Improvement of heat dissipation in Ag/Ni substrates for testing Cu-TiO2/TiO2-modified filters using SERS spectroscopy

Bandarenka, Hanna ORCID: https://orcid.org/0000-0003-4254-8261, Burko, Aliaksandr, Girel, Kseniya, Laputsko, Diana, Orel, Elizaveta, Mizgailo, Anna, Sharopov, Utkirjon, Podelinska, Alise, Shapel, Uladzislau, Pankratov, Vladimir, Piskunov, Sergei and Bocharov, Dmitry 2026. Improvement of heat dissipation in Ag/Ni substrates for testing Cu-TiO2/TiO2-modified filters using SERS spectroscopy. Crystals 13 (5) , 749. 10.3390/cryst13050749

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Abstract

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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Publisher:	MDPI
ISSN:	2073-4352
Date of First Compliant Deposit:	30 July 2026
Date of Acceptance:	26 April 2023
Last Modified:	07 Sep 2026 21:52
URI:	https://orca.cardiff.ac.uk/id/eprint/188537

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