Structure and physical propertied of nano micelle with the nucleus of multiply twinned particles

我们首先构造了一个真空装置，在该装置中我们可以通过沉积制备多重孪生粒子（MTP）。利用该装置制备的MTP胶束如下：首先将1500a的NaCL沉积在350℃的球形玻璃容器上。在该表面交替沉积100A的Au和1000A的NaCL， MTPs被埋在沉积的NaCL膜中。将硫醇溶液（M β -巯基丙酸：HSCH_2CH_2COOH，10^<-3>mol/1）注入玻璃容器中，MTP被硫醇分子覆盖，形成MTP胶细胞。我们称这种分子组合为“单粒子”。取一滴MTP胶束溶液置于电子显微镜网眼上，干燥后通过透射电镜、电子衍射和扫描电镜观察。绝大多数Au颗粒为平均直径约70A的MTPs。我们观察到一个新的现象，当电子束集中在样品上时，一些MTP胶束开始相互靠近，并在3-5分钟后合并为一个粒子。利用全反射角x射线光谱（TRAXS）分析了MTP胶束的组成，检测了Au和S信号，确定了MTP胶束的结构。我们通过电子能谱（UPS，MIES）研究了MTP胶束，发现羧酸的硫代分子向MTP外伸展。此外，我们还利用核磁共振（NMR）对MTP胶束进行了研究，确定了MTP胶束的结构。指出了MTP胶池在金属涂装材料、柱层析、催化剂、电子器件、化妆品等方面的应用。

We at first constructed a vacuum apparatus in which we can prepare multiply twinned particles (MTP) by deposition. Using this apparatus we made MTP micelle as follows. NaCL of 1,500A were at first deposited on a spherical glass vessel which maintained at 350ﾟC.On this surface, we deposited Au of 100A and NaCL of 1000A alternately and MTPs were buried in the deposited NaCL film. A thiols solution (M beta-mercaptopropionic acid : HSCH_2CH_2COOH,10^<-3>mol/1) was poured into the glass vessel and MTP were covered by thiols molecules, resulting in the MTP micells. We called this moleculer assembly "uni-particles".A drop of the MTP micelle solution was put on a mesh of electron microscope, dried and observed by transmission electron microscope, electron diffraction and acanning electron microscope. Almost of the Au particles were MTPs with average diameter of about 70A.We observed a new phenomenon that when electron beam was concentrated on the sample, some of the MTP micelles started to move to approach in each other and they merged to one particle after 3-5 minutes. We analyzed the composition of the MTP micelles by total reflection angle X-ray spectroscopy (TRAXS) and detected Au and S signals and confirmed the MTP micelle structure. We studied the MTP micelle by electron spectroscopy (UPS,MIES), and obeseved that thiolate molecules of carboxyl acid are stretching toward outside of MTP.Furthermore, we studied the MTP micelle by nucler magnetic resonance (NMR) and confirmed the MTP micelle structure. We have pinted out that the apprication of the MTP micells to metal painting maaterial, column-chromatography, catalytic agent, electronic device, cosmetics etc.