期刊
SMALL
卷 8, 期 1, 页码 108-115出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201100931
关键词
charge transfer; electron transport; magnetic properties; nanoparticles; spintronics
类别
资金
- DGA (Direction Generale de l'Armement)
- ANR MAGARRAYS
- NanoSciERA INTERNET
A co-tunneling charge-transfer process dominates the electrical properties of a nanometer-sized slice in a nanoparticle network, which results in universal scaling of the conductance with temperature and bias voltage, as well as enhanced spintronics properties. By designing two large (10 mu m) electrodes with short (60 nm) separation, access is obtained to transport dominated by charge transfer involving nanoslices made of three nanoparticles only. Magnetic iron oxide nanoparticle networks exhibit a magnetoresistance ratio that is not reachable by tunneling or hopping processes, thereby illustrating how such a size-matched planar device with dominant co-tunneling charge-transfer process is optimal for realizing multifunctional devices with enhanced change of conductance under external stimulus.
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