Anyone know of someone with a functioning Transmission IR Spectrometer they wish to sell?

31 January 2018 0 2K Report

Polymer Project: Chemical rxns, co-polymers, NP addition various fillers etc- Need to ID organic bonds to refine process.

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Is is possible to calculate the activation energy of Redox Reactions Using Gaussian?

Hi everyone, I'm working on calculating the activation energies for some redox reactions using Gaussian, Here are the reactions I'm interesting: Py•−+ 3O2 → Py + 3O2•− Py•− + 1O2 → Py + 1O2•− Is...

18 July 2024 4,418 3 View

NH3/NF3/H2 Remote plasma Oxi/nit selective etching mechanism help ??

Hello, I am an Etch Engineer. I am performing etching with high T_ox/Nit selectivity using remote plasma. Etching plasma is formed using only NH3/NF3/H2. 1. I wonder if it would be advantageous...

11 July 2024 8,115 2 View

What is the effect on ions in the remote plasma structure?

The CCP type has a structure where plasma is formed at the top and only radicals come down through an ion filter. I'm curious that even if ions come down, there is no bias applied to the...

16 June 2024 6,824 1 View

As an etch process engineer, which books would be helpful for work?

Hello, I am an engineer who deals with etching processes. I'm trying to study the etching process and would like to ask which book would be good to study. I graduated from the Electronics...

05 June 2024 4,977 2 View

I want to know Bond strength and Etch mechanism?

I am asking this question because I want to make sure my understanding is correct. I'm learning about the etching process, but I'm having difficulty with bond strength and etching mechanism. I'm...

21 May 2024 2,409 1 View

Has anyone had experience setting up a Getinge 500 mL mini-bioreactor?

Just wondering if anyone has any experience in setting up a Getinge mini bioreactor? More specifically, autoclaving the reactor, the gel pH sensor, and the dO2 sensor. I am having trouble...

02 May 2024 7,741 1 View

What causes bandgaps in periodic elastic laminates?

I've been trying to find an explanation for why bandgaps can form in periodic elastic laminates but so far I haven't found a good explanation. Can anyone point me to any resources which might...

01 May 2024 2,241 1 View

What causes bandgaps in periodic media?

I am aware that periodically layered media (if structured properly) can produce bandgaps, however I have never found a great explanation for this in the phononics case. Can someone please provide...

30 April 2024 9,681 4 View

How to determine anode and cathode materials for supercapacitor applications?

I observed that activated carbon is employed as anode materials and manganese oxide as a cathode material for supercapacitor application using two-electrode system in KOH electrolyte. Please...

26 April 2024 7,962 1 View

Why some materials store energy through cation while others through anions in two electrode system?

It is observed that MnO2 stores charge by means of potassium (+) ion while cobalt oxide store energy by hydroxide (-) ion while both materials are employed as cathodes in separate systems.

26 April 2024 8,079 1 View

I need JCPDS file of LSFCO nanomaterial. Can anyone provide me?

Require for Rietveld refinement in XRD.

08 August 2024 3,081 2 View

Should I include H atom into C3N5 when i am doing DFT modelling?

Hi all, my experimental XPS results shown that my C3N5 sample consists of N-H bond, hence in this case I should incorporate the N-H bond into my DFT modelling. However, I do notice several papers...

07 August 2024 8,414 2 View

How to fix background error in rietveld refinement of one XRD peak using GSAS-II?

I want to refine one XRD peak of my in-situ xrd but the background is never working good which ultimately fails the refinement. How to refine and adjust the background using GSAS-II

05 August 2024 5,291 2 View

What is the principle/mechanism behind aging of carbon (graphite) containing refractory mix for isostatically pressed refractories?

The resin bonded carbon containing refractories are aged before use. How time of aging is determined? And mechanism behind aging.

23 July 2024 3,205 0 View

How can we conduct DFT for solutions or mixtures ?

Can we conduct DFT studies for Ionic Liquids with Amines at various concentrations? If so, how can we proceed with these studies? Additionally, what parameters, besides IR, NMR, and HOMO-LUMO, can...

18 July 2024 319 1 View

Can Langmuir constant related to bonding energy (Kl) and Freundlich exponent (1/n) indicative of ads intensity show opposite trends with temperature?

The adsorbate is Arsenic and the adsorbent is a soil

18 July 2024 332 8 View

How to decide whether the refinement is correct or not, based on Rwp and Rexp factors by Fullprof?

One of the papers I read by Toby, where (title of the paper was "R factors in Rietveld analysis: How good is good enough?"), he tells us that to get good chi square value, you must have low Rwp,...

17 July 2024 9,668 4 View

How to create parameter and coordinate files for ligand in amber when FATAL error (maybe due to duplicate bond specifications) happens?

Hello, I'm trying to create parameter and coordinate files for a drug (PRG-A01) found on the following page: http://www.probechem.com/products_PRG-A01.html I used the guide made by Michael...

17 July 2024 3,472 3 View

How to bring baseline to zero for an absorbance data for chromatogram?

I forgot to autozero during the run (Size exclusion chromatography.) and later i realised i forgot to do that and the baseline was not zero but below zero (and in some cases it above zero). I...

15 July 2024 5,551 6 View

Can anyone suggest what amount of powder I have to disperse in the solvent for taking the FTIR spectra?

I have to compare the FTIR of the two samples, one is in powder form and other one is the powder dispersed in IPA or water. Both are same material, so how the bond will change

09 July 2024 8,011 2 View