Resistive Switching in Nanogap Systems on SiO2 Substrates
- 14 December 2009
- Vol. 5 (24), 2910-2915
- https://doi.org/10.1002/smll.200901100
Abstract
Voltage‐controlled resistive switching in various gap systems on SiO2 substrates is reported. The nanoscale‐sized gaps are made by several means using different materials including metals, semiconductors, and amorphous carbon. The switching site is further reduced in size by using multiwalled carbon nanotubes and single‐walled carbon nanotubes. The switching in all the gap systems shares the same characteristics. This independence of switching on the material compositions of the electrodes, accompanied by observable damage to the SiO2 substrate at the gap region, bespeaks the intrinsic switching from post‐breakdown SiO2. It calls for caution when studying resistive switching in nanosystems on oxide substrates, since oxide breakdown extrinsic to the nanosystem can mimic resistive switching. Meanwhile, the high ON/OFF ratio (≈105), fast switching time (2 µs, tested limit), and durable cycles show promising memory properties. The observed intermediate states reveal the filamentary nature of the switching.Keywords
This publication has 29 references indexed in Scilit:
- Lithographic Graphitic MemoriesACS Nano, 2009
- Electronic two-terminal bistable graphitic memoriesNature Materials, 2008
- Memristive switching mechanism for metal/oxide/metal nanodevicesNature Nanotechnology, 2008
- Ultralow Feeding Gas Flow Guiding Growth of Large-Scale Horizontally Aligned Single-Walled Carbon Nanotube ArraysNano Letters, 2007
- Nonvolatile Memory Elements Based on Organic MaterialsAdvanced Materials, 2007
- New Charge-Transfer Salts for Reversible Resistive Memory SwitchingNano Letters, 2006
- Switching the electrical resistance of individual dislocations in single-crystalline SrTiO3Nature Materials, 2006
- Electrical contacts to carbon nanotubes down to 1nm in diameterApplied Physics Letters, 2005
- Surface second-harmonic generation from metal island films and microlithographic structuresPhysical Review B, 1981
- New conduction and reversible memory phenomena in thin insulating filmsProceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences, 1967