Department of Physics, University of Kalyani, Kalyani-741235, West Bengal, India.
Nanotechnology. 2013 Mar 29;24(12):125702. doi: 10.1088/0957-4484/24/12/125702. Epub 2013 Mar 4.
Large scale high yield cadmium sulfide (CdS) nanowires with uniform diameter were synthesized using a rapid and simple solvo-chemical and hydrothermal route assisted by the surfactant cetyltrimethylammonium bromide (CTAB). Unique CdS nanowires of different morphologies could be selectively produced by only varying the concentration of CTAB in the reaction system with cadmium acetate, sulfur powder and ethylenediamine. We obtained CdS nanowires with diameters of 64-65 nm and lengths of up to several micrometers. A comparative study of the optical properties of ferroelectric liquid crystal (FLC) Felix-017/100 doped with 1% of CdS nanowires was performed. Response times of the order of from 160 to 180 μs, rotational viscosities of the order of from 5000 to 3000 mN s m(-2) and polarizations of the order of from 10 to 70 nC cm(-2) were measured. We also observed an anti-ferroelectric to ferroelectric transition for CdS doped FLC instead of the ferroelectric to paraelectric transition for pure FLC.
采用快速简便的溶剂热化学法和表面活性剂十六烷基三甲基溴化铵（CTAB）辅助法，成功合成了具有均匀直径的大规模高产率硫化镉（CdS）纳米线。通过仅改变反应体系中 CTAB 的浓度，即可选择性地制备出不同形态的独特 CdS 纳米线，该反应体系的原料为乙酸镉、硫粉和乙二胺。我们得到了直径为 64-65nm、长度可达数微米的 CdS 纳米线。对掺杂了 1%CdS 纳米线的铁电液晶 Felix-017/100 的光学性能进行了比较研究。测量了响应时间约为 160 到 180μs、旋转粘度约为 5000 到 3000mN s m(-2)以及极化约为 10 到 70nC cm(-2)。我们还观察到掺杂 CdS 的铁电液晶发生了反铁电到铁电的转变，而纯铁电液晶则发生了铁电到顺电的转变。
