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Published on: May 9, 2014
Lateral quantized charge transfer across nanoparticle monolayers at the air/water interface
Yiyun Yang1, Solulit Pradhan, Shaowei Chen
1Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, Illinois 62901-4409, USA.
Journal of the American Chemical Society
|January 8, 2004
Summary
Quantized charge transfer in gold nanoparticle monolayers at the air/water interface was observed. This phenomenon, exhibiting Coulomb blockade-like behavior, was influenced by surface pressure and particle interactions.
Area of Science:
- Nanotechnology
- Electrochemistry
- Surface Science
Background:
- Gold nanoparticle monolayers offer unique electronic properties.
- Understanding charge transfer at interfaces is crucial for nanoelectronic devices.
Purpose of the Study:
- To investigate lateral quantized charge transfer in gold nanoparticle monolayers.
- To characterize the electronic conductivity and behavior of these particles at the air/water interface.
Main Methods:
- Utilized an interdigitated arrays (IDA) electrode positioned at the air/water interface.
- Employed voltammetry and differential pulse voltammetry to measure electronic conductivity.
- Trapped gold nanoparticle ensembles between IDA fingers for analysis.
Main Results:
- Observed voltammetric responses analogous to Coulomb blockade with a tunable central gap.
- Demonstrated that the Coulomb blockade gap shrinks with increasing surface pressure.
- Identified well-defined voltammetric peaks attributed to single electron transfer events.
Conclusions:
- Lateral charge transfer in gold nanoparticle monolayers exhibits quantized behavior.
- Weak electronic coupling between particles leads to individual electron transfer.
- Surface pressure is a key parameter in controlling charge transfer properties.
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