What is the correlation b/w Crystallite size and Domain size?

# crystallite is the part of the crystal which coherently diffracts the X-rays falling on them. # A ferroelectric domain is the part of the material in which all the polarization vectors are...

03 April 2019 7,668 9 View

Does all the lattice site become cubic when Zr or Sn like elements are doped at Ti-site of barium titanate?

# Barium Titanate (BT) is tetragonal at room temperature. # XRD, Raman and numerous other studies show that BT becomes cubic when Zirconium or tin is substituted at titanium site minimum by 20%. #...

11 December 2018 566 3 View

It is a question about Raman baseline fitting?

I want to perform baseline correction for a raman data. Which kind of baseline correction is the best for Raman? I am using origin. Should I pick up the random baseline points and subtract it or...

11 December 2018 1,234 0 View

What does softening of a phonon mode exactly mean?

What does it mean by the softening of a phonon mode? In the available literature i have interpreted two definitions - # 1. Softening of a mode means the phonon peak becomes smaller and broader. #...

10 November 2018 4,950 2 View

In ferroelectrics,1st order phase transition like Barium titanate. At Curie temp. polarization shows disontinuity but permittivity shows a peak, how?

In fact, i want to know that before and after the permittivity peak(curie temp.) permittivity Vs time curve shows very low permittivity as compared to the peak value both before and after curie...

02 March 2017 9,348 2 View

In sol-gel method, small quantity is dissolving properly in acetic acid but high quantity is not dissolving properly?

I am preparing Ni doped BT by sol-gel method. i dissolved Ni nitrate and barium acetate in acetic acid. in case of small quantity of Nickel nitrate it is dissolving properly but in case of high...

02 March 2017 2,866 3 View

What is Nano technology with coronavirus helpe the human..and is it nano mterals removal of covid19?

I anwar by adsorption or reaction ..but it is either more method...

02 March 2021 4,811 2 View

How to compare different concentrations of nanoparticles for characterization from ICP-MS?

I took measurements of different concentrations of 15 nm and 5 nm Au nano particle solutions. I'm trying to determine which concentration I measured gives the best reading overall. I also...

02 March 2021 7,626 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

LEDs on Vis Light photo degradation of MB water sol via N doped TiO2 in a mini flume?

Good day to all, I have no experience with light emitting diodes. I am building a glass mini flume to demonstrate the photo degradation of Methylene Blue in water running over self cleaning...

26 February 2021 4,026 5 View

Zno nano particles colour changed from white to grey in process of calcination any suggestions?

In the formation of Zno nano particles process, after drying at 120 degree C, my zno nano particles are completely white but when i calcine it for 450 degree C it converts into grey colour. i...

26 February 2021 2,435 4 View

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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

QPCR tubes for Roche Lightcycler Nano?

We own a small cPCR thermal cycler from Roche, Lightcycler Nano, which is convenient for backup quick runs. Recently, Roche has discontinued the plastics for it and they offer no alternative from...

17 February 2021 8,694 5 View

ZnS oxidizes to ZnO!!why??

when I put my ZnS solution in the chemical bath, the ZnS oxidizes so there are ZnO peaks appearing because of the reaction with the oxygen in the air, despite the fact that I close the beaker...

14 February 2021 5,778 9 View

Best synthesis method for large scale silver nanoparticle synthesis with high yield?.Best post processing steps after nanoparticle synthesis?

I have chemically synthesized silver nanoparticle to combat microbes on wound site. I have used many methods of synthesis, but I found minimal field of silver NP product.I am getting whitish...

11 February 2021 4,964 13 View