ArticleAnalytical chemistry2017
Characterization of Nanopipet-Supported ITIES Tips for Scanning Electrochemical Microscopy of Single Solid-State Nanopores.
Article in Analytical chemistry, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Review
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- Nanoscale Quantitative Imaging of Single Nuclear Pore Complexes by Scanning Electrochemical Microscopy.Analytical chemistry · 2024Article
- Nanoelectrochemistry at liquid/liquid interfaces for analytical, biological, and material applications.Chemical communications (Cambridge, England) · 2023Review
- Imaging Analysis of Scanning Electrochemical Microscopy in Energy Catalysis.Chemical & biomedical imaging · 2023Review
- Simultaneous Intelligent Imaging of Nanoscale Reactivity and Topography by Scanning Electrochemical Microscopy.Analytical chemistry · 2021Article
- Nanoelectrochemical Study of Molecular Transport through the Nuclear Pore Complex.Chemical record (New York, N.Y.) · 2021Review
- Nanobubble-controlled nanofluidic transport.Science advances · 2020Article
- Nanoelectrochemistry in the study of single-cell signaling.Analytical and bioanalytical chemistry · 2020Review
- Nanoscale Intelligent Imaging Based on Real-Time Analysis of Approach Curve by Scanning Electrochemical Microscopy.Analytical chemistry · 2019Article
- Probing High Permeability of Nuclear Pore Complexes by Scanning Electrochemical Microscopy: CaAnalytical chemistry · 2019Article
- Single Synaptic Observation of Cholinergic Neurotransmission on Living Neurons: Concentration and Dynamics.Journal of the American Chemical Society · 2018Article
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4 authors.
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Abstract
Nanoscale scanning electrochemical microscopy (SECM) is a powerful scanning probe technique that enables high-resolution imaging of chemical processes at single nanometer-sized objects. However, it has been a challenging task to quantitatively understand nanoscale SECM images, which requires accurate characterization of the size and geometry of nanoelectrode tips. Herein, we address this challenge through transmission electron microscopy (TEM) of quartz nanopipets for SECM imaging of single solid-state nanopores by using nanopipet-supported interfaces between two immiscible electrolyte solutions (ITIES) as tips. We take advantage of the high resolution of TEM to demonstrate that laser-pulled quartz nanopipets reproducibly yield not only an extremely small tip diameter of ∼30 nm, but also a substantial tip roughness of ∼5 nm. The size and roughness of a nanopipet can be reliably determined by optimizing the intensity of the electron beam not to melt or deform the quartz nanotip without a metal coating. Electrochemically, the nanoscale ITIES supported by a rough nanotip gives higher amperometric responses to tetrabutylammonium than expected for a 30 nm diameter disc tip. The finite element simulation of sphere-cap ITIES tips accounts for the high current responses and also reveals that the SECM images of 100 nm diameter Si
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