I want to know the energy value of electron usually used to get HRTEM image.Is it 200 eV ?
It is definitely not 200 eV, but rather something between 80 - 300 keV (depending on system and sample)
@Bjorn Hoffmann : ya right... its 200 keV.. thanks
Hello, I have two questions. 1) Why thermodynamics is important to all branches of science including mechanical, civil, material science, metallurgy, astryphysics etc. ? 2) Which thermodynamic...
03 April 2017 2,857 0 View
Hello, I have prepared carbon coated metal nanoparticles. In raman specta I found intensity ration of D and G band (Id/Ig) ratio to decrease from 0.91 to 0.95 with increase in heat treatment...
01 February 2017 6,292 6 View
Hello, I have synthesized silver nanoparticles using PVA as encapsulating and stabilizing agent. From XRD i could get 25 and 28 nm crystallite size for 400 C and 500 C annealed samples. The...
01 February 2017 7,523 3 View
Hello, I have obtained Gd doped CeO2 nanoparticles. With UV spectra I could find increase in direct band gap values from 3.6 eV to 3.8 eV. Howerver, I was expecting band gap to decrease with...
09 October 2016 10,047 4 View
Hello, I have prepared 3%, 5%, 10% gadolinium doped CeO2 (GDC) and have heat treated it at 400 C, 500 C, and 1200 C. See attached figure for peak shift. I have calculated lattice parameter for all...
09 October 2016 9,953 7 View
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09 October 2016 1,897 7 View
Hello, Please look at the below curve and explain what does the hump in FC-ZFC curve indicates. What if there is no hump in it. Regards,
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Hello I want to calculate the amount of Ce3+, Ce4+ and Oxygen concentration in CeO2 sample. I have peak area (after deconvolution) of all. However, I do not know the sensitivity factor which is...
08 September 2016 9,529 8 View
Hello, If I get UV-vis absorption peat at 340 nm for a semiconductor and if I excite the material with 290 nm wavelength, where shall I expect the PL peak in emission spectrum assuming no other...
08 September 2016 8,545 8 View
Hello, I want to obtain X, Y, Z position of atoms for La0.6Sr0.4Fe0.8Co0.2O3 rhombohedral structure. How can I obtain it ? Can anyone help me for it ? I have data for XRD.
03 April 2016 1,466 4 View
I have virus (viral hemorrhagic septicemia virus) in suspension and the experiment will not involve cells. What level of TCID50 is preferred?
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How to develop investments in renewable energy sources?
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Hello dear colleagues, We have prepared a manuscript on NiTi-based alloys and are seeking a second opinion on our current TEM results. If you are a Ph.D. holder with experience in TEM and have...
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After immunohistochemistry of previously fixed in PFA and EtOH and then frozen 20 μm sections of zebrafish brain, DAPI staining is very weak (right) compared to the same sections stained without...
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average particle size calculation from TEM
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Hi everyone I need a file with a dirty and clean potato image
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Why is the molecule's orientation with an electric field affect polarizability? Electrons are diffuse enough to be independent with respect to orientation and effect of electric field on...
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I'm guessing it's because the ligand experiences too much electron repulsion or proton repulsion from the chromium to insert them close to the 3d-orbitals which are close to the metal nucleus. Is...
03 August 2024 1,370 1 View