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Surface modification of nanoparticles for sustaining sensitivity of surface-enhanced raman spectrometric measurements in salinated environment
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SYSNO ASEP 0509751 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Surface modification of nanoparticles for sustaining sensitivity of surface-enhanced raman spectrometric measurements in salinated environment Author(s) Týčová, Anna (UIACH-O) ORCID
Přikryl, Jan (UIACH-O) RID, ORCID
Vaňhara, P. (CZ)
Klepárník, Karel (UIACH-O) RID, ORCID
Foret, František (UIACH-O) RID, ORCIDNumber of authors 5 Source Title NANOCON Conference Proceedings - International Conference on Nanomaterials, Volume 2020-October. - Ostrava : Tanger Ltd., 2020 - ISSN 2694-930X - ISBN 978-808729495-6 Pages s. 428-433 Number of pages 6 s. Publication form Print - P Action NANOCON 2019. International Conference on Nanomaterials - Research & Application /11./ Event date 16.10.2019 - 18.10.2019 VEvent location Brno Country CZ - Czech Republic Event type EUR Language eng - English Country CZ - Czech Republic Keywords bi-ligand ; nanoparticle ; saline solution ; surface-enhanced Raman spectrometry Subject RIV CB - Analytical Chemistry, Separation OECD category Analytical chemistry R&D Projects GA17-01995S GA ČR - Czech Science Foundation (CSF) Institutional support UIACH-O - RVO:68081715 UT WOS 000664115400072 EID SCOPUS 85097182335 DOI 10.37904/nanocon.2019.8480 Annotation Surface-enhanced Raman spectrometry (SERS) represents a powerful method for analysis of a broad spectrum of analytes ranging from inorganic ions to biomolecules of high complexity. It combines the potential
of Raman spectrometry for a definite identification of an analyte with remarkable sensitivity achieved by the surface enhancement effect occurring on metal nanoparticles. While low ionic strength influences positively
the sensitivity of the SERS measurement, a higher level of inorganic salts leads to fast ruining of colloidal character, which completely devastates the effect of the surface enhancement. The common stabilization of
nanoparticles by a layer of polymers has a negative impact on the SERS sensitivity since it shields the nanoparticle surface from the analytes. In this work, we aim at the development of the bi-ligand system of
nanoparticles surface modification for improved stability of colloid in saline solution at sustaining the potential for sensitive SERS analyses. The proposed system relies on the binding of 3-mercaptopropionic acid and
thiolated polyethylene glycol in a suitable ratio onto the nanoparticle surfaces. While the short chains of the acid sustain the accessibility of the surface for analytes, the polymeric structures act as a steric barrier
preventing colloid aggregation.Workplace Institute of Analytical Chemistry Contact Iveta Drobníková, drobnikova@iach.cz, Tel.: 532 290 234 Year of Publishing 2021 Electronic address https://www.confer.cz/nanocon/2019
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