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Ultrathin gold nanowire-functionalized carbon nanotubes for hybrid molecular sensing.

ABSTRACT: Carbon nanotubes (CNTs) have shown great potential as sensing component in the electrochemical field effect transistor and optical sensors, because of their extraordinary one-dimensional electronic structure, thermal conductivity, and tunable and stable near-infrared emission. However, the insolubility of CNTs due to strong van der Waals interactions limits their use in the field of nanotechnology. In this study, we demonstrate that noncovalent ultrathin gold nanowires functionalized multiwalled carbon nanotube (GNW-CNT) hybrid sensing agents show highly efficient and selective immune molecular sensing in electrochemical and near-infrared photoacoustic imaging methods. A detection limit of 0.01 ng/mL for the alpha-fetoprotein (AFP) antigen with high selectivity is shown. The extraordinary optical absorption, thermal, and electric conductivity of hybrid GNW-CNTs presented in this study could be an effective tactic to integrate imaging, sensing, and treatment functionalities.

SUBMITTER: Cui H

PROVIDER: S-EPMC3946550 | biostudies-literature | 2013 Sep

REPOSITORIES: biostudies-literature

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Ultrathin gold nanowire-functionalized carbon nanotubes for hybrid molecular sensing.

Cui Huizhong H Hong Chenglin C Ying Andrew A Yang Xinmai X Ren Shenqiang S

ACS nano 20130903 9

Carbon nanotubes (CNTs) have shown great potential as sensing component in the electrochemical field effect transistor and optical sensors, because of their extraordinary one-dimensional electronic structure, thermal conductivity, and tunable and stable near-infrared emission. However, the insolubility of CNTs due to strong van der Waals interactions limits their use in the field of nanotechnology. In this study, we demonstrate that noncovalent ultrathin gold nanowires functionalized multiwalled ...[more]

PMID: 23987824

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