How to estimate the glass forming region throgh the XRD data?

Glasses with certain composition of different chemical compounds forms in a specific range only. Beyond the range it will be difficult to form the glass in normal melt quenching. is there any...

10 November 2014 9,680 4 View

What is meant by Negative absorbance?

09 October 2014 2,921 19 View

Is it possible to calculate the refractive index of glasses by UV-VIS spectrum?

Calculation of energy band gap or optical obsorption from UV-Vis spectrum is possible. Is there any relation between these parameters with refractive index for glass samples? My glass samples are...

06 July 2014 7,797 6 View

Does the thickness of the materials effects the nonlinear refractive index for the nonlinear optical materials?

The velocity of light of particular wavelength may vary as it is going deep in the nonlinear optical materials. If it is like that what is the reason for that?

06 July 2014 3,602 10 View

Can anyone distinguish the Z-scan and I-scan techniques for the characterization of nonlinear optical materials?

Recently some papers reported with I-scan to evaluate the nonlinearity of the materials. What are the advancements through the I-scan technique?

04 May 2014 8,453 2 View

Why do the glasses possess both direct band gap and indirect band gap?

What is the phenomena for the glasses to possess both direct and indirect band gaps?

03 April 2014 988 4 View

Is there any method to find the refractive index of opaque glass samples?

During synthesis of glasses I get samples with opaque structure. I need to measure the refractive index of that samples in visible or infrared region. What is the method that can be used to...

03 April 2014 1,869 9 View

Please can any one share the PDF of Holmarc Ellipsometer manual?

We have a variable angle ellipsometer from Holmarc in our lab and need to measure the refractive index of glass samples. But we are in confusion to align primary adjustments. Please help us by...

03 April 2014 8,077 1 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

How to check the uv-vis absorption of nanoparticle by surface plasmon resonance?

I try to check the uv-vis absorption of Indium nanoparticle. Now I am measuring in solution, can I measure it in the form of a film?

01 March 2021 930 3 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Why initial concentration of Pb not the same as calculated one when testing using AAS?

I am currently doing research on the adsorption of heavy metal using magnetic reduce graphene oxide. I use AAS to determine the concentration of the heavy metal. I prepare the Pb solution with...

26 February 2021 9,580 4 View

Is it possible to have two luminescence bands of the same peak position but with different intensities in single spectrum??

Hi! If it is possible to have two luminescence bands of the same peak position in a spectrum, what is the reason behind formation of two separate bands instead of one? This phenomenon is related...

26 February 2021 4,963 5 View

How can I find a Raman spectrum wavenumber corresponding to what compound?

I have several Raman spectra with very distinct peaks at certain wavenumbers, such as 277, 359, 466, 583, 623, 686, and 795cm-1. How can I identify them to what compound(s)? The RRUFF and others...

24 February 2021 363 3 View

How to search for crystal structure for material with atomic position labelled?

I am using the crystallographic open database and materials project to search for cif file but the exact structure is not mentioned or how can I deduce that the given structure and atomic position...

23 February 2021 6,723 2 View

Is this the write procedure for acid digestion of soil for heavy metal analysis using AAS?

How to do acid digestion of soil sample with 3:1 aquaregia in an open vessel?

23 February 2021 3,053 7 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