Ultrathin Gold Nanowires

Authored by: Takeo Hoshi , Yusuke Iguchi , Takeo Fujiwara

Handbook of Nanophysics

Print publication date:  September  2010
Online publication date:  September  2010

Print ISBN: 9781420075427
eBook ISBN: 9781420075434
Adobe ISBN:

10.1201/9781420075434-43

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Abstract

Ultrathin nanowires of gold (Au) and other metals have been studied intensively, particularly from the 1990s, as a possible foundation of nano electronics (see Agraït et al. (2003) for a review). They are fabricated as nano-meter-scale contacts within two electrode parts and are composed of a couple of atoms in their wire length and/or diameter. Monoatomic chain, the thinnest wire, was also fabricated. The metal nano-wires can show quantized conductance, even at room temperature, which is completely different from Ohm’s law in macroscale samples. Structural and transport properties of nanowires were investigated by (1) fine experiments, such as high-resolution transmission electron microscopy (HRTEM), scanning tunneling microscope (STM), and atomic force microscopy (AFM) and (2) atomistic simulations with quantum-mechanical theory of electrons. Many experiments and simulations lead us to several common understandings among metal nanowires of various elements (Agraït et al. 2003).

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