Topography Mapping with Scanning Electrochemical Cell Microscopy.
Anal Chem
; 94(13): 5248-5254, 2022 04 05.
Article
em En
| MEDLINE
| ID: mdl-35312291
ABSTRACT
High-resolution scanning electrochemical cell microscopy (SECCM), synchronously visualizing the topography and electrochemical activity, could be used to directly correlate the structure and activity of materials nanoscopically. However, its topographical measurement is largely restricted by the size and stability of the meniscus droplet formed at the end of the nanopipette. In this paper, we report a scheme that could reliably gain several tens nanometer resolution (≥65 nm) of SECCM using homemade â¼50 nm inner diameter probes. Furthermore, the topography and hydrogen evolution reaction (HER) activity of â¼45 nm self-assembled Au nanoparticles monolayer were simultaneously recorded successfully. This scheme could make mapping of both topologic and chemical properties of samples in the nanometer regime with SECCM routinely, which potentially can largely expand the field of SECCM applications.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Nanopartículas Metálicas
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Ouro
Idioma:
En
Revista:
Anal Chem
Ano de publicação:
2022
Tipo de documento:
Article