烃基咪唑和吡啶鎓氢氧化物碱性离子液体的合成

以KOH或NaOH作碱试剂,考察了溶剂对1-丁基-3-甲基咪唑溴鎓([bmim]Br)合成1-丁基-3-甲基咪唑鎓氢氧化物([bmim]OH)碱性离子液体的影响,并采用强碱性阴离子交换树脂法合成[bmim]OH.结果表明:在室温下,溶剂10mL,[bmim]Br和KOH的物质的量之比为1:1.1的条件下,以乙醇为溶剂反...     

The photoresponse and photoconductivity of micron-sized C60 whiskers and sub-millimeter-sized C60 clusters

The photoresponse and photoconductivity properties of micron-sized C60whiskers and sub-millimeter-sized C60clusters are successfully studied by the microfabrication technologies.According to the ultraviolet-visible-near infrared（UVVis-NIR）absorption spectroscopic study,a highly intense absorption is observed in the UV and visible light regions,which indicates probable applications in photoelectric devices.Furthermore,a large photocurrent is measured under the illumination of white light in nitrogen（N2）atmosphere.The micron-sized C60whiskers and the sub-millimeter-sized C60clusters have different photoresponse curves under the same condition of measurement.A quick transformation of photoelectric response is detected in parallel multi-arranged micron-sized C60whiskers,but the recovery of the photocurrent of self-assembly sub-millimeter-sized C60clusters is much slower.     

Fabrication of high aspect ratio gratings for X-ray imaging

Grating-based X-ray imaging system is an important tool to investigate the inner structure of thick samples. The key components of the system consist of three golden gratings. The high aspect ratio gratings are fabricated using the SU-8 material. Considering the grating linewidth broadening varies with exposure dose, the relationship between linewidth broadening and exposure dose is studied experimentally. A series of gratings with different periods and different duty cycles are designed by optimizing the linewidth and exposure dose. Finally, the gratings are successfully fabricated by combining UV lithography and electroplating.     

高效液相色谱-串联质谱法测定油辣椒中罗丹明B

建立了油辣椒中罗丹明B的高效液相色谱-串联四极杆质谱联用测定方法,该方法经乙腈提取样品,以waters-C18柱（2.1×50mm,1.7μm）分离,流动相为甲醇-0.1%甲酸水,电喷雾正离子MRM模式检测。方法检出限0.1ng/mL,线性范围0.1μg/L～10μg/L,加标回收率99.5%～106.4%,相对标准偏差为1.08～3.07%。     

ZnO纳米结构薄膜的三阶非线性折射特性

采用直流溅射法在石英基片上制备了ZnO纳米结构薄膜。X射线衍射(XRD)谱表明ZnO尺寸约为5nm。利用Z 扫描技术,以锁模Nd:YAG激光器作光源(脉宽35ps,波长为355nm),在共振区域测定了ZnO纳米薄膜的三阶非线性光学常数,其非线性光学折射率常数n2=-5.7×10-8esu。     

注重培养创新型年轻高校教师 实现我国服装人才跨越式发展

目前,我国开办服装专业的高校还存在不少弊端,在硬件和软件上都还存在着很多的不足,服装人才培养上还有许多问题值得思考。对高校服装专业青年教师的培养现状进行了分析,并提出相应的策略。     

美国区域高超声速导弹防御方案未来发展分析

随着高超声速武器的装备部署,美国正在发展高超声速防御体系,推进区域高超声速导弹防御能力的快速装备。研究了美国区域高超声速分层防御方案的主要装备、性能及研制进展,总结了美国区域高超声速防御方案的作战场景和主要作战模式。通过分析可以看出,美国将在2025年左右形成针对区域高超声速武器的末段防御能力,2030年左右初步建成分层防御能力。     

基于行为需求的成都东门市井街区公共空间优化研究

随着城市旅游的发展,人们对城市的特色街区公共空间的需求逐渐增加,探究游客在街区中的停留时长和空间偏好,对于激活街区的活力至关重要。本文选取成都民俗文化浓厚的特色街区东门市井为例,采用观察法、非结构访谈法和行为注记法,对该场地实体空间组成要素和游客行为活动展开实地调研与分析,并为解决民俗文化特色街区外部公共空间与使用者休闲行为需求之间的矛盾提供相应的思路。     

Ar/CHF_3反应离子束刻蚀SiO_2的研究

介绍了Ar/CHF3反应离子束刻蚀和离子束入射角对图形侧壁陡直度及刻蚀选择比的影响。使用紫外曝光技术在SiO2基片上获得光刻胶掩模图形,采用Ar CHF3来刻蚀石英基片,调节二者的流量配比,混合后通入离子源。在Ar和CHF3的流量比为1∶2,总压强为2×10-2Pa,离子束流能量为450 eV,束流为80 mA,加速电压220 V~240 V,离子束入射角15°并旋转样品台的情况下,刻蚀20 min后,得到光栅剖面倾角陡直度为80°~90°。同时发现,添加CHF3后,提高了SiO2的刻蚀速率和刻蚀SiO2与光刻胶的选择比,最高可达7∶1。