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Graphene–CdS Nanocomposites: Facile One‐Step Synthesis and Enhanced Photoelectrochemical Cytosensing
Author(s) -
Zhao Xiaomei,
Zhou Shiwei,
Jiang LiPing,
Hou Wenhua,
Shen Qingming,
Zhu JunJie
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201102379
Subject(s) - nanocomposite , graphene , photocurrent , materials science , photoelectrochemistry , nanotechnology , photoelectrochemical cell , aqueous solution , chemical engineering , electrochemistry , optoelectronics , chemistry , electrode , electrolyte , organic chemistry , engineering
Graphene–CdS (GR–CdS) nanocomposites were prepared in a one‐step synthesis in aqueous solution. The synthetic approach was simple and fast, and it may be extended for the synthesis of other GR–metal‐sulfide nanocomposites. The as‐prepared GR–CdS nanocomposite films inherited the excellent electron‐transport properties of GR. In addition, the heteronanostructure of the GR–CdS nanocomposites facilitated the spatial separation of the charge carriers, thus resulting in enhanced photocurrent intensity, which makes it a promising candidate for photoelectrochemical applications. This strategy was used for the fabrication of an advanced photoelectrochemical cytosensor, based on these GR–CdS nanocomposites, by using a layer‐by‐layer assembly process. This photoelectrochemical cytosensor showed a good photoelectronic effect and cell‐capture ability, and had a wide linear range and low detection limit for Hela cells. The as‐synthesized GR–CdS nanocomposites exhibited obviously enhanced photovoltaic properties, which could be an efficient platform for many other high‐performance photovoltaic devices.