Abstract
Electrical transport and structural properties of platinum nanowires, deposited using the focussed ion beam method have been investigated. Energy dispersive X-ray spectroscopy reveals metal-rich grains (atomic composition 31% Pt and 50% Ga) in a largely non-metallic matrix of C, O and Si. Resistivity measurements (15-300 K) reveal a negative temperature coefficient with the room-temperature resistivity 80-300 times higher than that of bulk Pt. Temperature dependent current-voltage characteristics exhibit non-linear behaviour in the entire range investigated. The conductance spectra indicate increasing non-linearity with decreasing temperature, reaching 4% at 15 K. The observed electrical behaviour is explained in terms of a model for inter-grain tunnelling in disordered media, a mechanism that is consistent with the strongly disordered nature of the nanowires observed in the structure and composition analysis.
| Original language | English |
|---|---|
| Article number | 215203 |
| Pages (from-to) | 215203:1-215203:5 |
| Number of pages | 5 |
| Journal | Nanotechnology |
| Volume | 18(21) |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - 30 May 2007 |
ASJC Scopus subject areas
- Bioengineering
- General Chemistry
- Electrical and Electronic Engineering
- Mechanical Engineering
- Mechanics of Materials
- General Materials Science