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Biosensor Based on Ultrasmall MoS sub( 2) Nanoparticles for Electrochemical Detection of H sub( 2)O sub( 2) Released by Cells at the Nanomolar Level

Monodispersed surfactant-free MoS2 nanoparticles with sizes of less than 2 nm were prepared from bulk MoS2 by simple ultrasonication and gradient centrifugation. The ultrasmall MoS2 nanoparticles expose a large fraction of edge sites, along with their high surface area, which lead to attractive elec...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 2013-01, Vol.85 (21), p.10289-10289
Main Authors: Wang, Tanyuan, Zhu, Haichuan, Zhuo, Junqiao, Zhu, Zhiwei, Papakonstantinou, Pagona, Lubarsky, Gennady, Lin, Jian, Li, Meixian
Format: Article
Language:English
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Summary:Monodispersed surfactant-free MoS2 nanoparticles with sizes of less than 2 nm were prepared from bulk MoS2 by simple ultrasonication and gradient centrifugation. The ultrasmall MoS2 nanoparticles expose a large fraction of edge sites, along with their high surface area, which lead to attractive electrocatalytic activity for reduction of ... An extremely sensitive ... biosensor based on MoS2 nanoparticles with a real determination limit as low as 2.5 nM and wide linear range of 5 orders of magnitude was constructed. On the basis of this biosensor, the trace amount of ... released from Raw 264.7 cells was successfully recorded, and an efficient glucose biosensor was also fabricated. Since ... is a byproduct of many oxidative biological reactions, this work serves as a pathway for the application of MoS2 in the fields of electrochemical sensing and bioanalysis. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0003-2700