Název: Surface modification of nanoparticles for sustaining sensitivity of surface-enhanced raman spectrometric measurements in salinated environment
Autoři: Týčová, Anna ; Přikryl, Jan ; Vaňhara, P. ; Klepárník, Karel ; Foret, František
Typ dokumentu: Příspěvky z konference
Konference/Akce: NANOCON 2019. International Conference on Nanomaterials - Research & Application /11./, Brno (CZ), 20191016
Rok: 2020
Jazyk: eng
Abstrakt: 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\nof 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\nthe 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\nnanoparticles 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\nnanoparticles 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\nthiolated 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\npreventing colloid aggregation.
Klíčová slova: bi-ligand; nanoparticle; saline solution; surface-enhanced Raman spectrometry
Číslo projektu: GA17-01995S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: NANOCON Conference Proceedings - International Conference on Nanomaterials, ISBN 978-808729495-6, ISSN 2694-930X
Poznámka: Související webová stránka: https://www.confer.cz/nanocon/2019

Instituce: Ústav analytické chemie AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0300383

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-407867


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav analytické chemie
Konferenční materiály > Příspěvky z konference