Integrated carbon nanotube fibre–quartz tuning fork biosensor

Proceedings of the Estonian Academy of Sciences

Rünno Lõhmus¹  Kristjan Saal¹  Margo Plaado¹  Sergei Vlassov¹  Ants Kurg¹  Ilmar Kink¹  Ott Scheler¹ 

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关键词: biosensing;    adsorption;    instrumentation;    protein;    quartz tuning fork;    bovine serum albumin;   

DOI  :  10.3176/proc.2012.1.06

学科分类：化学（综合）

来源: Teaduste Akadeemia Kirjastus

【 摘 要 】

We report on a novel label-free biosensor for in situ measurements in liquid. It is comprised of a porous carbon nanotube (CNT) fibre attached to one prong of a quartz tuning fork (QTF) resonator. Only the protruding CNT fibre is immersed into a liquid, while the QTF is kept above the liquid to avoid short circuit of its electrodes. The low density and large surface area of the CNT fibre assure sufficient sensitivity without affecting the performance of the QTF significantly. Efficiency of the sensor was demonstrated experimentally by comparison of the adsorption rate of bovine serum albumin to the CNT fibre at two different pH values; differences in adsorption rates were clearly distinguishable.

【 授权许可】

Unknown