关键词：钛白粉；行业升级；潜力

查看摘要 索取原文[1页]

This document is our final technical report and describes the efforts under contract N00014-11-1-0521. The objective of this work was to establish the feasibility of creating solution processed metamaterials formed from composites of semiconductor quantum dots (QDs). The specific goals of this work included, (1) modeling of the metamaterial's optical properties, (2) developing fabrication techniques and (3) experimental characterization of the materials' optical properties. Modeling was first conducted and it was found that under ideal conditions, a high frequency magnetic response could be created in metamaterials formed from composites of quantum dots utilizing excitonic resonances. However, in experimentally fabricated films using cadmium selenide QDs, it was found that the excitonic resonance is significantly broadened, preventing the high index needed to realize metamaterials with tailored effective permittivity and permeability. To overcome this challenge, lead sulfide QDs were then explored due to their high bulk index. Using lead sulfide QDs it was found that a considerably higher effective constituent index could be achieved. However, it was found that thick QD films and multilayer films could not be realized without inducing severe cracking. Patterning of multilayer films was achieved but due to their thin thickness, optical resonances could not be supported.

关键词：电子信息；半导体；纳米材料；低损耗

查看摘要 索取原文[12页]

根据《危险化学品安全管理条例》，危险化学品是指具有毒害、腐蚀、爆炸、燃烧、助燃等性质，对人体、设施、环境具有危害的剧毒化学品和其他化学品。目前列入《危险化学品名录》（2002版）的化学品共分为八大类，3823种，其中列入《剧毒化学品目录》的有335种，化工行业主要大宗原料和产品80%以上属于危险化学品，另外《禁止化学武器公约》监控的化学品绝大部分属于危险化学品。危险化学品既是重要的化工原料，也与人民生活密切相关，在国民经济和社会发展中发挥着不可替代的作用。危险化学品具有生产过程工艺复杂、高温高压、易燃易爆、有毒有害、链长面广等特性，一旦发生事故，不仅会带来人身伤害，还会引起环境污染等次生灾害，直接影响经济发展与社会稳定。“十二五”是加快转变危险化学品发展方式的关键时期，为优化产业布局，规范安全管理，提升本质安全，特制定本规划。本规划是《石化和化学工业“十二五”发展规划》的重要组成部分，是危险化学品发展布局的重要指导性文件。

关键词：危险化学品；十二五；发展；布局；规划

查看摘要 索取原文[15页]

关键词：新型煤化工；发展前景

查看摘要 索取原文[1页]

发改委网站10月31日消息，决定将汽、柴油价格每吨均降低75元，测算到零售价格90号汽油和0号柴油（全国平均）每升均降低0.06元，调价执行时间为10月31日24时；14日，决定将汽、柴油价格每吨分别降低160元和155元，测算到零售价格90号汽油和0号柴油（全国平均）每升分别降低0.12元和0.13元，调价执行时间为11月14日24时。

关键词：石油和化工；要闻综述

查看摘要 索取原文[9页]

Given the many challenges that silicon based transistors are facing in continuedscaling, it has become highly attractive to consider alternate material platforms in thepursuit of high performance electronics, such as InAs for its high electron mobility.Traditionally InAs devices have suffered from many processing difficulties and high offcurrents. However many of these issues have been resolved with the introduction of III-Vnanostructure on insulator platforms. One interesting challenge that remains is the patterned p-type doping of InAs. The scarcity of photolithographically patternable p-typedoping techniques is a major disadvantage of the InAs platform, as it prevents InAs frombeing applied to many known device structures.

关键词：硅基晶体管；高性能电子；InAs设备；隧道场效应晶体管；纳米结构

查看摘要 索取原文[29页]

采用溶剂热法制备了单分散Mn0.6Zn0.4Fe2O4磁性亚微米球,研究了反应工艺参数对磁性亚微米球结构形貌、直径和静磁性能的影响规律.研究发现,随着反应时间的延长,体系中的金属离子首先水解沉淀,形成羟基氧化铁及Mn,Zn氢氧化物,然后脱水转化为Mn0.6Zn0.4Fe2 O4球形纳米粒子,这些纳米粒子发生团聚,形成结构疏松、大小不均匀的亚微米粒子,最后通过Ostwald熟化过程,形成致密的单分散亚微米球.降低反应溶液的pH值、增加乙二醇或聚乙二醇的用量,均会使亚微球的直径增大,并可在150～500 nm范围内调控微球的粒径;但组成磁性亚微球的纳米粒子的粒径逐渐减小,产物的饱和磁化强度增大,矫顽力和剩磁减小.

关键词：锰锌铁氧体；磁性亚微米球；磁性能

查看摘要

以钛酸正丁酯为前驱体,采用静电纺丝技术制得了纯锐钛矿TiO2纤维,并以其为基质,通过水热法制备了具有异质结构的WO3/TiO2复合纤维.利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能量色散光谱仪(EDS)、透射电子显微镜(TEM)和高分辨透射电子显微镜(HRTEM)等对样品的结构和形貌进行了表征.以罗丹明B的脱色降解为模型反应,考察了样品的光催化性能和储能光催化性能.结果表明,花状WO3微球包裹在TiO2纤维上,得到了具有异质结构的WO3/TiO2复合纤维光催化剂.WO3与TiO2复合有利于光生载流子的输运和分离,增强了体系的量子效率,提高了光催化活性.WO3/TiO2复合纤维经光照处理后,在黑暗条件下显示出储能光催化特性.

关键词：静电纺丝技术；水热法；WO3/TiO2复合纤维；储能；光催化降解

查看摘要

设计合成了3条棕榈酸修饰的两亲性多肽C15H31CO-(AEELAKK)3-NH2(PA1),C15H31CO-(AEALAKK) 3-NH2(PA2)和C15H31 CO-(AEELAKA)3-NH2(PA3),研究了其在水溶液中的自组装行为以及带净正电荷的PA2和带净负电荷的PA3等比例混合后的共组装行为,并推测了其机理.圆二色谱分析结果表明,其二级结构均为α-螺旋结构,PA2和PA3等比例混合后α-螺旋含量升高.利用透射电镜观察了PA1,PA2,PA3以及PA2+ PA3(体积比1∶1)自组装体的形貌,结果表明,PA2和PA3等比例混合后共组装形成了长的纳米纤维.芘荧光探针研究了3种两亲性多肽以及PA2+PA3的临界胶束浓度.

关键词：两亲性多肽；α-螺旋；共组装；胶束；纳米纤维；芘荧光探针

查看摘要

川下沿含甲酰基的双取代杯[4]芳烃衍生物与单-6-去氰乙二胺基-β-环糊精进行亲核反应,合成了结构中含一个β一环糊精单元的新型主体分子杯[4]芳烃-β-环糊精席夫碱,其结构经1H NMR,FTIR,MS (Maldi-Tof)表征技术确证.以该化合物为吸附剂,考察了初始质量浓度、体系pH及温度等吸附条件对其吸附碱性品红性能的影响.实验结果表明,吸附条件对杯[4]芳烃-β-环糊精席人碱吸附碱性品红的性能影响响很大,尤其是体系pH和吸吸附温度.在体系pH=4 ～ 11范围内,25℃、体系pH=8时吸附性能最好:在15-45℃范围内,温度低于30℃时,吸附率随温度的升高而增大,30℃后趋于稳定.杯[4]芳烃-β-糊精席人碱对碱性品红的吸附平衡数据在15℃和25℃时符合Langmuir等温模型,35℃时不符合.

关键词：杯[4]芳烃-β-环糊精席夫碱；吸附；碱性品红；染料；废水处理

查看摘要