Effect of Chain Length and the Nature of the Monolayer on the Electrical Behavior of Hydrophobically Organized Gold Clusters
| Autor: | Kunjukrishna P. Vijayamohanan, Nirmalya K. Chaki, Mohammed Aslam, Imtiaz S. Mulla, Renu Pasricha, Thiruvancheril G. Gopakumar, Jadab Sharma |
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| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | The Journal of Physical Chemistry B. 107:13567-13574 |
| ISSN: | 1520-5207 1520-6106 |
| DOI: | 10.1021/jp035032y |
| Popis: | The electronic properties of an array of monolayer-protected gold nanoclusters (ca. 4.8 ± 0.5 nm) are investigated with the variation of chain length and molecular structure of the passivating organic molecules. Here, we use a metal−insulator−(monolayers protected nanoclusters)−insulators−metal junction based on self-assembled monolayers at room temperature in air. Nanoparticles are organized on the hydrophobic surface of self-assembled monolayer (SAM)-modified Au(111) substrates through weak van der Waals interaction. The junction consists of a drop of mercury supporting a SAM, in contact with the hydrophobically organized nanoparticles on the SAM-modified Au(111) substrate, i.e., an Au(111)/SAM//AuMPCs//SAM/Hg. This junction is easy to assemble, mechanically quite stable, and reproducible, where the area of the contact can be generated down to 0.01 mm2 without photolithography. Current−voltage (I−V) results demonstrate a clear Coulomb blockade effect with larger band gaps for clusters passivated with lo... |
| Databáze: | OpenAIRE |
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