Preparation, Characterization of Nano/microsturctured Metal Oxides with all Polar Surfaces Exposed via a Molten Salt Route

纳米材料以其独特的物理、化学性质，在近年来成为了全世界科学家关注的热点，纳米材料的性质受其尺寸、形貌、结构、组成以及结晶状况等因素的影响。在对纳米材料尺寸控制方法日趋完善的今天，如何通过控制晶体裸露表面来调控纳米材料的性质成为现阶段进一步获得新型功能材料的另一重要手段。对微小颗粒裸露表面的控制不能使用针对宏观晶体的切割、打磨等手段，而只能通过控制晶体生长的过程来达到这一目的。本论文针对具有极性晶面的离子晶体，提出了一种控制高能极性晶面裸露生长，得到具有特殊性质产物的方法—熔盐法。熔盐法利用高温熔盐中自由离子与晶体极性表面发生静电相互作用，降低极性晶面的表面能进而抑制其生长速度，最终使原本快速生...In recent years, a lot of attentions have been put on nanomaterials for their unique physical and chemical properties. The properties of nanomaterials are mainly determined by its size, shape, composition, crystallinity, and structure. Nowadays, great effort has been devoted to the control of the size of micro-/ nanoparticles to get monodispersed materials, and a lot of successful methods have bee...学位：理学博士院系专业：化学化工学院化学系_物理化学(含化学物理)学号：1912005140308

Development of TOF-MS Used as the Detector of HPLC

本文研制的质谱仪是具有电喷雾离子源和射频四极杆接口的高分辨飞行时间质谱仪(ESI-QQQ-TOF-MS)。该仪器的特点如下:采用可三维调节、带有加热雾化气的电喷雾源液质联用接口;采用由三组四极杆组成、可有效调制离子束的离子光学系统;采用正负双脉冲推斥和垂直引入方式;采用经优化设计的二级有网反射器。该仪器分辨本领优于11 000(Full Width at Half Maximum,FWHM),质量测定精度优于10×10-6,最低检测限低于3 fmol/μL。可作为高效液相色谱优良的质谱检测器。Time-of-flight mass spectrometry(TOF-MS) is widely used in protein chemistry and proteomics research due to its high sensitivity,high resolution and high accuracy.Recently two Q-TOF-MS analytical systems are developed.Both systems are equipped with electrospray ionization source which could be directly hyphenated with HPLC as an outstanding detector.The ESI-triple quadrupole-orthogonal acceleration-reflecting-TOF mass spectrometer has some promising features,such as a ESI source with heatable nebulizer settled on a smart triaxiality moving stage,an excellent ion-optics system composed with triple-quadruple,double-pulse acceleration,and a double stage reflector with homemade grids.The Gramicidin-S sample concentration below to 3 fmol/μL can be identified by these instruments under the optimized conditions.The mass range of these instruments is from 50 u to 6 000 u with a general ESI interface to the HPLC.The optimal mass resolution exceeds 11 000(Full Width at Half Maximum,FWHM) and the signal/noise ratio of reserpine(10 pg/μL) is greater than 100.科技部“十五”科学仪器攻关重大项目(2001BA210A01);; 973基金(01CB510202);; 863重大专项基金(02BAC11A11);; 上海市创新团队基金(03DZ14024);; 上海市重大基础研究(04DZ14005);; 国家自然科学基金(20405003);; 863人肝专项基金(2004BA711A18);; 973人肝新技术基金(2004CB520804)支

Versatile fabrication of aligned SnO2 nanotube arrays by using various ZnO arrays as sacrificial templates

通讯作者地址: Xie, ZX (通讯作者), Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 2. Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 电子邮件地址: [email protected] this paper, we describe an effective two-step method for fabricating aligned SnO2 nanotube arrays by using various pre-synthesized ZnO nanorod arrays as sacrificial templates. The composition and structure of as-synthesized SnO2 nanotube arrays were analyzed in detail by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Because there is a special epitaxial relation between the SnO2 walls and ZnO templates, the walls building the SnO2 nanotubes are highly orientated and nearly single-crystalline. Our present study provides an opportunity to investigate related physical and chemical properties and potential applications of such aligned SnO2 nanotubes with nearly single-crystalline nature.National Natural Science Foundation of China 20725310,20721001 ,20673085,20801045 National Basic Research Program of China 2007CB815303 2009CB939804 Key Scientific Project of Fujian Province of China 2005HZ01-

Growth of Prussian blue microcubes under a hydrothermal condition: Possible nonclassical crystallization by a mesoscale self-assembly

通讯作者地址: Xie, ZX (通讯作者), Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 电子邮件地址: [email protected] classical crystallization process starts from stable nuclei followed by a simple enlargement of the nuclei by unit-cell replication. In recent years, the universality of such classical crystallization has been questioned upon investigations of biomineralization processes, and there are few examples showing that crystal growth may not follow such a classical crystallization process. In this paper, a typical coordination polymer, Prussian blue microcrystals, has been synthesized under hydrothermal conditions. By carefully analyzing the intermediates during the crystal growth process, we found that the growth of Prussian blue under the given growth conditions may follow a nonclassical crystal growth process in which a mesoscale self-assembly of nanocrystallites is included during crystal growth. Such a mesoscale self-assembly process could be a common phenomenon for growth of some crystals with extremely low solubility

港式中文转述动词 “谓、指、话” 的共时状况与历时发展

摘要 “谓、指、话” 是港式中文里典型的转述动词。文章既讨论了它们语义、结构与功能的共时表现，又考察其来源与历时发展变化情况。其中，“谓”是从古代汉语传承至早期现代汉语并沿用至港式中文的；“指” 来自早期现代汉语，是在英语 “point out” 影响下由 “指出” 简缩而来的，可以认为是英源形式；“话” 从古代汉语保留至粤方言继而进入港式中文。“谓、指、话”的产生发展过程表明，文言、粤语、英语是港式中文的主要来源及构成成分，而早期现代汉语则是港式中文的 “底本”。</jats:p

286km 40×10 Gbit/s旁路ROPA系统的研究与应用

为了研究大容量超长跨距无中继光传输技术,采用超低损耗光纤作为传输介质,使用EFEC（增强型前向纠错）技术、Hybrid（混合）光放大器及前置旁路ROPA（远程光泵浦放大器）技术,首次实现了40×10Gbit/s OTN（光传送网）系统286km无中继超长跨距传输,系统连续运行24h无误码。该应用成果为衡量超长跨距大容量光纤传输ROPA系统的性能指标和应用标准等提供了依据

一种路面气象状态传感器

本实用新型属于传感技术领域，涉及一种探测传感装置，用于道路路面以及机场、码头等设施的地面积水、结冰、积雪等情况的监测。该装置包括埋入路面的传感器外桶，在传感器外桶的顶部开口处设置有与路面平接的透明盖板，在传感器外桶内依次设置有激光光源、光学镜组、楔形棱镜以及图像传感器激光光源通过光学镜组分出两路激光光束，楔形棱镜的斜面面向透明盖板下表面，接收来自各个界面向下的反射光束，图像传感器位于楔形棱镜下方用以接收激光光束，图像传感器的输出端还连接有数据处理模块