“直接电子传递”源自碳纳米管与杂质的协同作用

摘要

多壁碳纳米管被众多研究者视为生物燃料电池或酶传感器直接电子传递的根源。但新的实验证据表明，碳纳米管中的金属杂质起着至关重要的作用。葡萄糖氧化酶FAD氧化还原峰在碳纳米管中金属杂质被回流去除之后消失，重新添加金属杂质之后其氧化还原峰又再次出现。所以酶电极的直接电子传递是金属杂质和碳纳米管协同作用的结果。%Mlti -walled carbon nanotubes （MWCNTs） were regarded as the reason of direct electron transfer for enzyme sensor or biofuel cell by many researchers. But a new evidence suggested that metal impurities in MWCNTs played a very important role in this issue.