Wired ghost image- In a TEM image. What might be the cause?

I am wondering what that ghost thick outline, which is around the carbon wire image which I have attached. I did prepare my sample in a different method (sonication-dispersion in Acetone- and...

31 December 2019 800 10 View

No/less features when electrodes tested in two electrode cell rather than 3 electrode cell?

Determination of the Specific Capacitance of Conducting Poly... The above article is a classic paper comparing two and three-electrode measurements for supercapacitors. There are many papers...

09 October 2019 399 1 View

How is charge density of a monolayer oxide calculated?

Hello there, Often in the literature, monolyer charge density is available for metal oxides. For example; Ni(OH)2 monloyer charge desnity is 524 microC/cm2. For Ag, 2.10 C/m2 . But how is this...

07 August 2018 5,513 1 View

How do I account for the contribution to the H evolution to the Qc?

I am calculating the charge on a metal electrode and I am pretty sure there would be some H evolution in the far left end. So do I account this. What is best technique to subtract this charge...

04 May 2018 6,954 1 View

Mass of Oxide layer naturally directly formed on the metal?

Hi there, How do I find the mass of the oxide directly formed on a metal? Eg, say I have copper. I would oxidize it to form copper oxide. How can I calculate the mass of the oxide? JUST THE OXIDE...

03 April 2018 1,419 5 View

What is the typical BET surface area of nickel foam?

Hi there, I have used nickel foam for my various experiments. And the manufacturers usually say porosity

03 April 2018 6,409 3 View

Multiplet splitting in XPS?

The general idea I have is, when we have photo ionised a molecule, vacancy will be created at the core and this vacancy could be filled by the electron in the outer shell (usually transition...

02 March 2018 3,057 7 View

Nickel carbide in carbon fibers/nanotubes after the growth?

Hi there, Commonly known theory for the growth of carbon nano tubes/fibers, is that a metal carbide which is metastable is formed and then this carbide decomposes to form graphene layers and form...

01 February 2018 1,262 1 View

Electrochemical surface area of CNT?

Hi there I want to determine the electrochemical surface area of CNT on a metal substrate. I would be using Randles- Sevcik equation to determine the surface area. But the problem is, which ion...

06 July 2017 4,085 4 View

Thickness of oxide layer using XPS data?

Hey there, I need to find out the thickness of metal oxide layer on a metal using XPS data. How do I do this? Is there any free tool to find this out? And what is the logic used for the...

11 December 2016 1,811 2 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

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

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

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View

How to quantify carbon deposition on CuZnAl catalyst?

Dear All, I want to quantify carbon deposition on the surface of the CuZnAl catalyst. I have tried thermogravimetric analysis, but I've got weight gain as the active Cu- get oxidised. Does anyone...

01 March 2021 1,907 3 View

Why Trivalent chromium start precipitating above PH 5 ? Moreover discuss difference between adsorption of chromium and precipitation of chromium ?

I am a student of MS Environmental Engineering and started my research phase. I am working on metal removal ( chromium iii ) by using activated carbon prepared from the agricultural feedstock. So...

01 March 2021 5,475 2 View

Adherance of Polyaniline coating over stainless steel?

Is the electropolymerisation of polyaniline coating over stainless steel (SS) via Cyclic voltammetry technique is really adherant? Else how to improve the adhesion of the coating, whether any...

01 March 2021 8,220 2 View