Two-dimensional self-organization of an ordered Au silicide nanowire network on a Si(110)-16 x 2 surface.
A well-ordered two-dimensional (2D) network consisting of two crossed Au silicide nanowire (NW) arrays is self-organized on a Si(110)-16 x 2 surface by the direct-current heating of approximately 1.5 monolayers of Au on the surface at 1100 K. Such a highly regular crossbar nanomesh exhibits both a perfect long-range spatial order and a high integration density over a mesoscopic area, and these two self-ordering crossed arrays of parallel-aligned NWs have distinctly different sizes and conductivities. NWs are fabricated with widths and pitches as small as approximately 2 and approximately 5 nm, respectively. The difference in the conductivities of two crossed-NW arrays opens up the possibility for their utilization in nanodevices of crossbar architecture. Scanning tunneling microscopy/spectroscopy studies show that the 2D self-organization of this perfect Au silicide nanomesh can be achieved through two different directional electromigrations of Au silicide NWs along different orientations of two nonorthogonal 16 x 2 domains, which are driven by the electrical field of direct-current heating. Prospects for this Au silicide nanomesh are also discussed.
Hong
Ie-Hong
IeH
Department of Applied Physics, National Chiayi University, Chiayi 60004, Taiwan. ihhong@mail.ncyu.edu.tw
Yen
Shang-Chieh
SC
Lin
Fu-Shiang
FS
D003460:Crystallization / Q000379:methods; D004553:Electric Conductivity; D004563:Electrochemistry / Q000379:methods; D004867:Equipment Design; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008839:Microelectrodes; D016252:Microscopy, Scanning Tunneling; D036103:Nanotechnology / Q000379:methods*; D053770:Nanowires / Q000737:chemistry*; D011312:Pressure; D015203:Reproducibility of Results; D012825:Silicon / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature
D006046:Gold; D012825:Silicon