Application of a 2D Molybdenum Telluride in SERS Detection of Biorelevant Molecules

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http://hdl.handle.net/10138/323374

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Fraser , J P , Postnikov , P , Miliutina , E , Kolska , Z , Valiev , R , Svorcik , V , Lyutakov , O , Ganin , A Y & Guselnikova , O 2020 , ' Application of a 2D Molybdenum Telluride in SERS Detection of Biorelevant Molecules ' , ACS Applied Materials & Interfaces , vol. 12 , no. 42 , pp. 47774-47783 . https://doi.org/10.1021/acsami.0c11231

Title: Application of a 2D Molybdenum Telluride in SERS Detection of Biorelevant Molecules
Author: Fraser, James P.; Postnikov, Pavel; Miliutina, Elena; Kolska, Zdenka; Valiev, Rashid; Svorcik, Vaclav; Lyutakov, Oleksiy; Ganin, Alexey Y.; Guselnikova, Olga
Contributor: University of Helsinki, Department of Chemistry
Date: 2020-10-21
Language: eng
Number of pages: 10
Belongs to series: ACS Applied Materials & Interfaces
ISSN: 1944-8244
URI: http://hdl.handle.net/10138/323374
Abstract: Two-dimensional (2D) transition-metal dichalcogenides have become promising candidates for surface-enhanced Raman spectroscopy (SERS), but currently very few examples of detection of relevant molecules are available. Herein, we show the detection of the lipophilic disease marker beta-sitosterol on few-layered MoTe2 films. The chemical vapor deposition (CVD)-grown films are capable of nanomolar detection, exceeding the performance of alternative noble-metal surfaces. We confirm that the enhancement occurs through the chemical enhancement (CE) mechanism via formation of a surface-analyte complex, which leads to an enhancement factor of approximate to 10(4), as confirmed by Fourier transform infrared (FTIR), UV-vis, and cyclic voltammetry (CV) analyses and density functional theory (DFT) calculations. Low values of signal deviation over a seven-layered MoTe2 film confirms the homogeneity and reproducibility of the results in comparison to noble-metal substrate analogues. Furthermore, beta-sitosterol detection within cell culture media, a minimal loss of signal over 50 days, and the opportunity for sensor regeneration suggest that MoTe2 can become a promising new SERS platform for biosensing.
Subject: MoTe2
SERS
sensing
chemical enhancement
beta-sitosterol
ENHANCED RAMAN-SCATTERING
CHARGE-TRANSFER
EFFICIENT
PLATFORM
LAYER
FILMS
116 Chemical sciences
215 Chemical engineering
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