CAJ | 학술논문

采用溶剂热法，以 Cd(NO3)2·4H 2 O 和升华硫为镉、硫来源，油胺为反应溶剂和表面活性剂，制备了硫化镉量子点(CdS QDs)，并研究了反应温度、反应时间对硫化镉量子点尺寸的影响。通过 X 射线衍射(XRD)和透射电镜(TEM)对所制备产物的结构和形貌进行了表征。结果表明，所制备的硫化镉量子点结晶度较高，单分散性好，尺寸均一。通过紫外可见吸收光谱(UV-Vis)和荧光光谱(PL)表征了硫化镉量子点随反应温度和时间的变化，结果发现，随反应温度的升高和反应时间的延长，其吸收峰出现了明显的红移，即通过控制反应温度和时间可以控制硫化镉量子点的尺寸和发光颜色。
채용용제열법，이 Cd(NO3)2·4H 2 O 화승화류위력、류래원，유알위반응용제화표면활성제，제비료류화력양자점(CdS QDs)，병연구료반응온도、반응시간대류화력양자점척촌적영향。통과 X 사선연사(XRD)화투사전경(TEM)대소제비산물적결구화형모진행료표정。결과표명，소제비적류화력양자점결정도교고，단분산성호，척촌균일。통과자외가견흡수광보(UV-Vis)화형광광보(PL)표정료류화력양자점수반응온도화시간적변화，결과발현，수반응온도적승고화반응시간적연장，기흡수봉출현료명현적홍이，즉통과공제반응온도화시간가이공제류화력양자점적척촌화발광안색。
Cadmium sulfide quantum dots (CdS QDs ) are synthesized via solvothermal method using Cd(NO3 )2·4H 2 O and sulfur as the precursors and oleylamine as solvent and surfactant.The influnces of the temperature as well as the reaction time on the size of the QDs are also investigated.The crystalline structure and morphology of the products are characterized by powder X-ray diffraction (XRD ) and transmission electron microscopy (TEM).The results show that the as-synthesized CdS QDs possess the properties of high crystallinity,monodispersity,as well as uniform size.The variation of size of CdS QDs with the change of the reaction temperature and the reaction times is investigated by ultraviolet-visible spectrum (UV-Vis)and the photoluminescence (PL)spectrum.The results show that with the increasing of the temperature and the prolongation of the reaction time, the obvious red-shift is observed. It suggests that the size of quantum dots can be adjusted by changing of reaction temperature and reaction time.