Recent content by acvtre

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...

I'm trying different solutions and one of these has 0.1% of ethanolamine as a suspension agent, right.

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...