title: Graphene-CdS nanocomposites: facile one-step synthesis and enhanced photoelectrochemical cytosensing.
abstract: 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.
authors.affiliation: State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China.
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Zhao
authors.forename: Shiwei
authors.initials: S
authors.lastname: Zhou
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Jiang
authors.forename: Wenhua
authors.initials: W
authors.lastname: Hou
authors.forename: Qingming
authors.initials: Q
authors.lastname: Shen
authors.forename: Jun-Jie
authors.initials: JJ
authors.lastname: Zhu
mesh_terms: D015374:Biosensing Techniques; D019187:Cadmium Compounds / Q000737:chemistry*; D055664:Electrochemical Techniques; D006108:Graphite / Q000737:chemistry*; D006367:HeLa Cells / Q000737:chemistry; D006801:Humans; D053761:Nanocomposites / Q000737:chemistry*; D055668:Photochemical Processes; D012996:Solutions / Q000737:chemistry; D013440:Sulfides / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D012996:Solutions; D013440:Sulfides; C034939:cadmium sulfide; D006108:Graphite