Silicon nanowires (SiNWs) are a type of one-dimensional silicon-based nanostructures with diameters smaller than 100 nm and length of micrometer or even longer. SiNWs feature many attractive properties including excellent electronic/mechanical properties, favorable biocompatibility, huge surface-to-volume ratios, surface tailorability, improved multifunctionality, as well as their compatibility with conventional silicon technology.
Metal-catalyzed vapor-liquid-solid (VLS) (Wu and Yang
) and oxide-assisted growth (OAG) (Zhang et al.
) are widely recognized as two classic methods for synthesizing silicon nanowires (SiNWs) (He et al.
). In 1998, the groups of Lieber (Morales and Lieber
) and Lee (Zhang et al.
) independently reported the method of laser ablation-assisted VLS growth for the synthesis of single-crystal SiNWs with diameters of 6–20 nm and lengths ranging from 1 to 30 μm, realizing the first large-quantity...