Self-assembled shape- and orientation-controlled synthesis of nanoscale Cu3Si triangles, squares, and wires.
Controlling shape and orientation is important for the synthesis of functional nanomaterials. In this work, nanoscale Cu3Si triangles, squares, and wires have been grown on Si(111), (100), and (110) substrates, respectively, through a template-free Au-nanoparticle-assisted vapor transport method. The sides of nanotriangles and nanosquares and the growth direction of the nanowires are all along Si <110>, giving rise to long-range ordering of the nanostructures. Au nanoparticles absorb Cu vapor and facilitate the rate-limited diffusion of Si, which is critical for the shape-controlled growth of Cu3Si. This bottom-up approach to synthesize shape- and orientation-controlled Cu3Si nanostructures might be applicable to the tailored growth of other materials.
Zhang
Zhou
Z
Division of Physics and Applied Physics, Nanyang Technological University, Singapore 637371, Singapore.
Wong
Lai Mun
LM
Ong
Hock Guan
HG
Wang
Xin Jiao
XJ
Wang
Jun Ling
JL
Wang
Shi Jie
SJ
Chen
Hongyu
H
Wu
Tom
T