Why images in scanning electron microscope(sem) got bright stripes?

why images in scanning electron microscope(sem) got bright stripes? an image is attached. it does not look like a material related contrast(polymers). it does not disappear with current, voltage...

31 December 2019 8,797 4 View

Connect a gas tank instead of compressor?

Is it safe to connect a gas tank instead of compressor to a laser system that uses gas to cool down the sample and clean the debris. The system won't start unless compressor is working. What...

07 August 2019 831 4 View

Should the magnetron sputtering system's targets be always oxidized?

I use reactive magnetron sputtering system to deposit TiO thin films. Specifically, I use 3 Ti targets, 8 mTorr of Ar with O2(20/3.5). However, if I use 3 sccm of O2, I obtain Ti and if I use 3.5...

31 December 2016 1,119 5 View

Raman database of Ti and TiH2?

Is there any database available to check the Raman spectra of Ti( Metal) and TiHx species? There are none in rruff

10 November 2016 1,620 1 View

Which theory I should use to calculate abosrbance of a semi-transparent thin film?

08 September 2016 6,052 12 View

May you suggest a VIS- light source for measuring photocatalytic activity?

The most popular VIS-light source for measuring photocatalytic activity must be XBO R 300 W/60 C OFR by Osram. However, it is not easy to buy the source and it does not seem easy to use it- it...

06 July 2016 8,861 12 View

Why Ti layer has been oxidized?

I deposit films by magnetron sputtering from Ti and TiO2 targets in Ar plasma[Pbase=10^-6 Torr]. I deposited a 70 nm-layer of Ti and then 120 nm-layer of TiO2 on top of it however, after annealing...

05 June 2016 9,378 16 View

Why our XRD spectra look different for the same sample, but on different holders?

We use Rigaku D/Max-2500V X-ray Diffractometer for obtaining XRD spectra of our samples. The sample used in this experiment was Si powder prepared by milling the silicon wafer. We have used 3...

03 April 2016 705 5 View

How do I ignite plasma using the RF-generator?

We use RF-generator PFG600-RF[Trumpf] for depositing thin films in our3-target magnetron sputtering system. It works perfectly fine for conductivetargets and it is very easy to eliminate REFP...

03 April 2016 2,798 26 View

Can anyone recommend a high temperature sealer paste?

We use a water- cooled mini-lamp annealing system Mila-3000 that can provide annealing at a temperature of 1000 C. 2 months ago we got a hole in the water cooling subsystem and after it was...

10 November 2015 3,899 0 View

How to analyze a particular region of my simulation box in GROMACS?

Hi, I am using GROMACS 5.1.4 to simulate water in contact with a surface. I am only interested to calculate some properties of water near the surface. Let's say at a distance of x nm from the...

03 March 2021 9,989 2 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

How to formulate Energy minimization in Molecular dynamics simulation for alloys using meam potential?

during MD simulation, the atoms are not moving as per required. The problem (as per my observation) lies in energy minimization technique. upon application of tensile strain in x or y direction,...

22 February 2021 380 5 View

Magnetismic Gravity in the universe?

MAGNETISMIC GRAVITY What is magnetism? Something magnetic has a + and - charge. If 2 + or - are pushed if + and - are pulled. But what is the main reason for this? Why does magnetism have a pull...

21 February 2021 9,538 3 View

Has anyone succeeded in capturing uranium atoms in a fullerene structure?

Additional questions are: What are the encapsulating atoms? How difficult was the process and what rates were achieved? What factors most seriously affect the economics?

20 February 2021 3,134 5 View

How to get the vector of a specific vibration mode in phonon dispersion?

For example, I have this phonon dispersion(Fig. 1), and now I would like get vector of atoms which describes TA1 in P. I know v_sim can show vibrational animation of specific mode, but I do not...

20 February 2021 4,332 4 View

What are the potential shell well and atomic solvation parameters for the boron atom?

I have a protein-ligand docking project. The ligand contains boron atoms that are not detected by Autodock software. To solve this problem, it is necessary to introduce the boron atom to...

19 February 2021 1,236 1 View

How to combine two geometries in LAMMPS ?

I am trying to simulate contact angle of water on a quartz slab using LAMMPS. I have created and equilibriated the quartz slab and the water cluster separately. Now I want to create a composite...

17 February 2021 5,884 2 View

Rdf of atoms from a COM or point in lammps or VMD?

Hello all, as I understand there isn't any straight way to get an rdf of atoms from the center of mass or a coordinate of specific atoms in lammps. I wonder if anyone know any trick or way to get...

16 February 2021 2,517 2 View

What is error #2070 in gaussian.how we do resolve it?

We want to ONIOM calculation in gaussian16. However, gaussian doesn't work. What should we do? Atom 15 layer R linked to atom 85 is also bonded to atom 161 in layer M bad...

15 February 2021 7,766 3 View