Project description

Based on the preliminary work and results presented in the following, the research project C9(N) shall demonstrate that and how the adaptable, multiscale metamaterial "nanoporous gold" can act as an efficient emitter material of photonically generated electronic deficits (holes). These holes are expected to cause or enhance oxidation reactivities occurring in the pore space, with the potential- and illumination-dependent interfacial transmission current, i.e., photocurrent, serving as the key metric for evaluating transfer efficiency. Nanoporous gold, which is widely investigated in SFB 986, offers crucial advantages over other nanomaterials in this respect, enabling the understanding of photonic excitation and transfer processes in the first place, and will be characterized with respect to its potential applicability as a photoanode material. Taking advantage of the multiscale modifiability (macroscale designable films with mesoscale adjustable ligament size and variability of the few nanometer thick interface by adsorbate or different semiconductor layers), an understanding of the hole transfer mechanisms in a neighboring electrolyte shall be obtained and thus be the basis for the design of a broadband effective and efficient photoanode. The interactions between processes on different size scales are currently the subject of basic scientific discussion as well as central to SFB 986, so that the C9(N) project fits in synergistically.



Project leaders
Prof. Dr. rer. nat. Manfred Eich,
Dr. Nadiia Mameka,

nanoporous gold



photoanode material

hole emission



1. M. Graf et al.: Direct and Broadband Plasmonic Charge Transfer to Enhance Water Oxidation on a Gold Electrode. ACS Nano 15, 2, 3188-3200 (2021)
DOI: 10.1021/acsnano.0c09776 - with A4 and B10

... and more on the list of publications.