title: Biologically templated assembly of hybrid semiconducting nanomesh for high performance field effect transistors and sensors.
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 (~104) 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.
authors.affiliation: Post-Silicon Semiconductor Institute, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea.|Department of Nano Semiconductor Engineering, Korea University, Seoul, 02841, Republic of Korea.
authors.forename: Hye-Hyeon
authors.initials: HH
authors.lastname: Byeon
authors.affiliation: Post-Silicon Semiconductor Institute, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea.
authors.forename: Seung-Woo
authors.initials: SW
authors.lastname: Lee
authors.affiliation: Department of Environmental Science and Engineering, Ewha Womans University, Seoul, 03760, Republic of Korea.
authors.forename: Eun-Hee
authors.initials: EH
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea.
authors.forename: Woong
authors.initials: W
authors.lastname: Kim
authors.affiliation: Post-Silicon Semiconductor Institute, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea.
authors.forename: Hyunjung
authors.initials: H
authors.lastname: Yi