in p and n-doping of graphene. Are there any simple, easy and controllable methods of doping graphene films?

04 May 2019 1,269 9 View

How sometimes Raman-inactive and IR-active modes are observed in Raman spectra?

Sometimes, we can observe the IR-active and Raman-inactive modes in Raman spectra. What are the reasons behind the Raman activity of such modes?

04 May 2019 7,364 5 View

What can be the possible reasons and solutions of sample's surface going out of focus during in situ temperature dependent Raman spectroscopy?

We tried two different temperature dependent Raman set ups for our study. Every time we do temperature dependent Raman spectroscopy for a sample, the Raman signal is lost or quenched at some...

04 May 2019 3,759 8 View

What materials are highly sensitive to temperature?

what are the most temperature sensitive materials? Are there any materials that respond quickly to the abrupt temperature variations? I am interested in thin films mainly. I want find some...

03 April 2019 8,529 3 View

How to explain the IV data of photodetectors attached?

Its a photodetector.

03 April 2019 9,693 5 View

Which laser source is generally use for Photodetector IV measurements, pulsed laser or continuous laser source?

We have a pulsed laser source, and I have fabricated graphene based photodetectors, I want to study the IV characteristics and photoresponse of the devices. We don;t have a power meter, we have a...

03 April 2019 2,886 5 View

What are the in situ temperature dependent surface analysis techniques availabe?

I want to observe the surface of a sample in situ at different temperatures. Is it possible to take surface images at a particular temperature (mainly cryogenic temperatures)? If not, what in situ...

03 April 2019 5,173 11 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Research on Supply Chain Management in Indian context?

Hi, I am planning to apply for the PhD degree in the Supply Chain Mgt. with specific area of "Cold Storage warehouses" during Pandemics and wars. Where lock downs and shut downs are frequent....

02 March 2021 285 2 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

Where can I find atmospheric measurement profiles (temperature, density, etc.) between 300-800 km altitude?

I am investigating thermospheric mass density profiles between 300-800 km altitude. I would like to compare the variability with other parameters, including temperature, electron content,...

01 March 2021 5,902 3 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

Compact antenna for the frequency range 1 MHz-5 MHz?

Hello everybody! I have a problem with developing a compact antenna for the 1MHz-5MHz frequency range. Tell me what type of antenna can be used and what books and articles to read to perform this...

27 February 2021 7,710 4 View

Why do the air flow results vary totally when adding scalar in CFD ?

Dear All, We are using Autodesk cfd to calculate the air flow in a single sided naturally ventilated room, where air flow depends only on buoyancy due to temperature difference between inside and...

25 February 2021 9,602 4 View

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25 February 2021 5,713 1 View

What is the suitable range of Sulfur content and Viscosity of Heavy fluid Oil that used in Kiln?

What is the disadvantages of high sulfur content to the ceramic burning process? and what is the effect of outranged viscosity?

24 February 2021 8,219 2 View