Unidirectional Photocurrent of Photosystem I on π-System-Modified Graphene Electrodes: Nanobionic Approaches for the Construction of Photobiohybrid Systems

Langmuir : the ACS Journal of Surfaces and Colloids
Sven C FeifelFred Lisdat

Abstract

One major vital element of the oxygenic photosynthesis is photosystem I (PSI). We report on the construction of graphene-based nanohybrid light-harvesting architectures consisting of PSI supercomplexes adsorbed onto π-system-modified graphene interfaces. The light-driven nanophotobioelectrochemical architectures have been designed on a modified carbon surface, on the basis of π-π-stacking interactions between polycyclic aromatic compounds and graphene. As a result of the remarkable features of graphene and the feasibility of purposeful surface property adjustment, well-defined photoelectrochemical responses have been displayed by the nanophotohybrid electrodes. In particular, the PSI-graphene electrodes utilizing naphthalene derivatives provided a suitable surface for the adsorption of PSI and display already at the open circuit potential (OCP) a high cathodic photocurrent output of 4.5 ± 0.1 μA/cm(2). By applying an overpotential and addition of a soluble electron acceptor (methyl viologen), the photocurrent density can be further magnified to 20 ± 0.5 μA/cm(2). On the contrary, the investigated anthracene-based PSI-graphene electrodes exhibit considerably smaller and not very directed photoelectrochemical responses. This stud...Continue Reading

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Citations

Jul 23, 2016·ACS Applied Materials & Interfaces·Abeer AlshammariAdelina Ilie
Jan 6, 2018·Reports on Progress in Physics·Christopher D BostickDavid Lederman
Feb 24, 2021·ACS Applied Materials & Interfaces·Sascha MorlockFred Lisdat
May 26, 2020·Trends in Biotechnology·Alexandra H Teodor, Barry D Bruce
Jul 27, 2021·ACS Biomaterials Science & Engineering·Hyesung LeeSang-Yup Lee
Mar 20, 2019·Journal of the American Chemical Society·Fangyuan ZhaoFelipe Conzuelo
Jan 16, 2021·ACS Biomaterials Science & Engineering·Jiachen YuWenqi Li

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