Electrochemical field‑effect bio‑transistor based on a multi‑scale electronic nanomesh of single‑walled carbon nanotubes
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서지정보
ㆍ발행기관 : 한국탄소학회
ㆍ수록지정보 : Carbon letters / 33권 / 4호
ㆍ저자명 : Seung‑Woo Lee, Ki‑Sung Cheon, Hyunseok Lee, Kyowook Hwang, Eun‑Hee Lee
ㆍ저자명 : Seung‑Woo Lee, Ki‑Sung Cheon, Hyunseok Lee, Kyowook Hwang, Eun‑Hee Lee
목차
Electrochemical field-effect bio-transistor based on a multi-scale electronic nanomesh of single-walled carbon nanotubesAbstract
1 Introduction
2 Experimental section
2.1 Fabrication of SWNT electronic nanomesh
2.2 Fabrication of the nanomesh-based eFET biosensors
2.3 Characterization and measurement
3 Results and discussion
4 Conclusion
Acknowledgements
References
영어 초록
Single-walled carbon nanotube (SWNT) has gained significant interest as a transducer in various electrochemical sensing devices due to their unique structure, compatibility with biomolecules, and excellent electronic properties. As-prepared SWNTs are usually a mixture of semiconducting and metallic ones. Despite of the higher content of semiconducting components in mixed SWNTs, metallic properties are predominantly expressed due to the bundling issue of the SWNT during the fabrication process, limiting the applicability to bio-transistor application. Here, we present a multi-scale semiconducting electronic film of SWNTs as a transducing platform for electrochemical field-effect-transistor (eFET) suitable for the sensitive detection of subtle biological modulation. A genetically engineered filamentous M13 phage showing strong binding affinity toward SWNTs on its body surface was used as a biological material, allowing us to fabricate a large-scale transparent semiconducting nanocomposite. As the relative ratio of SWNT to M13 phage decreases, the on–off ratio of SWNT electronic film increases by 1200%. To show broad applicability, the multi-scale SWNT nanomesh-based eFET is applied for monitoring a variety of biological reactions in association with enzymes, aptamers, and even cyanobacteria. The biomimetic electronic material system with the capability of transducing biological responses at a large scale over a broad dynamic range holds excellent promise for biosensors, biofuel cells, and environment monitoring.참고 자료
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