Departmental Bulletin Paper シアロ糖鎖修飾による数層グラフェンインフルエンザバイオセンサーの研究開発

河原, 敏男||カワハラ, トシオ||Kawahara, Toshio  ,  玉田, 敦子||タマダ, アツコ||Tamada, Atsuko  ,  中北, 愼一||ナカキタ, シンイチ||Nakakita, Shinichi

28pp.22 - 29 , 2016-03 , 中部大学総合工学研究所
Nano-carbon materials have highly potential for advanced devices because of the many superior properties such as high mobility, high strength and so forth. For nano devices, we can easily fabricate field effect transistors (FETs) with nano-carbon channels. Using FETs, high performance sensors, noise enhanced nonlinear devices has been developed. We have developed several processes to fabricate the field effect transistors for the bio-sensor. One is the self-alignment process using grapho-epitaxy for the nano-carbon channels. Second is the deposition process for the binding molecules for the specific molecules such as avian influenza viruses and human-type ones. In this paper, we have deposited carbon materials by chemical vapor deposition and fabricated FETs using self-alignment process. We discuss about the deposition temperature dependence using the Raman spectroscopy and the measurements of electronic properties such as the drain-source current (IDS). The grapho-epitaxy can enhance the graphene layers growth and also induce the defects caused by the strain in the carbon nanowalls (CNWs). The scattering at the grain boundary could be dominant for the electric properties of CNW-FET. Then we will show the noise spectral analysis. The CNW-FET shows 1/f-type noise in a drain-source current. There are two noise resources in the CNW channels. One relates to environmental noise such as molecular adsorption with large surface area, and the second relates to grain boundary scattering. Higher growth temperatures enlarge the grain size in CNWs, and this results in a decrease in carrier scattering at the grain boundary. In this case, the noise derived from the grain boundary might be small and the total 1/f noise becomes small. On the other hand, influenza virus can detect the structure of the ganglioside to infect the specific host. We will use the glycan as the detection molecules in the bio-sensor. However, for the electronic detection, the size of molecules should be small because of the Debye screening. We have tried to estimate the size of sialyllactose.

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