Improvement of Heat Dissipation in Ag/Ni Substrates for Testing Cu-TiO2/TiO2-Modified Filters Using SERS Spectroscopy
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Author
Bandarenka, Hanna
Burko, Aliaksandr
Girel, Kseniya
Laputsko, Diana
Orel, Elizaveta
Mizgailo, Anna
Sharopov, Utkirjon
Podelinska, Alise
Shapel, Uladzislau
Pankratov, Vladimir
Piskunov, Sergei
Bocharov, Dmitry
Date
2023Metadata
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Surface-enhanced Raman scattering (SERS) spectroscopy is used to investigate a composition of wash swabs from the Cu-TiO2/TiO2-modified filters with disinfecting ability. Macroporous Si chips coated with conformal 800 nm thick Ni layer and Ag particles (Ag/Ni) are engineered to act as SERS-active substrates. Such substrates are characterized by a moderate reflection band in the visible range and provide an improved heat dissipation from contaminants in wash swabs during SERS study. This prevents thermal-induced destruction of analyzing media for reliable assessment of its composition. The anatase Cu-TiO2 and TiO2 nanoparticles are synthesized using the sol-gel method and characterized via Raman spectroscopy and X-ray diffractometry. The filters are modified with Cu-TiO2/TiO2 nanoparticles and embedded in three-valve facial masks that are worn by a volunteer to breathe for 4 h. Comparative SERS analysis of the filters shows that they slightly destroy chemical bonds in the molecules constituting airborne contaminations upon ceiling day lights, which can be associated with Cu-TiO2 photocatalytic activity. The filters additionally exposed to near-ultraviolet light prominently decrease the intensity of Raman signatures of airborne contaminant due to the presence of pure TiO2. --//-- This is an open-access article Bandarenka, H.; Burko, A.; Girel, K.; Laputsko, D.; Orel, E.; Mizgailo, A.; Sharopov, U.; Podelinska, A.; Shapel, U.; Pankratov, V.; et al. Improvement of Heat Dissipation in Ag/Ni Substrates for Testing Cu-TiO2/TiO2-Modified Filters Using SERS Spectroscopy. Crystals 2023, 13, 749. https://doi.org/10.3390/cryst13050749 published under the CC BY 4.0 licence.