双管气相沉积制备Zn_xCd_(1-x)S纳米棒及其光谱表征(英文)

Zn_xCd_(1-x)S Nanorods Fabricated Through a Double-Tube Vapor-Phase Transport and Their Optical Characteristics

通过物理气相沉积方法在镀金的硅基片上制备了ZnxCd1-xS纳米棒，并用VLS机制对生长机理进行了讨论。XRD分析表明产物是六方相的结晶体SEM观察到纳米棒的长度为3～4微米，直径约为40纳米。PL谱显示有明显的红移现象，分析认为是由于ZnS对CdS晶格的轻微不匹配造成的，同时PL谱的峰型显示产物为ZnxCd1-xS，而不是两者的混合物。该制备方法可以应用于其它三元金属硫化物的制备。

Rapid synthesis of ZnxCdl-xS nanorods has been achieved by a simple thermal evaporation of ZnS and CdS powders, using gold as a catalyst. The vapor-liquid-solid process is proposed for the formation of the ZnxCdl-xS nanorods. XRD analysis reveals that the crystal structure of the product was hexagonal phase. SEM observation shows that the length and width of the ZnxCdl-xS nanorods are in the range of 3～4μm, 40 nm, respectively. The obvious red shift of PL is possibly due to the slightly mismatch of ZnS to CdS lattice. The profile of the PL curves of ZnxCdl-xS indicates that the ZnxCdl-xS products are complex compounds rather than a simple mixture of ZnS and CdS. The synthesis process used in the prsent work is expected to be applicable to the preparation of other ternary sulfides.