A combined top-down bottom-up approach for introducing nanoparticle networks into nanoelectrode gaps
| Autor: | Cigang Xu, Wolfgang Haiss, Richard Cosstick, Richard J. Nichols, Andrew Glidle, Jonathan M. Cooper, JianLin Yao, Harm van Zalinge, J. L. Pearson, David R. S. Cumming, María Proupín-Pérez, David J. Schiffrin |
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| Rok vydání: | 2006 |
| Předmět: |
Microscope
Fabrication Bridging (networking) Materials science Mechanical Engineering Nanoparticle Bioengineering Nanotechnology General Chemistry law.invention Mechanics of Materials law Colloidal gold Molecular conductance Electrode General Materials Science Electrical and Electronic Engineering Quantum tunnelling |
| Zdroj: | Nanotechnology. 17:3333-3339 |
| ISSN: | 1361-6528 0957-4484 |
| Popis: | We report here on the fabrication of a three-dimensional array of nanoparticles which bridges the gap between lithographically defined gold electrode contacts separated by 20 nm. The nanoparticle assemblies are formed from about 5 nm gold nanoparticles and benzenedimethanethiol (BDMT) bridging ligands. These assemblies are introduced between the contacts using a layer-by-layer protocol with successive BDMT self-assembly being followed by nanoparticle adsorption until the gap is bridged. The temperature dependent electrical properties of these devices are analysed to establish whether they are consistent with the notion that the networks are built up from molecularly interlinked discrete gold nanoparticles. To aid this analysis the molecular conductance of single bridging molecules is also characterized at room temperature using a recently introduced method based on the scanning tunnelling microscope (STM). From these measurements it is concluded that the room temperature electrical properties of the nanostructured networks are limited by the small interparticle connectivity and the inherent resistance of the linker molecules. |
| Databáze: | OpenAIRE |
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