Shape-controlled synthesis of single-crystalline nanopillar arrays by template-assisted vapor-liquid-solid process.
Highly regular, single-crystalline nanopillar arrays with tunable shapes and geometry are synthesized by the template-assisted vapor-liquid-solid growth mechanism. In this approach, the grown nanopillars faithfully reproduce the shape of the pores because during the growth the liquid catalyst seeds fill the space available, thereby conforming to the pore geometry. The process is highly generic for various material systems, and as an example, CdS and Ge nanopillar arrays with square, rectangular, and circular cross sections are demonstrated. In the future, this technique can be used to engineer the intrinsic properties of NPLs as a function of three independently controlled dimensional parameters--length, width and height.
Ergen
Onur
O
Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, USA.
Ruebusch
Daniel J
DJ
Fang
Hui
H
Rathore
Asghar A
AA
Kapadia
Rehan
R
Fan
Zhiyong
Z
Takei
Kuniharu
K
Jamshidi
Arash
A
Wu
Ming
M
Javey
Ali
A