alexa Nanowire Memristor | 14732
ISSN: 2157-7439

Journal of Nanomedicine & Nanotechnology
Open Access

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3rd International Conference on Nanotek & Expo
December 02-04, 2013 Hampton Inn Tropicana, Las Vegas, NV, USA

Takeshi Yanagida
Accepted Abstracts: J Nanomed Nanotechnol
DOI: 10.4172/2157-7439.S1.015
Abstract
Self-assembled one-dimensional ?nanowires? have attracted much attention not only for their nanoscale-confided physical properties but also for novel nano-device applications. Group VI and III-V compounds nanowires have proven their great promises for exploring fundamental physical properties at nanoscale and also the feasibility of diverse nano-device applications. There are several reasons why nanowires have attracted much attention from diverse research communities ranged from physics, chemistry, material science, electrical engineering, chemical engineering and others. First, the size scale can be easily down to several nanometers, where conventional lithographic technologies are not feasible. Second is the variation of material employed to be one. Metal oxides exhibit their rich variety of physical properties including ferroelectric, ferromagnetic, high- Tc superconducting, memristive switching, which are hardly attainable to other materials. Among them, resistance switching (RS) memory effect, which occurs within a metal/oxide/metal junction, so called ?memristive switching?, have attracted much attention due to the potential applications not only for next generation non-volatile memories alternative to current flash memory technology but also for artificial neural computing systems beyond Boolean computing. Although the importance of nanoscale physical events on RS has been highlighted in previous works using thin film RS devices, investigating the occurrence of RS at nanoscale beyond the limitation of current lithographic length scales and extracting the exact nanoscale RS mechanisms have been difficult. However such knowledge as to nanoscale RS events is crucial to achieve reliable and high-density RS devices. Self- assembled oxide nanowire-based RS offers an alternative approach not only to reduce the size of the cells beyond the limitation of current lithographic length scales but also to extract the underlying nanoscale RS mechanisms. Here we report the fabrication of well-defined oxide nanowires via VLS mechanisms, the construction of heterostructured oxide nanowires and the nonvolatile resistive memory switching phenomena within a single oxide nanowire down to 10 nm scale. Single crystalline NiO x and CoO x heterostructured nanowires were fabricated by newly developed in-situ formation technique. We constructed highly stable RS junctions with the endurance up to 10 8 by utilizing self-assembled nanowires and well-defined nano-gap electrodes. The importance of nanoscale redox events was clarified for the bipolar RS. The presented approaches by utilizing self-assembled oxide nanowire/metal junctions offer an important system and platform to investigate not only nanoscale RS mechanisms but also various nanoscale confined physical properties of transition metal oxides
Biography
Takeshi Yanagida has completed his Ph.D. from Teesside University. He is Associate Professor in Osaka University. He has published more than 100 papers in reputed journals
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