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Regenerative electronic biosensors using supramolecular approaches.


ABSTRACT: A supramolecular interface for Si nanowire FETs has been developed with the aim of creating regenerative electronic biosensors. The key to the approach is Si-NWs functionalized with ?-cyclodextrin (?-CD), to which receptor moieties can be attached with an orthogonal supramolecular linker. Here we demonstrate full recycling using the strongest biomolecular system known, streptavidin (SAv)-biotin. The bound SAv and the linkers can be selectively removed from the surface through competitive desorption with concentrated ?-CD, regenerating the sensor for repeated use. An added advantage of ?-CD is the possibility of stereoselective sensors, and we demonstrate here the ability to quantify the enantiomeric composition of chiral targets.

SUBMITTER: Duan X 

PROVIDER: S-EPMC3665757 | biostudies-literature | 2013 May

REPOSITORIES: biostudies-literature

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Regenerative electronic biosensors using supramolecular approaches.

Duan Xuexin X   Rajan Nitin K NK   Routenberg David A DA   Huskens Jurriaan J   Reed Mark A MA  

ACS nano 20130408 5


A supramolecular interface for Si nanowire FETs has been developed with the aim of creating regenerative electronic biosensors. The key to the approach is Si-NWs functionalized with β-cyclodextrin (β-CD), to which receptor moieties can be attached with an orthogonal supramolecular linker. Here we demonstrate full recycling using the strongest biomolecular system known, streptavidin (SAv)-biotin. The bound SAv and the linkers can be selectively removed from the surface through competitive desorpt  ...[more]

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