I want to calculate ZnO nanoparticles absorbance using UV-Vis. I disperse the ZnO on surfactant (PAS). What are the most suitable wave length? Currently i'm using 420nma nd using aquadest as standard solution. Can anyone give me the link (journal or book) that mention about ZnO wavelength for uv-vis analysis? Thank you.
The UV-Vis absorption spectrum of ZnO nanoparticles depends on several parameter like method of fabrication, temperature, size and shape. Various fabrication methods result in ZnO nanoparticles that present their exciton peak in the range of 360-380 nm.
Dear Muhammad Triyogo Adiwibowo,
There is no well defined excitonic peak for ZnO nanoparticles; it varies because of the presence of various factors as mentioned in above answer. According to literature, their UV-Vis spectroscopic peak generally lies between 350 to 390 nm. If I am not wrong, you are getting peak at 420 nm, which depict the possibility to further reduce the size of your sample (ZnO nanoparticles). You can check this using TEM or you can calculate the particle size through UV-Vis spectroscopy itself. I am providing the link and paper to know more about the optical properties of ZnO and how to calculate the particle size.
https://www.hindawi.com/journals/isrn/2012/372505
Hopefully, It may solve your query.
Good Luck!
Peak at 360nm. Thank you for y'all answers. And thank you for the journal.
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