Number of the records: 1

Toward Graphene-Enhanced Spectroelectrochemical Sensors

SYSNO ASEP	0558258
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Toward Graphene-Enhanced Spectroelectrochemical Sensors
Author(s)	Kaushik, Preeti (UFCH-W) Farjana, Jaishmin Sonia (UFCH-W)_{ORCID, RID} Haider, Golam (UFCH-W)_{ORCID, RID} Thakur, Mukesh Kumar (UFCH-W) Valeš, Václav (UFCH-W)_{RID, ORCID} Kong, J. (US) Kalbáč, Martin (UFCH-W)_{RID, ORCID}
Article number	2200478
Source Title	Advanced Materials Interfaces. - : Wiley - ISSN 2196-7350 Roč. 9, č. 19 (2022)
Number of pages	11 s.
Language	eng - English
Country	DE - Germany
Keywords	methylene-blue ; raman-scattering ; sensitive detection ; surface ; spectroscopy ; intensity ; electron ; spectra ; sers ; charge transfer ; graphene-enhanced Raman spectroscopy ; in situ spectroelectrochemistry ; methylene blue ; spectroelectrochemical sensors
Subject RIV	CG - Electrochemistry
OECD category	Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
R&D Projects	LTAUSA19001 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Method of publishing	Open access
Institutional support	UFCH-W - RVO:61388955
UT WOS	000806713300001
EID SCOPUS	85131304167
DOI	10.1002/admi.202200478
Annotation	Spectroelectrochemical sensors (SPECSs) sensitive to the least amount of sample are crucial for widespread applications, including early-stage detection of fatal diseases and other biomedical applications. However, despite the major disadvantage of biomolecule instability on noble metal nanoparticle-assisted surface-enhanced SPECSs, designing a suitable alternative remains a great challenge. The authors report a proof-of-concept graphene-enhanced spectroelectrochemical sensors (GE-SPECSs) employing graphene-enhanced Raman spectroscopy (GERS). Pristine (p-) and hydrogenated (h-) single-layer graphene (SLG) are utilized to study the oxidized and reduced states of a probe molecule, methylene blue (MB). The hole-doped h-SLG possesses efficient GERS signals compared with p-SLG, resulting in a limit of detection (LOD) < 10(-7) m. By taking advantage of the tunable work function of graphene, the authors demonstrate that the GERS signal from the probe molecule can be varied and different oxidation states of the molecule can be studied by applying suitable external potentials. The LOD obtained in an aqueous system (approximate to 10(-7) m) is comparable with standard surface-enhanced SPECSs. The authors' design thus creates a novel pathway for developing highly efficient, biofriendly, and cost-effective SPECSs.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2023
Electronic address	http://hdl.handle.net/11104/0331986

Number of the records: 1