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카본나노튜브 박막에 미세패턴된 나노입자와 전기화학센서로의 응용

Title
카본나노튜브 박막에 미세패턴된 나노입자와 전기화학센서로의 응용
Other Titles
Nanoparticles-patterned single-walled carbon nanotube thin film and its applications to electrochemical sensor
Author
팜수안헝
Alternative Author(s)
Pham Xuan Hung
Advisor(s)
성기훈
Issue Date
2013-02
Publisher
한양대학교
Degree
Doctor
Abstract
Thin films composed of carbon nanotubes (CNTs) are an emerging class of material with exceptional electrical, mechanical, and optical properties that can be readily integrated into many novel devices. Noble metal NPs/CNTs nanohybrids are a new kind of composite materials which successfully integrate the unique properties of two class materials (CNTs and noble metal NPs) and exhibit some new functions caused by the cooperative effects between the CNTs and noble metal NPs. Therefore, noble metal NPs/CNTs nanohybrids have shown very attractive applications in many fields, especially in heterogeneous catalysis, fuel cells and chemo/biosensors. We refer to the deposition of metal nanoparticles on the single-walled carbon nanotube (SWCNT) thin film to prepare the transparent, flexible and stable as well as high conductivity of nanohybrids electrode. In this thesis, we described a method that allows the deposition of metal nanoparticles and other materials on the SWCNT thin film and demonstrate their application as electrochemical sensor. Electrochemical deposition was used for precise, controllable patterning nanoparticles on SWCNT thin film. In which SWCNT thin film was fabricated by vacuum filtering method and was pre-patterned with photoresist polymer for deposition of metal nanoparticles by standard photolithography. The metal nanoparticles were electrochemically deposited on the pre-patterned SWCNT thin film. The nanohybrid Pd NPs/ SWCNT thin film electrode were used for electrochemical detection of glucose, nitrite. Also, the shape of palladium nanostructures patterned on the SWCNT thin film was controlled by potential adjustment. Moreover, we also fabricated the enzyme-based SWCNT electrode by encapsulating glucose oxidase (GOx) by Nafion binder into the SWCNT film, and the variation in current response as a function of enzyme loading amount, Nafion thickness were investigated. This electrode exhibited a linear electrical response in the range of 0.25 to 3.0 mM, and the detection limit and the sensitivity were assessed to be 97 µM and 9.32 µA mM-1 cm-2, respectively. Finally, we generated an ultrasensitive electrochemical immunosensor based on the silver enhancement and the electrocatalytic activity of silver particles for glucose as enhancing factor. The prepared immunosensor exhibited a good sensitivity, low detection limit and long linear range.
URI
https://repository.hanyang.ac.kr/handle/20.500.11754/134327http://hanyang.dcollection.net/common/orgView/200000421879
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Theses (Ph.D.)
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