Proceedings of nanoGe Fall Meeting 2021 (NFM21)
DOI: https://doi.org/10.29363/nanoge.nfm.2021.167
Publication date: 23rd September 2021
Disorder in real materials influences their properties and the chemical processes that occur at their interfaces. In order to unravel, and ultimately control processes at these interfaces, it is essential to gain a molecular-level understanding of the underlying physical manifestations caused by disordered materials. To accomplish this, measurement techniques through which disorder can be detected, quantified, and monitored are needed. However, such quantitative measurements are notoriously difficult, as effects often average out in ensemble measurements. In our lab, we have employed a combination of electrochemical and spatially resolved surface spectroscopy measurements to illuminate a molecular-level picture of disorder in materials. We study amorphous carbon which is an intrinsically disordered material. To the amorphous carbon, we covalently attached a monolayer of ferrocene. Interfacial electron transfer across the amorphous carbon–ferrocene interface is highly sensitive to the local microenvironment felt by the ferrocene, and thus to disruptions of order. By systematically varying linker properties and surface loadings, the influence of lateral interactions between nonuniformly distributed ferrocene headgroups on ensemble electrochemical measurements is gleaned.
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