Two-phase thermal method for preparation of cadmium sulfide quantum dots
    1.
    发明授权
    Two-phase thermal method for preparation of cadmium sulfide quantum dots 有权
    用于制备硫化镉量子点的两相热法

    公开(公告)号:US07476599B2

    公开(公告)日:2009-01-13

    申请号:US11158111

    申请日:2005-06-21

    IPC分类号: H01L21/20 H01L21/36

    摘要: A two-phase thermal method for the preparation of cadmium sulfide quantum dots where a cadmium source, a sulfur source and a capping agent are heated in water and water-insoluble organic solvents forming a two-phase system. By means of varying reaction time, cadmium sulfide quantum dots of different sizes can be prepared. Quantum dots already obtained can be used as crystal seeds in the reaction of newly added reaction precursor to give larger sized quantum dots with a size distribution similar to that of the initial crystal seeds so as to realize the control of quantum dot size. The quantum dots obtained in the present invention have relatively narrow size distribution, and emit royal purple or blue light under ultraviolet lamp, with a photoluminescence quantum efficiency of from 3 to 60%.

    摘要翻译: 用于制备硫化镉量子点的二相热法,其中镉源,硫源和封端剂在水中加热和形成两相体系的水不溶性有机溶剂。 通过改变反应时间,可以制备不同尺寸的硫化镉量子点。 已经获得的量子点可以用作新添加的反应前体的反应中的晶种,以得到尺寸分布类似于初始晶种的尺寸较大的量子点,以实现量子点尺寸的控制。 在本发明中获得的量子点具有相对较窄的尺寸分布,并且在紫外灯下发出皇家紫色或蓝色光,光致发光量子效率为3至60%。

    Method for preparing organic ligand-capped titanium dioxide nanocrystals
    2.
    发明授权
    Method for preparing organic ligand-capped titanium dioxide nanocrystals 失效
    制备有机配体封端的二氧化钛纳米晶体的方法

    公开(公告)号:US07709540B2

    公开(公告)日:2010-05-04

    申请号:US11293694

    申请日:2005-12-02

    摘要: The present invention belongs to a method for preparing organic ligand-capped titanium dioxide nanocrystals, wherein the method comprises steps of using methyl titanate, ethyl titanate, n-propyl titanate, iso-propyl titanate, butyl titanate or titanium tetrachloride as a titanium source, and with capping by oleic acid or an organic capping agent, reacting the titanium source in an organic non-polar solvent with an aqueous alkaline substance solution in the interface at a temperature of 25 to 280° C. for 0.5 to 240 hrs, thus a transparent sol containing titanium dioxide nanocrystals is obtained, said the titanium dioxide nanocrystals have particle diameters of 1-20 nm. The preparing process has the features of mild reaction conditions and is a simpler and easier method with a shorter preparation period, thereby facilitating the industrialization.

    摘要翻译: 本发明属于制备有机配体封端的二氧化钛纳米晶体的方法,其中所述方法包括使用钛酸钛,钛酸钛,钛酸正丙酯,钛酸异丙酯,钛酸丁酯或四氯化钛作为钛源的步骤, 并用油酸或有机封端剂封端,在25〜280℃的温度下使钛源与有机非极性溶剂与界面中的碱性水溶液反应0.5〜240小时, 得到含有二氧化钛纳米晶体的透明溶胶,所述二氧化钛纳米晶体的粒径为1-20nm。 制备方法具有反应条件温和的特点,且制备时间较短的方法简便易行,从而促进了工业化。

    Liquid-liquid interfacial synthetic method for nanosemiconductor luminous material
    3.
    发明授权
    Liquid-liquid interfacial synthetic method for nanosemiconductor luminous material 失效
    纳米半导体发光材料液 - 液界面合成方法

    公开(公告)号:US07582543B2

    公开(公告)日:2009-09-01

    申请号:US11072322

    申请日:2005-03-07

    IPC分类号: H01L21/20

    摘要: The present invention provides a process for producing a nanosemiconductor luminous material on a liquid-liquid interface, comprising the steps of: a) an oxide of a Group IIB metal and a carboxylic acid with 2-18 carbon atoms or an oleic acid reacting with each other in a solvent at 150-300° C. for 5-30 min, wherein the mol ratio of the oxide to the acid being 1˜5:5˜1; b) adding trioctylphosphine oxide and trioctylphosphine with a mol ratio of trioctylphosphine oxide to trioctylphosphine of 10˜1:1˜10 and a mol ratio of the total mol numbers of trioctylphosphine oxide to the oxide of 10˜1:1˜10; c) adding an aqueous solution of at least one alkaline/alkaline earth metal chalcogenide in a mol ratio of the chalcogenide to the oxide of 10˜1:1˜10; and d) reacting at 20-100° C. for 0.5˜10 h to obtain a sol containing a semiconductor nanoparticle. The produced semiconductor nanoparticle can emit a wavelength-adjustable visible light under a UV lamp.

    摘要翻译: 本发明提供了一种在液 - 液界面上制造纳米半导体发光材料的方法,包括以下步骤:a)IIB族金属的氧化物和2-18个碳原子的羧酸或与各自反应的油酸 在溶剂中在150-300℃下反应5-30分钟,其中氧化物与酸的摩尔比为1〜5:5〜1; b)加入三辛基氧化膦和三辛基氧化膦与三辛基膦的摩尔比为10〜1:1〜10的三辛基膦和三辛基氧化膦与氧化物的总摩尔数的摩尔比为10〜1:1〜10; c)将硫族化物的摩尔比与氧化物的摩尔比为10〜1:1〜10的碱土金属硫族化物中的至少一种添加水溶液; 和d)在20-100℃下反应0.5〜10小时,得到含有半导体纳米粒子的溶胶。 所生产的半导体纳米颗粒可以在UV灯下发出波长可调的可见光。

    Liquid-liquid interfacial synthetic method for nanosemiconductor luminous material
    4.
    发明申请
    Liquid-liquid interfacial synthetic method for nanosemiconductor luminous material 失效
    纳米半导体发光材料液 - 液界面合成方法

    公开(公告)号:US20050221516A1

    公开(公告)日:2005-10-06

    申请号:US11072322

    申请日:2005-03-07

    摘要: The present invention provides a process for producing a nanosemiconductor luminous material on a liquid-liquid interface, comprising the steps of: a) an oxide of a Group IIB metal and a carboxylic acid with 2-18 carbon atoms or an oleic acid reacting with each other in a solvent at 150-300° C. for 5-30 min, wherein the mol ratio of the oxide to the acid being 1˜5:5˜1; b) adding trioctylphosphine oxide and trioctylphosphine with a mol ratio of trioctylphosphine oxide to trioctylphosphine of 10˜1:1˜10 and a mol ratio of the total mol numbers of trioctylphosphine oxide to the oxide of 10˜1:1˜10; c) adding an aqueous solution of at least one alkaline/alkaline earth metal chalcogenide in a mol ratio of the chalcogenide to the oxide of 10˜1:1˜10; and d) reacting at 20-100° C. for 0.5˜10 h to obtain a sol containing a semiconductor nanoparticle. The produced semiconductor nanoparticle can emit a wavelength-adjustable visible light under a UV lamp.

    摘要翻译: 本发明提供了一种在液 - 液界面上制造纳米半导体发光材料的方法,包括以下步骤:a)IIB族金属的氧化物和2-18个碳原子的羧酸或与各自反应的油酸 在溶剂中在150-300℃下反应5-30分钟,其中氧化物与酸的摩尔比为1〜5:5〜1; b)加入三辛基氧化膦和三辛基氧化膦与三辛基膦的摩尔比为10〜1:1〜10的三辛基膦和三辛基氧化膦与氧化物的总摩尔数的摩尔比为10〜1:1〜10; c)将硫族化物的摩尔比与氧化物的摩尔比为10〜1:1〜10的碱土金属硫族化物中的至少一种添加水溶液; 和d)在20-100℃下反应0.5〜10小时,得到含有半导体纳米粒子的溶胶。 所生产的半导体纳米颗粒可以在UV灯下发出波长可调的可见光。

    Two-phase thermal method for preparation of cadmium sulfide quantum dots
    5.
    发明申请
    Two-phase thermal method for preparation of cadmium sulfide quantum dots 有权
    用于制备硫化镉量子点的两相热法

    公开(公告)号:US20070004183A1

    公开(公告)日:2007-01-04

    申请号:US11158111

    申请日:2005-06-21

    IPC分类号: H01L21/20

    摘要: The present invention relates to a two-phase thermal method for the preparation of cadmium sulfide quantum dots. In the method, cadmium carboxylate containing 2 to 18 carbon atoms or cadmium oxide is selected as cadmium source; thiourea or thioacetamide is selected as sulfur source; oleic acid or trioctylphosphine oxide (TOPO) is selected as capping agent, and molar ratio of cadmium source to sulfur source is in a range of from 10:1 to 1:10, and molar ratio of cadmium source to capping agent is in a range of from 1:7 to 1:25. Water and water-insoluble organic compound in equal or similar volume are used as solvents forming a two-phase system. The mixture is heated at 120-180° C. in an autoclave for 0.5 to 24 hrs. By means of varying reaction time, cadmium sulfide quantum dots of different sizes could be prepared. Alternatively, it is also feasible to use quantum dots already obtained as crystal seeds in the reaction of newly added reaction precursor to give larger sized quantum dots with a size distribution similar to that of the initial crystal seeds so as to realize the control of quantum dot size. The quantum dots obtained in the present invention have relatively narrow size distribution, emit royal purple or blue light under ultraviolet lamp, with a photoluminescence quantum efficiency of from 3 to 60%.

    摘要翻译: 本发明涉及制备硫化镉量子点的两相热法。 在该方法中,选择含有2〜18个碳原子的镉或氧化镉作为镉源; 选择硫脲或硫代乙酰胺作为硫源; 选择油酸或三辛基氧化膦(TOPO)作为封端剂,镉源与硫源的摩尔比在10:1至1:10的范围内,镉源与封端剂的摩尔比在一定范围内 为1:7至1:25。 使用相同或相似体积的水和水不溶性有机化合物作为形成两相体系的溶剂。 将混合物在高压釜中在120-180℃下加热0.5至24小时。 通过改变反应时间,可以制备不同尺寸的硫化镉量子点。 或者,在新添加的反应前体的反应中,使用已经作为晶体种子获得的量子点,得到尺寸分布与初始晶种类似的大尺寸量子点也是可行的,以实现量子点的控制 尺寸。 在本发明中获得的量子点具有相对较窄的尺寸分布,在紫外灯下发射紫外或蓝光,光致发光量子效率为3至60%。

    Method for preparing organic ligand-capped titanium dioxide nanocrystals
    6.
    发明申请
    Method for preparing organic ligand-capped titanium dioxide nanocrystals 失效
    制备有机配体封端的二氧化钛纳米晶体的方法

    公开(公告)号:US20060188431A1

    公开(公告)日:2006-08-24

    申请号:US11293694

    申请日:2005-12-02

    IPC分类号: C01G25/02

    摘要: The present invention belongs to a method for preparing organic ligand-capped titanium dioxide nanocrystals, wherein the method comprises steps of using methyl titanate, ethyl titanate, n-propyl titanate, iso-propyl titanate, butyl titanate or titanium tetrachloride as a titanium source, and with capping by oleic acid or an organic capping agent, reacting the titanium source in an organic non-polar solvent with an aqueous alkaline substance solution in the interface at a temperature of 25 to 280° C. for 0.5 to 240 hrs, thus a transparent sol containing titanium dioxide nanocrystals is obtained, said the titanium dioxide nanocrystals have particle diameters of 1-20 nm. The preparing process has the features of mild reaction conditions and is a simpler and easier method with a shorter preparation period, thereby facilitating the industrialization.

    摘要翻译: 本发明属于制备有机配体封端的二氧化钛纳米晶体的方法,其中所述方法包括使用钛酸钛,钛酸钛,钛酸正丙酯,钛酸异丙酯,钛酸丁酯或四氯化钛作为钛源的步骤, 并用油酸或有机封端剂封端,在25〜280℃的温度下使钛源与有机非极性溶剂与界面中的碱性水溶液反应0.5〜240小时, 得到含有二氧化钛纳米晶体的透明溶胶,所述二氧化钛纳米晶体的粒径为1-20nm。 制备方法具有反应条件温和的特点,且制备时间较短的方法简便易行,从而促进了工业化。