Liu Aihua, Watanabe Takashi, Honma Itaru, Wang Jin, Zhou Haoshen
Nano-Energy Materials Group, Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba 305-8568, Japan.
Biosens Bioelectron. 2006 Dec 15;22(5):694-9. doi: 10.1016/j.bios.2006.02.006. Epub 2006 Mar 27.
The optimal conditions to prepare water-soluble, stable poly(acrylic acid)-wrapped multiwalled carbon nanotubes (PAA-MWNTs) complex is presented. PAA-MWNTs shows high stability within weak acid to weak basic pH condition. The complex also shows good endurance to moderate ionic strengths in the buffer solution. The PAA-MWNTs complex film-covered electrode demonstrates stable, excellent electrocatalytic activity to oxidize NADH, which makes it possible to prepare NADH sensor at a low potential of approximately 0.13 V (versus Ag/AgCl) with the linear range of 4-100 microM by differential pulse voltammetry.
本文提出了制备水溶性、稳定的聚（丙烯酸）包裹多壁碳纳米管（PAA-MWNTs）复合物的最佳条件。PAA-MWNTs在弱酸至弱碱pH条件下表现出高稳定性。该复合物在缓冲溶液中对中等离子强度也具有良好的耐受性。PAA-MWNTs复合膜覆盖电极对NADH氧化表现出稳定、优异的电催化活性，这使得通过差分脉冲伏安法在约0.13 V（相对于Ag/AgCl）的低电位下制备线性范围为4-100 microM的NADH传感器成为可能。
