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

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

Whats the meaning of sense hi and sense lo, force hi and force lo?

On a keithley source meters, the four connections are availabe, sense hi, sense lo, force hi and force lo. I want to know the difference between them.

02 March 2019 2,561 4 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

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

03 March 2021 8,272 1 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 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

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 the countries most affected by extreme rainfall as a result of climate change?

Increased heat, drought and insect outbreaks, all associated to climate change, have increased wildfires. Decreasing water supplies, declined agricultural yields, health impacts in cities owing to...

01 March 2021 7,168 9 View

How Can I bring as much common elements in steel as possible to calculate stable phase(s) in OpenCalphad?

As I was tweaking step-by-step OpenCalphad6 Macros step1.ocm involving phase and thermal property calculation of a High-speed steel, I could not incorporate more than 6 elements in the steel...

01 March 2021 8,840 1 View

How can you bring two structures together to create an adhesive bond in LAMMPS?

I have created an Ice 1h crystalline structure and an Aluminium substrate structure and equilibrated both at 250K. Now I need to bring them together in a way that an adhesive bond is created....

01 March 2021 3,325 2 View