In this study, we report a novel and facile autoclave strategy for synthesis of near-infrared （NIR） CulnS2 QDs by employing glutathione （GSH） as capping ligand and stabilizer in aqueous media under 100 ~C. Various...In this study, we report a novel and facile autoclave strategy for synthesis of near-infrared （NIR） CulnS2 QDs by employing glutathione （GSH） as capping ligand and stabilizer in aqueous media under 100 ~C. Various experi- mental parameters including the ratio of precursors, reaction time, reaction temperature, pH effect and stability have been systematically studied. The QDs were characterized by X-ray diffraction （XRD）, transmission electron micro- scope （TEM）, and Fourier transform infrared spectroscopy （FT-IR）. The as-synthesized NIR QDs exhibited low cytotoxicity and maintained excellent cell viability even up to 100 gg/mL. After bioconjugation with Arg-Gly-Asp （RGD） peptide, the obtained CulnS2-RGD QDs have demonstrated high targeting ability with good fluorescence cell imaging performance.展开更多
采用溶剂热法在不同反应体系和温度下,制备了一系列Cu In S2(CIS)粉体。CIS粉体的物相、形貌、光吸收性能分别用X射线衍射(XRD)仪、场发射扫描电镜(FESEM)、透射电镜(TEM)、紫外-可见光谱仪(UV-Vis)等手段进行了表征。结果表明,180℃时...采用溶剂热法在不同反应体系和温度下,制备了一系列Cu In S2(CIS)粉体。CIS粉体的物相、形貌、光吸收性能分别用X射线衍射(XRD)仪、场发射扫描电镜(FESEM)、透射电镜(TEM)、紫外-可见光谱仪(UV-Vis)等手段进行了表征。结果表明,180℃时乙醇-硫脲体系所得"绣球"状CIS粉体为黄铜矿结构,而乙二胺-硫化钠体系则为"花簇"状纤锌矿结构,升高溶剂热温度,两者形貌均往"球体"演变;结合XRD,差热(DSC)分析表明纤锌矿CIS具有往黄铜矿CIS转变的趋势,物相转变温度约为453℃;受物相转变影响,纤锌矿CIS的带隙值由黄铜矿的1.43 e V减小至1.35 e V,其可见光吸收能力增强。同时探讨了CIS物相的转变机理。展开更多
以硫化钠、氯化铜、氯化铟为原料,分别以乙醇、乙二醇、乙醇胺、乙二胺为溶剂,采用溶剂热法制备CuInS2纳米粉体,用X射线衍射仪（XRD）、场发射扫描电镜（FESEM）、透射电镜（TEM）、紫外可见–分光光度计（UV-Vis）分析该粉体的微观结...以硫化钠、氯化铜、氯化铟为原料,分别以乙醇、乙二醇、乙醇胺、乙二胺为溶剂,采用溶剂热法制备CuInS2纳米粉体,用X射线衍射仪（XRD）、场发射扫描电镜（FESEM）、透射电镜（TEM）、紫外可见–分光光度计（UV-Vis）分析该粉体的微观结构和光学性能,研究不同溶剂与反应温度对粉末结构与性能的影响。结果表明：在180℃下以乙醇胺或乙二胺为溶剂时,不仅有黄铜矿相CuInS2,还形成纤锌矿相CuInS2;以乙二醇或乙醇为溶剂时,所得粉末为黄铜矿相CuInS2。采用乙二胺为溶剂,当反应温度达到180℃时,粉体中出现部分纤锌矿相CuInS2,粉末呈颗粒状,颗粒尺寸为20~40 nm。采用溶剂热法与化学水浴沉积法相结合的工艺一步合成CuInS2薄膜,薄膜沿（112）晶面择优生长。CuInS2粉体和薄膜的光学带隙范围为1.35~1.56 e V。展开更多
文摘In this study, we report a novel and facile autoclave strategy for synthesis of near-infrared （NIR） CulnS2 QDs by employing glutathione （GSH） as capping ligand and stabilizer in aqueous media under 100 ~C. Various experi- mental parameters including the ratio of precursors, reaction time, reaction temperature, pH effect and stability have been systematically studied. The QDs were characterized by X-ray diffraction （XRD）, transmission electron micro- scope （TEM）, and Fourier transform infrared spectroscopy （FT-IR）. The as-synthesized NIR QDs exhibited low cytotoxicity and maintained excellent cell viability even up to 100 gg/mL. After bioconjugation with Arg-Gly-Asp （RGD） peptide, the obtained CulnS2-RGD QDs have demonstrated high targeting ability with good fluorescence cell imaging performance.
基金supported by the National Natural Science Foundation of China(21073193,21273241,21376195)Project on the Integration of Industry,Education and Research of Guangdong Province,China(2012B091100476)Science and Technology Research Project of Guangzhou,China(2014J4100218)~~
文摘采用溶剂热法在不同反应体系和温度下,制备了一系列Cu In S2(CIS)粉体。CIS粉体的物相、形貌、光吸收性能分别用X射线衍射(XRD)仪、场发射扫描电镜(FESEM)、透射电镜(TEM)、紫外-可见光谱仪(UV-Vis)等手段进行了表征。结果表明,180℃时乙醇-硫脲体系所得"绣球"状CIS粉体为黄铜矿结构,而乙二胺-硫化钠体系则为"花簇"状纤锌矿结构,升高溶剂热温度,两者形貌均往"球体"演变;结合XRD,差热(DSC)分析表明纤锌矿CIS具有往黄铜矿CIS转变的趋势,物相转变温度约为453℃;受物相转变影响,纤锌矿CIS的带隙值由黄铜矿的1.43 e V减小至1.35 e V,其可见光吸收能力增强。同时探讨了CIS物相的转变机理。
基金National Nature Science Foundation of China(50972107,51272059)Zhejinag Province Key Scientific and Technological Innovations Team of China(2009R50010)
文摘以硫化钠、氯化铜、氯化铟为原料,分别以乙醇、乙二醇、乙醇胺、乙二胺为溶剂,采用溶剂热法制备CuInS2纳米粉体,用X射线衍射仪（XRD）、场发射扫描电镜（FESEM）、透射电镜（TEM）、紫外可见–分光光度计（UV-Vis）分析该粉体的微观结构和光学性能,研究不同溶剂与反应温度对粉末结构与性能的影响。结果表明：在180℃下以乙醇胺或乙二胺为溶剂时,不仅有黄铜矿相CuInS2,还形成纤锌矿相CuInS2;以乙二醇或乙醇为溶剂时,所得粉末为黄铜矿相CuInS2。采用乙二胺为溶剂,当反应温度达到180℃时,粉体中出现部分纤锌矿相CuInS2,粉末呈颗粒状,颗粒尺寸为20~40 nm。采用溶剂热法与化学水浴沉积法相结合的工艺一步合成CuInS2薄膜,薄膜沿（112）晶面择优生长。CuInS2粉体和薄膜的光学带隙范围为1.35~1.56 e V。
