A team led by DGIST professor Seo Dae-ha is rolling out an experimental technique to control and take notice of the chemical result of an individual nanocatalyst utilizing an optical microscope. The task is likely to donate to catalyst design predicated on accurate knowledge of the photocatalytic reaction via an analysis method that helps understanding the electron excitation phenomenon and transition path.
This technology is likely to offer an experiment strategy predicated on system chemistry, a fresh experiment technique for precisely studying photocatalysts at the single particle level.
Plasmonic metals at the nanometer level, such as for example gold, exhibit high light absorption rate in a broad area within the number of visible light. They’re coupled with semiconductor photocatalysts to do something as a medium to improve light absorption. Excitation occurs where electrons gain energy and move as a a reaction to light absorption, also it appears through various paths according to the size of the metal and the wavelength of the light. There are numerous hypotheses on the result of the electron movement as a catalyst. The study team could test the hypotheses and reveal how electrons transfer by creating a new microscope that’s experimentally simpler and much more sophisticated compared to the conventional approach to observing chemical reactions.
Professor Seo Dae-ha’s research team developed hybrid nanoparticles (for instance, “gold/copper oxides,” a variety of gold and copper oxides), and lasers of different wavelengths were combined to research the reaction between them to check various hypotheses on the electron excitation phenomenon. Through this technique, the team could selectively induce electron excitation in gold nanoparticles, and quantitatively analyze their contributions by evaluating the upsurge in the reactivity of the catalyst. Furthermore, the team confirmed these excited electrons were used in the semiconductor to improve stability and reactivity simultaneously.
“The observational technology reported this is a technology that observes chemical reactions with high precision, efficiency, and low priced,” said Professor Seo Dae-ha of the Department of Physics and Chemistry at DGIST, while adding that “it really is expected that it’ll donate to the sophisticated design of catalysts and you will be applied as a complicated evaluation and control technology using nanoparticles for pharmaceuticals.”
The study was published in Chem.
More info: Yongdeok Ahn et al, Combinatorial selective synthesis and excitation experiments for quantitative analysis of ramifications of Au on a semiconductor photocatalyst, Chem (2022). DOI: 10.1016/j.chempr.2022.06.004
Journal information: Chem
Provided byDGIST (Daegu Gyeongbuk Institute of Science and Technology)
Citation: Optical microscope strategy allows observers to check on electrons moving inside gold (2022, August 12) retrieved 14 August 2022 from https://phys.org/news/2022-08-optical-microscope-strategy-electrons-gold.html
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