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

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

Could you recommend a reflectance standard for the UV region of spectrum?

It seems like the reflectance standard provided by the manufacturer of our spectrophotometer does not work for the UV area (

09 October 2015 5,311 4 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

How climate change will influences human and animal behavioral change?

The role of climate change influencing the human behavior as well as economics interest

01 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View