Abstract
We report a convenient method for the mass production of single-bundle carbon-nanotube (CNT)-bridged nanorod structures with controlled nanoscale gap. In this research, multisegmented metal nanorods are electrochemically grown on the surface of CNTs that are vertically aligned at inside the pores of anodic aluminum oxide membrane. Selective etching of central nickel (Ni) metal nanorod among three nanorod segments (Au–Ni–Au) provides nanodevice structures with CNT channel in the middle bringing between metal nanorod electrodes on both ends. Our method offers a simple pathway for production of nanoscale gap controlled CNT based devices with desired length of both channel and electrodes. This CNT-bridged nanorod structure holds advantages of each constituent, including the electrical properties of CNTs such as a ambipolar characteristic, and precise growth control and alignment of nanorods. This method provides an easy and convenient approach to fabricate various kinds of nanoscale structure-based electronic devices.
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