4.8 Article

Vertically Aligned Nanoplates of Atomically Precise Co6S8 Cluster for Practical Arsenic Sensing

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ACS MATERIALS LETTERS
卷 -, 期 -, 页码 893-899

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AMER CHEMICAL SOC
DOI: 10.1021/acsmaterialslett.3c00085

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We successfully synthesized vertically aligned nanoplates of the [Co6S8DPPE6Cl6] cluster (Co6) using ambient electrospray deposition (ESD). These nanoplates demonstrate sensitive and selective electrochemical response toward arsenite at concentrations as low as 5 parts per billion. Our work sheds light on the preferential binding of arsenite with Co6, revealing a practical application of atomically precise clusters with societal relevance.
Two-dimensional nanostructures with atomically precise building blocks have potential applications in catalysis and sensing. However, structural instability and surface reactivity limit their practical use. In this work, we demonstrate the formation of vertically aligned nanoplates of the [Co6S8DPPE6Cl6] cluster (Co6 in short), protected by 1,2bis(diphenylphosphino)ethane, using ambient electrospray deposition (ESD). Charged microdroplets of Co6 formed by ESD on a water surface created such nanostructures. Preferential arrangement of clusters in the nanoplates with enhanced surface area results in sensitive and selective electrochemical response toward arsenite down to 5 parts per billion, in tap water. Density functional theory calculations reveal the preferential binding of arsenite with Co6. Our work points to a practical application of atomically precise clusters of large societal relevance.

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