Biologically templated assembly of hybrid semiconducting nanomesh for high performance field effect transistors and sensors

Title
Biologically templated assembly of hybrid semiconducting nanomesh for high performance field effect transistors and sensors
Authors
이현정변혜현Seung-Woo LeeEun-Hee LeeWoong Kim
Keywords
Nanomesh; field effect transistors; biosensors; single-walled carbon nanotubes; M13 phage
Issue Date
2016-10
Publisher
Scientific Reports
Citation
VOL 6, 35591
Abstract
Delicately assembled composites of semiconducting nanomaterials and biological materials provide an attractive interface for emerging applications, such as chemical/biological sensors, wearable health monitoring devices, and therapeutic agent releasing devices. The nanostructure of composites as a channel and a sensing material plays a critical role in the performance of field effect transistors (FETs). Therefore, it is highly desirable to prepare elaborate composite that can allow the fabrication of high performance FETs and also provide high sensitivity and selectivity in detecting specific chemical/biological targets. In this work, we demonstrate that high performance FETs can be fabricated with a hydrodynamically assembled composite, a semiconducting nanomesh, of semiconducting single-walled carbon nanotubes (S-SWNTs) and a genetically engineered M13 phage to show strong binding affinity toward SWNTs. The semiconducting nanomesh enables a high on/off ratio (similar to 10(4)) of FETs. We also show that the threshold voltage and the channel current of the nanomesh FETs are sensitive to the change of the M13 phage surface charge. This biological gate effect of the phage enables the detection of biologically important molecules such as dopamine and bisphenol A using nanomesh-based FETs. Our results provide a new insight for the preparation of composite material platform for highly controllable bio/electronics interfaces.
URI
http://pubs.kist.re.kr/handle/123456789/64743
ISSN
2045-2322
Appears in Collections:
KIST Publication > Article
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