Developing de novo architectures of photosynthetic complexes for the control of photocurrent output from reaction centres.

开发光合复合物的从头结构，用于控制反应中心的光电流输出。

• 批准号: 2108861
• 金额: --
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2108861
• 关键词: Developing; de; novo; architectures; photosynthetic

In photosynthesis, solar energy is absorbed by chlorophyll binding light-harvesting (LH) antenna complexes (1), which channel it as excitation energy towards the reaction centres (RCs), initiating a series of electron transfer reactions that allow storage of the energy in chemical form. Photosynthetic RCs operate with a quantum efficiency of 85-98%, far outstripping their artificial competitors. Thus, there is great interest in incorporating these RC's into bio-hybrid devices to generate electric current. Recently, we developed robust and low-cost techniques for micro- and nano-patterning of photosynthetic complexes onto self-assembled monolayers (SAMs) deposited on gold, glass, silicon or graphene substrates (2, 3). By using fluorescence lifetime imaging (FLIM), we have demonstrated the ability of these fabricated architectures of RCs and LH complexes to transfer excitation energy on the micron distance scale, far in excess of anything seen in nature (4), and to reversibly switch between high and low efficiency modes based on manipulation of the environmental conditions (2)

在光合作用中，太阳能被叶绿素结合捕光天线复合体(1)吸收，后者将太阳能作为激发能量输送到反应中心(RCS)，引发一系列电子转移反应，允许以化学形式存储能量。光合作用RCS的量子效率为85%-98%，远远超过了它们的人造竞争对手。因此，将这些RC集成到生物混合装置中以产生电流是非常有兴趣的。最近，我们发展了强大和低成本的技术，将光合作用复合体微纳图案化到沉积在金、玻璃、硅或石墨烯衬底(2，3)上的自组装单分子膜(SAM)上。通过使用荧光寿命成像(FLIM)，我们已经证明了这些制作的RCS和LH型络合物的结构能够在微米距离尺度上传递激发能量，远远超过自然界中所见的任何东西(4)，并且能够基于对环境条件的操纵在高效率和低效率模式之间可逆地切换(2)。