一个非共价策略,用于组装超分子光电产生系统
Ernesto Soto1, John C MacDonald, Christopher G F Cooper
1Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, Worcester, Massachusetts 01609, USA.
Journal of the American Chemical Society
|March 6, 2003
概括
研究人员开发了用于光电流生成的新型薄膜. 非联组装的片比联组装的片效率更高,这表明分子电子设备的组装方法更简单.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 摄影化学的使用.
背景情况:
- 开发高效的光电流生成薄膜对于分子电子学至关重要.
- 对于这样的设备来说,大分子的共价组合可能是具有挑战性的.
- 自组装单层 (SAM) 为构建功能性薄膜提供了一个平台.
研究的目的:
- 为了比较共振组装膜与非共振组装多层膜的光电流生成效率.
- 调查金属-合体复合的潜力,以创建有序,无缺陷的薄膜.
- 探索分子电子设备的替代组装方法.
主要方法:
- 在黄金表面上组装三个不同的薄膜 (SAM I,II和III).
- 萨姆I:化物修饰的烯染色体的共价组合.
- 电影II和III:非共价组合使用金属-连接体复合.
- 使用循环电压测量和接触角测量进行表征.
- 在受控光刺激 (350nm灯) 下进行光电流生成测量.
主要成果:
- SAM I,一种共组装的薄膜,产生了在5-10 nA/cm2范围内的光电流.
- 非性组装的薄膜 (II和III) 产生了更高的光电流 (10-30 nA/cm2).
- 电影II和III的量子效率大约为1%.
- 循环电压测量和接触角度数据显示,II和III片中有最小缺陷的有序层.
结论:
- 通过金属连接体复合的非共价组合提供了一个有效的途径,可以创建有序的,无缺陷的薄膜.
- 与传统的共价组件相比,这种方法可以实现与传统的共价组件相比,可比或优越的光电流生成.
- 非共价组装为克服从大分子制造分子电子设备的挑战提供了一个有希望的替代方案.
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