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Diazonium ion chemistry has been used to electrochemically graft aminophenyl layers onto p-type silicon (100) substrates. A condensation reaction was used to immobilise single-walled carbon nanotubes with high carboxylic acid functionality directly to this layer. The surface immobilised carbon nanotubes were then modified with the tripeptide Gly-Gly-His for the selective detection of copper ions in aqueous environments. The stepwise assembly and sensitivity of this biosensor to copper was characterised by X-ray photoelectron spectroscopy and differential pulse voltammetry, respectively. The ability to detect copper ion concentrations down to 1 μM was demonstrated. As this biosensor combines the advantages of a silicon substrate for easy integration into sophisticated electrical and electronic devices, diazonium salt derived films for stability in aqueous environments and carbon nanotubes for desirable electrochemical properties, it is expected to have important future applications in environmental sensing. |
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至尊木虫 (职业作家)
- 翻译EPI: 110
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- 专业: 金属有机化学
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转弯为你相遇: 金币+30, 翻译EPI+1, ★★★很有帮助 2012-04-19 13:21:07
转弯为你相遇: 金币+30, 翻译EPI+1, ★★★很有帮助 2012-04-19 13:21:07
| 重氮离子已用于化学电化学，将其嫁接到 p 型苯胺图层(100) 硅做衬底。我们用缩合反应制备单壁碳纳米管高羧酸直接导向这一层的功能。然后修改非移动表面碳纳米管与三肽-甘-甘-组氨酸的选择性来检测在水环境中的铜离子。我们用x 射线光电子能谱的特征和微分脉冲伏安来分析铜的自组装和此生物传感器的灵敏度。现在已经能够检测到 1 微米的铜离子浓度。基于这种生物传感器的这些优势，它可方便地集成到复杂的硅衬底的电气和电子设备和派生的重氮盐稳定的水环境和碳薄膜中。这是特殊的具有电化学特性的纳米管，未来将有重要的应用程序环境传感器。 |
2楼2012-04-19 12:49:06
