Nuno Ferreira

3 Questions 4 Answers 0 Followers

Questions related from Nuno Ferreira

Why am I getting much better SERS signal from droplet samples vs. the usual dried substrates?

As title suggests, can anyone explain what's the phenoma behind this? I know that I should be getting better SERS signal with dried samples (to promote analyte/nanoparticle proximity), but what is...

09 May 2018 2,233 3 View

How to ensure the formation of silver nanoparticles, other than SEM/TEM imaging?

Hey, In my masters thesis I'm looking forward to synthesise silver nanoparticles in situ on bacterial cellulose obtained from 'nata de coco', however, SEM/EDS imaging is not able to detect any...

01 March 2018 2,154 5 View

In silver nanoparticle UV-Vis analysis, what can relate to the additional peak around 250-300nm?

I'm synthesising silver nanoparticles using bacterial cellulose as the reducing agent, using only AgNO3 and the membrane itself. After UV-Vis analysis i get the SPR peak well defined, but get as...

01 March 2018 8,038 13 View