3—氯丙基三甲氧基硅烷的合成

采用氯铂酸／异丙醇和三苯基膦／环己酮为催化剂，在室温下能够使三氯硅烷与３－氯丙烯迅速发生硅氢加成反应，高产率地生成３－氯丙基三氯硅烷，继而将３－氯丙基三氯硅烷与无水甲醇同时中到沸腾的石油醚中进行醇解，合成了３－氯丙基三甲氧基硅烷。     

合成三氯甲硅烷中多氯硅烷与甲基氯硅烷的形态分析

合成三氯甲硅烷中常含有多氯硅烷类和甲基氯硅烷类物质。目前对它们的研究仅限于理论方面,而实验研究较少。本文采用气相色谱质谱联用技术对合成的三氯甲硅烷中含有的多氯硅烷进行了解析,确认主要成分是六氯乙硅烷,其次是六氯乙硅氧烷和五氯乙硅烷;通过间接测试的方法实现了甲基氯硅烷与三氯甲硅烷、四氯化硅在HP-5ms色谱柱上的完全分离,并确认甲基氯硅烷类主要是甲基二氯硅烷、二甲基氯硅烷、甲基三氯硅烷。     

甲基苯基氯硅烷和苯基三氯硅烷混合物的GC-MS分析

使用GC—MS分析热缩合法生产的氯硅烷粗单体时,发现甲基苯基二氯硅烷和苯基三氯硅烷在HP-5毛细管柱上难以得到有效的分离。采用过量甲醇对粗产品氯硅烷进行甲氧基化后,甲基苯基二氯硅烷和苯基三氯硅烷相应的甲氧基化产物在色谱柱上能得到有效的分离,可为其色谱分析提供依据。     

3－氯丙基三甲氧基硅烷的合成

采用氯铂酸／异丙醇和三苯基膦／环己酮为催化剂，在室温下能够使三氯硅烷与３－氯丙烯迅速发生硅氢加成反应，高产率地生成３－氯丙基三氯硅烷，继而将３－氯丙基三氯硅烷与无水甲醇同时滴加到沸腾的石油醚中进行醇解，合成了３－氯丙基三甲氧基硅烷     

倍半硅氧烷合成进展

对以苯基三氯硅烷、苯基三烷氧基硅烷、甲基三氯硅烷、甲基三烷氧基硅烷、甲基三乙酸基硅烷分别为原料采用碱催化平衡水解三步法合成可溶性高分子量聚倍半硅氧烷及其共聚物进行了综述,并对以苯基三氯硅烷为原料采取一步法合成热塑性聚苯基倍半硅氧烷予以介绍,总结了以不同有机基为原料采用碱催化平衡法合成不溶性立方体聚倍半硅氧烷的研究结果,最后对卤盐催化非水解sol-gel法制备有机倍半硅氧烷凝胶作了阐述,以期对合成不同结构的聚倍半硅氧烷提供帮助。     

聚烯丙基胺硅胶复合材料的合成及其吸附性能

氯丙基三氯硅烷-硅胶;聚烯丙基胺硅胶复合材料的合成及其吸附性能     

梯形苯基/甲基聚倍半硅氧烷树脂的合成及热稳定性研究

以苯基三氯硅烷和甲基三氯硅烷为主要原料,以不同摩尔比(1:1,2:1,3:1)合成了三种梯形聚苯基/聚甲基倍半硅氧烷树脂(1～3),其结构经UV和IR表征.热重分析发现,1～3的热分解温度分别为470 ℃,517 ℃和540 ℃,说明随着苯基三氯硅烷与甲基三氯硅烷摩尔比增大,热稳定性增加.用量子化学方法计算发现苯基硅氧烷的C-Si键长比甲基硅氧烷C-Si键短,且更牢固.     

OTS自组装单分子膜在玻璃表面形成程的AFM研究

运用原子力显微镜研究了十八烷基三氯硅烷在玻璃表面自组装形成单分子膜的过程.通过对样品表面的显微图像、表面平均粗糙度及前进接触角的测量分析,揭示了自组装单分子膜在玻璃表面的生长规律,并探索反应初期玻璃表面的吸附特点.     

手性亚磺酰胺催化不对称硅氢化合成手性β-氨基膦酸酯(英文)

以手性亚磺酰胺作为催化剂,三氯硅烷为还原剂,发展了通过有机小分子催化合成有用的手性β-氨基膦酸酯的方法,获得了较好的产率和对映选择性。     

γ—（乙二胺基）丙基三乙氧基硅烷的合成

γ-(乙二胺基)丙基三乙氧基硅烷是一种新型的偶联剂和交联剂。其合成方法可首先通过γ-氯丙基三氯硅烷与无水乙醇发生醇解反     

CuSO4 Micro-crystal Lattice Produced by Microcontact Printing

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅ ｐｒｅｐａｒａｔｉｏｎｏｆｍｉｃｒｏ ｐａｒｔｉｃｌｅｌａｔｔｉｃｅｗｉｔｈｓｔｒｉｃｔｓｉｚｅｓａｎｄｓｐａｃｅｃｏｎｔｒｏｌｉｓａｎｉｍｐｏｒｔａｎｔｐｒｏｂｌｅｍｔｏｂｅｓｏｌｖｅｄｕｒｇｅｎｔｌｙｉｎｍａｎｙｈｉｇｈ ｔｅｃｈｆｉｅｌｄｓ .Ｔｒａｄｉ ｔｉｏｎａｌｍｉｃｒｏ ｆａｂｒｉｃａｔｉｏｎｍｅｔｈｏｄｉｓｐｈｏｔｏｌｉｔｈｏｇｒａｐｈｙ ,ｂｕｔｉｔｉｓｕｎａｂｌｅｔｏｐｒｏｄｕｃｅａｎｙｐａｔｔｅｒｎｓｏｎａｃｕｒｖｅｄｓｕｒｆａｃｅａｎｄｄｉｆｆｉｃ…     

Liquid templating for nanoparticle organization into complex patterns

Dewetting of thin films of charged polymer solutions produces complex patterns that can be applied to direct nanoparticle organization on solid substrates. The morphology produced by dewetting can be controlled by the solution properties, temperature, and substrate wetting. In this work, new results on this liquid-template self-assembly system are presented, with special emphasis on producing large arrays of organized nanoparticles. On a hydrophilic substrate with complete wetting, the patterns include polygonal networks and parallel-track arrays that extend over several hundreds of microns. These large structures are formed under well-controlled drying conditions and characterized by scanning electron microscopy, which is better suited for the examination of large as well as small areas than atomic force microscopy. On partial wetting substrates, new patterns are observed, including a complex set of parallel curved bands with variable particle number densities.     

Single nanocrystal arrays on patterned poly(ethylene glycol) copolymer microstructures using selective wetting and drying

Single nanocrystal arrays were fabricated on sub-microwells of poly(ethylene glycol) (PEG) copolymer using selective wetting on the hydrophilic regions of the exposed substrate surface and subsequent drying. Templates were produced by molding a thin film of a PEG-based random copolymer on hydrophilic substrates such as glass or silicon dioxide. The polymeric microstructures provide a topographical barrier around the well, which makes it possible to create nanocrystal arrays with controlled geometrical features. The size of the nanocrystal was found to decrease with decreasing well size and also decrease with decreasing topological height. A simple empirical equation was derived to predict the size of the crystal as a function of the pattern size and height, which is in good agreement with the experimental data.     

Facile patterning of upconversion NaYF4:Yb,Er nanoparticles

Different kinds of highly ordered patterns of NaYF(4):Yb,Er nanoparticles on gold substrates were fabricated using a simple method combining micro-contact printing and "breath figures" techniques. Ordered arrays of water droplets were first formed in the hydrophilic regions of patterned self-assembled monolayers (SAMs). This was subsequently submerged in a chloroform solution of NaYF(4):Yb,Er nanoparticles. The particles were spontaneously assembled at the interface of chloroform/water droplet surface, leading to different kinds of uniform patterns after solvent evaporation. The structures of NaYF(4):Yb,Er particles patterns depended on the dimension of the substrate, the concentration of the NaYF(4):Yb,Er nanoparticles and the water condensation process.     

利用去湿现象制备具有SERS活性的银纳米粒子图案

构建了具有表面增强拉曼散射(SERS)活性的二维有序环状与盘状的银纳米粒子结构, 利用CTAB包覆银纳米粒子的氯仿溶液直接在图案化的金基底上进行去湿, 当改变银纳米粒子的浓度时可以得到不同的图案. 利用原子力显微镜(AFM)对其结构进行了表征, 以4-巯基吡啶作为探针分子, 采用表面增强拉曼成像技术研究了这种基底的SERS活性, 这将为SERS的研究开拓新的领域.     

Formation of indium nitride nanorods within mesoporous silica SBA-15

We report the first formation of arrays of InN nanorods inside the nanoscale channels of mesoporous silica SBA-15. In(NO3)3 dissolved in methanol was incorporated into SBA-15 powder without prior pore surface functionalization. Formation of InN nanorod arrays was carried out by ammonolysis at 700 degrees C for 8 h. The final products have been characterized by FT-IR spectra, (29)Si MAS NMR spectra, Raman spectra, XRD patterns, TEM images, nitrogen adsorption-desorption isotherm measurements, and optical spectroscopy. The freestanding InN nanorods observed after silica framework removal with HF solution show diameters of 6-7.5 nm and lengths of 25-50 nm. Formation of a trace amount of In2O3 was also verified. The InN nanorods exhibit a broad band centered at around 550-600 nm, and a band gap energy of 1.5 eV was determined. No light absorption in the near-IR region was measured. The nanorods give a weak emission band centered at around 600 nm. These optical properties are believed to be related to the possible incorporation of oxygen during InN nanorod synthesis.     

沉淀方式对微波辐射老化制备CuO/ZnO/Al2O3催化剂性能的影响

采用微波辐射老化沉淀母液的方法,着重考察了沉淀方式对制备的CuO/ZnO/Al₂O₃催化剂及其前驱体的结构和催化性能的影响。实验结果表明,沉淀方式对催化剂的活性和稳定性影响较大,其活性顺序为分步沉淀法二＞并流共沉淀法＞分步沉淀法一＞反加法＞正加法。通过XRD、DTG、H₂-TPR等表征分析表明,先并流沉淀Al(NO₃)₃溶液和Na₂CO₃溶液,再并流沉淀Cu(NO₃)₂-Zn(NO₃)₂混合溶液与剩下的Na₂CO₃溶液,然后微波辐射老化所制备前驱体中含有更多的绿铜锌矿 (Cu,Zn)₅ (CO₃)₂(OH)₆物相,焙烧后形成的CuO-ZnO协同作用强,且CuO分散性好,H₂还原温度较低,催化活性和稳定性也较高。     

Micrometer scale gel patterns

A novel method for fabricating micrometer sized gel patterns is described. The presented method involves spin-coating a pre-gel solution on a surface that was chemically treated to modulate its surface energy, creating highly hydrophobic areas on a hydrophilic substrate. Following spin-coating, the gel solution self organizes on the hydrophilic sites. This method offers the advantages of high resolution, self-alignment to pre-patterned electrodes, and a simple straightforward fabrication process. Minimum feature size achieved was approximately 20 μm. The characteristic shrinking and swelling times of gel patterns were measured and found to be around 0.6 s for swelling and 2 s for shrinking (for a 60 μm diameter gel) in agreement with the reduced response time expected for scaled down gel patterns. These results suggest the suitability of these gel patterns as valves or actuators in microfluidic devices. Micron-size gel patterns were also incorporated into microfluidic channels thus demonstrating a new approach to create simple, affordable, microfluidic devices, which incorporate “smart” hydrogels as building elements in a simple fashion.     

Self-organized TiO2 nanorod arrays on glass substrate for self-cleaning antireflection coatings

Herein we report the direct fabrication of TiO(2) subwavelength structures with 1-dimensional TiO(2) nanorods on glass substrate through solvothermal process to form self-cleaning antireflection coatings. TiO(2) precursor solutions with different solvent constituents create TiO(2) nanorods with much different morphologies grown on glass substrates. Apiculate TiO(2) nanorods with vertical orientation are grown on the glass substrate which is solvothermally treated in the precursor solution containing ethylene glycol. This glass substrate exhibit the highest transmittance of 70-85% in the range of 520-800 nm and negligible absorption in visible light region (400-800 nm). Furthermore, the TiO(2) nanorod arrays show high hydrophobicity and photocatalytic degradation ability which offer the glass substrate self-cleaning properties for both hydrophilic and oily contaminants.     

Fabrication and self-assembly of hydrophobic gold nanorods

Hydrophobic gold nanorods were fabricated from hydrophilic gold nanorods coated with hexadecyltrimethylammonium bromide by treating with mercaptopropyltrimethoxysilane (MPS) and subsequently octadecyltrimethoxysilane (ODS). The fabrication of the hydrophobic shell went through the process of (1) binding MPS onto the nanorods, (2) hydrolysis of methoxysilanes, and (3) immobilization of ODS by dehydration condensation. The 2- or 3-D ordered structures of hydrophobic nanorods were self-assembled by the evaporation of solvent on a substrate. The aspects of 2-D assemblies were dependent on the concentration of the nanorods, as was seen in transmission electron microscopic images. At a low concentration, the nanorods assembled parallel to the substrate, whereas they stood on the substrate at a high concentration. On the other hand, in a solid of the gold nanorods, the formation of the 3-D assembly was confirmed by small-angle X-ray scattering. The assembly consisted of hexagonal arrays of the gold nanorods and their lamellar accumulation.