作为电子材料的蛋白质:通过固态蛋白单层连接处传输电子.
Izhar Ron1, Lior Sepunaru, Stella Itzhakov
1Departments of Materials and Interfaces, Weizmann Institute of Science, POB 26, Rehovot 76100, Israel.
Journal of the American Chemical Society
|March 10, 2010
概括
研究人员在上创建了大面积蛋白质单层,用于电子研究. 像阿祖林和巴克蒂奥罗多普辛这样的蛋白质显示出高效的电子运输,这表明生物分子可以用于电子设备.
科学领域:
- 生物物理学的生物物理.
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 电子转移 (ET) 在生物化学中至关重要,通常在水溶液中进行研究.
- 将蛋白质集成到固态连接处可以研究它们的电子导电性.
- 以前的研究经常使用单个分子和扫描探头技术.
研究的目的:
- 开发一种高产量,可重复的方法来制备大面积蛋白质单层连接.
- 为了研究固态设备中不同类型的蛋白质的电子传输特性.
- 探索蛋白质作为电子设备组件的潜力.
主要方法:
- 在一个平台上组装亚苏林 (Az),细菌原素 (bR) 和牛血清白蛋白 (BSA) 的大型单层连接.
- 使用适当的顶部电极进行可重复的电流测量.
- 在蛋白质单层连接处进行电流-电压 (I-V) 测量.
主要成果:
- 在大面积蛋白单层 (Az,bR,BSA) 上获得可重复的电测量.
- 观察到Az和bR之间电流电压特性的相对较小的差异.
- 与BSA相比,通过Az和bR显示出更高效的电子传输 (ETp),甚至BSA显示出比C18链更高的电流.
- 证实了蛋白质在结点内保持了它们的原生形状.
结论:
- 蛋白质可以集成到固态连接中进行电子测量.
- 通过蛋白质单层传输电子是高效的,并建议新的传输机制.
- 像蛋白质这样的生物分子在固态电子设备中显示出作为功能元素的前景.
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