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    • 93. 发明公开
    • 유기 흡착제에 의한 금 나노입자 응집체의 크기조절방법
    • 有机表面活性剂对所有纳米颗粒聚集体的尺寸控制方法
    • KR1020070024970A
    • 2007-03-08
    • KR1020050080653
    • 2005-08-31
    • 학교법인 숭실대학교주상우
    • 주상우이강택
    • B82B3/00B82Y30/00
    • B22F1/0096B22F9/24B22F2207/13B22F2301/255B22F2304/054B82Y30/00B82Y40/00
    • A method of adjusting size of gold nano-particle aggregate is provided to form a nano-particle with controlled particle size as desired by using constant amount of citrate as a reductant sufficient to obtain the desired particle size of nano-particle and adding organic adsorbent to the produced nano-particle to form the final aggregate. The method includes steps of (a) adding reductants with varied concentrations to a water solution of MAuX4 wherein M is H, K or Na and X is Cl or Br to form a colloidal solution containing Au nano-particles with varied average diameters; and (b) adding organic adsorbent to the colloidal solution to produce Au nano-particle coagulate by self-assembly of the Au nano-particles. The reductant is citrate or tartrate. The organic adsorbent is aromatic organic adsorbent having functional group selected from -CN, -SH, -NCS and -CNS.
    • 提供调整金纳米颗粒聚集体尺寸的方法,以通过使用恒定量的柠檬酸盐作为还原剂形成具有受控粒度的纳米颗粒,其足以获得所需的纳米颗粒粒径并加入有机吸附剂 生成的纳米粒子形成最终的聚集体。 该方法包括以下步骤:(a)将不同浓度的还原剂加入到MAuX4的水溶液中,其中M为H,K或Na,X为Cl或Br,形成含有不同平均直径的Au纳米颗粒的胶体溶液; 和(b)通过Au纳米颗粒的自组装将有机吸附剂加入到胶体溶液中以产生Au纳米颗粒凝结。 还原剂是柠檬酸盐或酒石酸盐。 有机吸附剂是具有选自-CN,-SH,-NCS和-CNS的官能团的芳族有机吸附剂。
    • 99. 发明授权
    • 수지상금속입자의형성방법
    • KR100451332B1
    • 2004-11-16
    • KR1019980706483
    • 1996-12-13
    • 마이크롤리스 코포레이션
    • 젤러,로버트,에스.브로만,크리스토퍼,제이.
    • B22F1/00B01D39/20B22F3/10
    • B01D67/0041B01D39/06B01D39/2034B01D39/2044B01D39/2075B01D71/022B22F1/0096B22F2009/045B22F2998/10B22F9/04
    • A method for forming dendritic metal powders, comprising the steps of: (1) heating a powder comprising non-dendritic particles, under conditions suitable for initial stage sintering, to form a lightly sintered material; and (2) breaking the lightly sintered material to form a powder comprising dendritic particles. In one embodiment, the lightly sintered material is broken by brushing the material through a screen. Another aspect of the present invention comprises the dendritic particles that are produced by the method described above. These particles can comprise any suitable metal, such as transition metals, rare earth metals, main group metals or metalloids or an alloy of two or more such metals. The particles can also comprise a ceramic material, such as a metal oxide. These particles are characterized by a dendritic, highly anisotropic, morphology arising from the fusion of substantially non-dendritic particles, and by a low apparent density relative to the substantially non-dendritic starting material. The present dendritic particles can be of high purity, and substantially free of carbon contamination.
    • 一种形成树枝状金属粉末的方法,包括以下步骤:(1)在适于初始阶段烧结的条件下加热包含非枝晶颗粒的粉末以形成轻度烧结的材料; 和(2)将轻度烧结的材料破碎以形成包含树枝状颗粒的粉末。 在一个实施例中,轻烧结材料通过将材料刷过筛网而被破坏。 本发明的另一方面包括通过上述方法生产的树枝状颗粒。 这些颗粒可以包含任何合适的金属,例如过渡金属,稀土金属,主族金属或准金属或两种或更多种这样的金属的合金。 颗粒还可以包含陶瓷材料,例如金属氧化物。 这些颗粒的特征在于树枝状,高度各向异性,由基本上非树枝状颗粒的熔合形成的形态,以及相对于基本上非树枝状的起始材料具有低表观密度。 本树枝状颗粒可以具有高纯度,并且基本上没有碳污染。