Kalyanikutty K P, Gautam Ujjal K, Rao C N R
Chemistry and Physics of Materials Unit, DST Nanoscience Unit and CSIR Centre of Excellence in Chemistry, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India.
J Nanosci Nanotechnol. 2007 Jun;7(6):1916-22. doi: 10.1166/jnn.2007.741.
Two-dimensional nanostructures in the form of ultra-thin crystalline films of CdSe and CuSe have been prepared at the organic-aqueous interface by reacting toluene solutions of metal cupferronates with an aqueous solution of N,N-dimethyl selenourea. The films have been examined using electron microscopy and optical spectroscopy. At lower concentrations of the reacting species, the CdSe films formed at the toluene-water interface at approximately 30 degrees C consisted mostly of nanocrystals. With increase in concentration as well as temperature, the interface reaction yielded thicker films which are mostly single-crystalline. We have studied the time-dependent growth of the CdSe film at the interface using UV-visible absorption spectroscopy. Ultra-thin films of CuSe formed at the toluene-water interface are generally single-crystalline.
通过使金属铜铁试剂的甲苯溶液与N，N-二甲基硒脲水溶液反应，在有机-水界面制备了CdSe和CuSe超薄晶体薄膜形式的二维纳米结构。已使用电子显微镜和光谱学对这些薄膜进行了检测。在较低浓度的反应物条件下，在约30℃的甲苯-水界面形成的CdSe薄膜主要由纳米晶体组成。随着浓度和温度的增加，界面反应产生了更厚的薄膜，这些薄膜大多是单晶的。我们使用紫外-可见吸收光谱研究了CdSe薄膜在界面处随时间的生长情况。在甲苯-水界面形成的CuSe超薄薄膜通常是单晶的。
