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Graded‐Bandgap Quantum‐ Dot‐Modified Nanotubes: A Sensitive Biosensor for Enhanced Detection of DNA Hybridization
Author(s) -
Feng C.L.,
Zhong X. H.,
Steinhart M.,
Caminade A.M.,
Majoral J.P.,
Knoll W.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200602311
Subject(s) - quantum dot , materials science , biosensor , band gap , nanotechnology , layer (electronics) , dna , membrane , optoelectronics , signal (programming language) , energy transfer , computer science , physics , biology , engineering physics , genetics , programming language
Highly sensitive detection of DNA hybridization is demonstrated for the functionalized nanotubes (NTs) described here. With a cascaded‐energy‐transfer architecture produced by depositing, layer‐by‐layer, three types of Zn x Cd 1– x Se alloy quantum dots (QDs)—that is, graded‐bandgap QDs—into ordered porous alumina membranes (see figure), the NTs provide the ability to detect small but significant changes in the signal during biological detection.