Is it possible to do Reitveld Refinement on single crystal XRD data?

I tried to do single-crystal Rietveld Refinement on my single-crystal XRD data using the option "refinement on single-crystal data/ integrated intensity data" in Fullprof but it is giving error...

30 January 2021 7,813 3 View

What will be the impact on Antenna performance to shift the resonant frequency by RLC Matching network?

There is always a possibility to shift the resonance frequency by adding a RLC matching network. I wonder what will be the consequence on antenna performance (axial ratio, gain)? If there is no...

13 September 2020 5,187 3 View

Axial ratio shows different result at different ortogonal setup. What could be the reason ?

17 June 2020 5,332 3 View

Firm survival and mortality: How to relate both?

I have two data sets 1. Age of all the surviving firms at any given point of time. The age distribution is an exponential function 2. The age of all the firms which died at a given point of time (...

01 February 2020 3,542 1 View

Why Antenna shows negative gain even though it has very good matching?

I am aware of the fact that electrically small antennas are poor radiators with very small gain and low efficiency. One main cause of this is poor matching. An extremly electrically small antenna...

19 January 2020 5,285 9 View

What is the impact of image current from ground plane on patch antenna? I wonder how it radiates if ground plane is very near to radiator?

As we know, patch antenna is combination of two magnetic dipole. If we place a perfect electrical conductor near a dipole, antenna performance will suffer significantly. Then how a patch antenna...

27 November 2019 7,597 5 View

I am getting two peaks at 702 and 705 eV for Fe 2p scan of a composite made from Fe-salen.how it can be explained?

the pure Fe-salen spectra is in conformity with literature,but the composite is showing two extra peaks at 702 and 705 eV. Can anybody explain about why the peaks are coming.

23 July 2019 5,710 3 View

What will be the cororidinate(theta and phi) to evaluate the axial ratio?

I have designed a circular polarized antenna. But , I am confused with cor-ordinate system. In some angel it shows less than 2 dB axial ratio and some other point it shows more than 10 dB like a...

23 May 2019 2,175 7 View

Why there is a big difference in between realize gain and gain in my design?

I have designed a multiport antenna. Where as, I have 2 dB Gain but realize gain is -6 dB. Point to be noted, S11 is really good. I have -25 dB return loss at my desired frequency.

22 November 2018 6,165 17 View

Bands in western blot are behaving like GHOST!!!!!!!!!!!!!!!!!?

I am doing western blot and after development I can see that one/ two lanes have no band. Perhaps, next day I am doing same gel run with same sample with no change in protocol, this time another...

25 September 2018 8,325 3 View

How to determine fluorescence quantum yield for photoswitchable/photochromic compounds?

How to determine FQY for photoswitchable compounds? I found most related publications didnt mention, or just said that they used "Absolute quantum yield spectrometer." I think such technique...

31 October 2020 8,002 5 View

How do I confirm the geometry stability in Gaussian simulation by vibration frequency calculation for excited state?

I am currently trying to elucidate how my photochromic dye change it geometry at excited state with Gaussian TDDFT simulation. 1. For ground state "opt", I have got an optimized geometry (G1) and...

31 December 2017 7,303 1 View

Which type of photoisomerization process is likely to proceed for imine dyes with salicylaldehyde (ortho-OH benzaldehyde) group?

Whenever double bonds, such as C=N, C=C, N=N are presented, dyes may have photochromic properties and can be confirmed by light irradiation. By identifying another long-lived/reversible peak in UV...

10 November 2017 6,060 1 View

Why the UV-vis spectra of 3 chloro phenol changes

06 July 2017 3,863 7 View

How con i measure the photochromic property of a nanomaterial?

Is UV is the sufficent tool for photochromic property study

01 February 2016 9,107 3 View

Can phosphotungstic acid dissolved in ethanol behave as a photochromic material? if yes please provide the details.?

The excitation wavelength? The color of the same solution after incident to light beam..?

09 October 2015 5,568 1 View

Is there any material which is black in color and upon exposure to intense beam of light will switch to any color other than black?

Name of the Material & its details.

09 October 2015 5,447 1 View

How can a fluorescence recovery of GFP occur after a fluorescence decrease happens by light exposure?

31 December 2014 6,676 6 View

Where can I get complete information of these dyes?

11 December 2014 1,279 0 View

How do you prolong photochromism of organic photochromic dye?

Spirooxazine dye has been incorporated within an organic-inorganic hybrid silica material (organo-silsesquioxane) and fabricated as a thin film. Previously, the film showed sensational color...

09 October 2014 8,330 5 View