Carbon Nanotube network-based biosensor

• Main Authors: Chiaming Chang, 張家銘
• Other Authors: C. M. L
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/10601736328531179601

碩士 === 中國文化大學 === 材料科學與奈米科技研究所 === 98 === Abstract In this thesis, we study the electric property of bio-sensor which was made by the carbon nanotubes (CNTs). We measure the transport property of the CNTs which links the electrodes and we expect that the high surface/ volume rate and high conductivity of CNTs can enhance the electronic transportation of the bio-sensor. In order to improve the sensitivity, we combine the CNTs with 1-Pyrenebutanoic acid, succinimidyl ester to form a bio-probe. We use several organic solvent to separate the CNTs such as methanol, ethanol, IPA and chloroform. But the CNTs only can be separated by ethanol without recombination after stayed one month. In this work, we use several methods to product the bio-sensor substrates. The best substrates are glass fiber plane and the electrodes are made by wet etch method with 50μm gaps. In our experimental results, it shows that the conductivity can be increased by the diffusing more CNTs into the gap. Based on the Raman and FTIR data, only the IPA solution adds 1-Pyrenebutanoic acid, succinimidyl ester which can successfully modify the structure of CNTs and improve the conductivity of bio-probe. The current density of the bio-probes can keep stably in 30 min after dropping the CNTs and it can only decay less than 10% after 6 months. Keywords: bio-sensor, carbon nanotube and transport property.