I want to know other techniques than TEM and SEM for determining the formation of non-fluorescent metal nanoclusters. I have seen papers use Mass spectrometry. Are there any other techniques?
Hello
you can see the following articles:
https://www.sciencedirect.com/book/9780323886574/luminescent-metal-nanoclusters
Characterization, detection, and counting of metal nanoparticles using flow cytometry
Fluorescent metal nanoclusters: From synthesis to applications
Even if they lack fluorescence, the clusters may absorb light at specific wavelengths, so UV-VIS is worth a shot. This may also be true for complexes of metal NCs and certain ligands.
Some complexes even have catalytic activity which can be determined.
AFM can determine the nanometric size of particles, but it is somewhat similar to TEM in this case.
Size exclusion columns may also be able to separate the clusters from the solvent for downstream characterization.
Perhaps FTIR or SAXS could also help with characterization, but I am mostly unfamiliar with these methods.
Dynamic light scattering (DLS) and small-angle X-ray scattering (SAXS) are pretty much universal techniques. AFM might be demanding for sample preparation, but it is also possible.
Shift in the surface plasmon resonance (SFR) UV-VIS absorption peak works in some specific cases.
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