Regenerative electronic biosensors using supramolecular approaches.
Regenerative electronic biosensors using supramolecular approaches.
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DOI:
10.1021/nn306034f
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发表时间:
2013-05-28
期刊:
影响因子:
17.1
通讯作者:
Reed, Mark A.
中科院分区:
文献类型:
--
作者:
Duan, Xuexin;Rajan, Nitin K.;Routenberg, David A.;Huskens, Jurriaan;Reed, Mark A.
A supramolecular interface for Si nanowire FETs has been developed with the aim of creating regenerative electronic biosensors. The key to the approach are 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 desorption with concentrated β-CD, regenerating the sensor for repeated use. An added advantage of β-CD is the possibility of stereoselective sensors, and we demonstrate here the ability to quantify the enantiomeric composition of chiral targets.
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