研究目的
Investigating the properties of molecular junctions fabricated on a large array of sub-10 nm single crystal Au nanodot electrodes to address pending issues in molecular electronics, including the determination of inter-molecular interactions and the demonstration of molecular electronic devices for high-frequency operation.
研究成果
Nanodot-molecule junction is a powerful test-bed, in association with scanning probe microscopes (C-AFM, iSMM), to measure electron transport properties through molecules at the nano-scale and at high frequencies.
研究不足
The study is limited by the complexity of mechanisms such as atomic details of the molecule/electrode contact geometry, molecular conformation, and molecule-molecule interactions that can interplay in a complex way.
1：Experimental Design and Method Selection:
The study utilizes nanodot-molecule junctions (NMJ) fabricated from a large array of sub-10 nm single crystal Au nanodot electrodes, with each individual NMJ consisting of less than one hundred molecules. Conductance histograms and 2D histograms of the current-voltage (I-V) curves are extracted from measurements.
2：Sample Selection and Data Sources:
The study involves electrochemical and conductance measurements on a large array of ferrocene-thiolated gold nanocrystals.
3：List of Experimental Equipment and Materials:
Conducting-AFM (C-AFM) and interferometric scanning microwave microscope (iSMM) are used for measurements.
4：Experimental Procedures and Operational Workflow:
The combination of a large array of single-crystal gold nanoelectrodes and an iSMM is used to perform a statistical study on hundreds of diodes.
5：Data Analysis Methods:
The measured S11 parameters exhibit a diode rectification ratio, which is related to the DC conductance and aF range fringing capacitance of the molecular junctions.
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