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Stable Cuprous Hydroxide Nanostructures by Organic Ligand Functionalization

Journal Article · · Advanced Materials
 [1];  [1];  [2];  [1];  [1];  [1];  [3];  [1];  [1];  [1];  [4];  [4];  [5];  [1];  [2];  [1]
  1. Department of Chemistry and Biochemistry University of California 1156 High Street Santa Cruz CA 95064 USA
  2. School of Chemical and Biomolecular Sciences Southern Illinois University Carbondale IL 62901 USA
  3. Molecular Foundry Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
  4. School of Engineering University of California 5200 North Lake Road Merced CA 95343 USA
  5. Department of Physics University of California 1156 High Street Santa Cruz CA 95064 USA

Abstract

Copper compounds have been extensively investigated for diverse applications. However, studies of cuprous hydroxide (CuOH) have been scarce due to structural metastability. Herein, a facile, wet‐chemistry procedure is reported for the preparation of stable CuOH nanostructures via deliberate functionalization with select organic ligands, such as acetylene and mercapto derivatives. The resulting nanostructures are found to exhibit a nanoribbon morphology consisting of small nanocrystals embedded within a largely amorphous nanosheet‐like scaffold. The acetylene derivatives are found to anchor onto the CuOH forming CuC linkages, whereas CuS interfacial bonds are formed with the mercapto ligands. Effective electronic coupling occurs at the ligand‐core interface in the former, in contrast to mostly non‐conjugated interfacial bonds in the latter, as manifested in spectroscopic measurements and confirmed in theoretical studies based on first principles calculations. Notably, the acetylene‐capped CuOH nanostructures exhibit markedly enhanced photodynamic activity in the inhibition of bacteria growth, as compared to the mercapto‐capped counterparts due to a reduced material bandgap and effective photocatalytic generation of reactive oxygen species. Results from this study demonstrate that deliberate structural engineering with select organic ligands is an effective strategy in the stabilization and functionalization of CuOH nanostructures, a critical first step in exploring their diverse applications.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515; AC02-05CH11231
OSTI ID:
1905952
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Journal Issue: 8 Vol. 35; ISSN 0935-9648
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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