Hi everybody, I'm a PhD student working on solution-processed kesterite PV cells. The material is spin-coated and I personally believe that its wetting properties are influenced by environmental parameters like temperature and humidity.
To control these parameters, or at least reduce their...
Aaaaaand here it is:
I've done the analyses as you suggested with a solution of water + ethanolamine with a 20% and 40% concentration and acetonitrile as background. As you can see there's a big absorbance at 225nm. So I think this one is the cut-off wavelength of the ethanolamine.
In my...
- I use the UV-vis spectrophotometer in order to find out if I got GIZO nanoparticles in different solutions, to do so, I always use a reference background, wavelength scan from 600nm to 200nm and what I need to see is a peak between 205-210nm.
- I really don't know what is the lambda max of...
All the solutions give me a peak around 210nm, which is the nanoparticle peak, I alwasy use the background. Only the ethanolamine gives me a weird result, even though I use the background, which is a non-sense.
As I've written, also when I use only ethanolamine I get the same weird results...
I encountered this problem with a solution that only had 0.1% of ethanolammine. In particular, my analyte was composed by: GIZO nanoparticles dispersed in ethylene glycol, pentanol, PVA and ethanolammine.
As I had the negative absorbance I analyzed the ethanolamine as analyte on itself, with...
Yes, it is a double beam, infact I've got one space for the for the reference and another one for the sample to analyze. For what I understand the baseline is constant and what I see is a peak that goes below it.
I've got this problem only with the amines. I've tried with pure ethanolamine and...
Good day to everybody, I immediately expose my problem.
I'm doing some measurements with the UV-vis spectroscopy and I'm having problems with the amines in the non visible region.
This is what I do: put my amine in a quartz cuvette -> do the background (reference) -> analyze the same solution...