量子点天线辅助下蛋白质-色素复合物的增强光收集*

G. Gil, G. Goldoni, S. Corni
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引用次数: 0

摘要

我们预测当组装到量子点(QD)天线时,蛋白质-色素复合物的光收获增强。我们的原型纳米组装装置由含有8种细菌叶绿素(BChl) a染料的Fenna-Mattews-Olson系统和近红外发射CdSexTe(1−x)/ZnS合金核/壳纳米晶体组成。BChl a在绿色和橙红色波段有两个较宽的窗口,吸收能力较差,而大部分的阳光能量恰恰位于这两个窗口。所选择的量子点能够在更宽的波段内有效地收集太阳光,并通过(非辐射)Förster共振能量转移机制将其能量输送到嵌入在蛋白质中的染料上。由于量子点与染料之间的耦合作用,在BChl a较差的吸收窗口中,纳米组装体的吸收得到了显著提高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhanced light-harvesting of protein-pigment complexes assisted by a quantum dot antenna*
We predict the enhanced light harvesting of a protein-pigment complex when assembled to a quantum dot (QD) antenna. Our prototypical nanoassembly setup is composed of a Fenna-Mattews-Olson system hosting 8 Bacteriochlorophyll (BChl) a dyes, and a near-infrared emitting CdSexTe(1−x)/ZnS alloy-core/shell nanocrystal. BChl a has two wide windows of poor absorption in the green and orange-red bands, precisely where most of the sunlight energy lies. The selected QD is able to collect sunlight efficiently in a broader band and funnel its energy by a (non-radiative) Förster resonance energy transfer mechanism to the dyes embedded in the protein. By virtue of the coupling between the QD and the dyes, the nanoassembly absorption is dramatically improved in the poor absorption window of the BChl a.
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