基体温度和氩气压强对射频磁控溅射制备GZO薄膜性能的影响

采用射频磁控溅射方法,用Ga2O3含量为1%的ZnO做靶材,在不同基体温度和不同溅射压强的条件下制备了高质量的GZO透明导电薄膜.结果表明:基体温度和氩气压强对GZO薄膜的晶体结构、光电性能有较大影响.当温度为500℃,溅射气压为0.2Pa时制备的GZO薄膜光电性能较优,方块电阻为7.8Ω/□,电阻率为8.58×10-4Ω.cm,可见光的平均透过率为89.1%.     

Film Morphology, Emulsification of Dodecyl/Carboxyl Modified Polysiloxane and Its Application Performance on Cotton Fabrics

The film morphology of dodecyl/carboxyl modified polysiioxane (RCAS) on cotton fabric or the silicon wafer was investigated and characterized by field emission scanning electron microscopy ( FESEM ),atomic force microscope ( AFM ),and Fourier transform infrared spectrometer (FTIR).Experimental results indicate that RCAS is a good film forming material on different substrates.Relatively smooth film was formed on cotton fabric surface,on which the grooves disappeared.In addition,RCAS formed a micromorphology inhomogeneous and unsmooth film on the silicon wafer.Many high or low bright peaks distributed randomly on the film surface,especially as the field was 2μm ×2 μmand the date scale was 5 nm in AFM observation.Then RCAS was emulsified with nonionic surfactant alkyl polyoxyethylene ether in order to achieve a transparent organosilicon emulsion-RCAS emulsion ( RCSE),which possessed good stability.The properties of RCSE and its application performance on cotton fabrics were investigated and characterized by transmission electron microscope (TEM),particle size analysis,and voltage test instrument.The results show that the average particle size of RCAS emulsion is 28.32 nm,while the ζ voltage is - 37.88 mV.Compared with untreatd cotton fabric,the.softness of treated fabric can be improved with RCSE to a certain extent.At the.same time,the fabric treated with RCSE acquires unique fluffy and soft handle.     

水立方薄膜(ETFE膜)导热系数的测定

大学生创新实验项目是我国高等教育培养当代大学生创新能力的一项重要举措,它旨在培养大学生的创新意识和动手能力。上海工程技术大学对申请到的大学生创新实验项目"水立方薄膜(ETFE膜)热传导特性的研究"做了深入探讨,利用稳态法测得了ETFE膜的导热系数,发现其值小于0.23W/m.℃,可以作为理想的绝热材料应用在建筑等领域,有效地节省电能,符合当前的绿色经济的要求。     

In-situ secondary growth of nanocube-based Prussian-blue film as an ultrasensitive biosensor

A regular nanostructure has been widely confirmed to result ina marked improvement in material performance in biosensing applications.In the present study,a regular nanostructured Prussian blue(PB) film with two heterogeneous crystal layers was synthesized in-situ using a secondary growth method.A PB seed layer was first controlled to form uniform cube-like crystal nuclei through an ultrasonic reaction with a single reactant.Then,well-defined 100 nm PB nanocubes were further crystallized on this seed layer using a self-assembly approach.In order to accelerate the electron transfer rate during the enzyme reaction for glucose detection,the graphene was used as the main cross-linker to immobilize glucose oxidase on the PB film.The as-prepared biosensor exhibited high electrocatalysis and electron conductivity for the detection of trace glucose with a sensitivity of141.5 μA mM~(-1) cm~(-2),as well as excellent anti-interference ability in the presence of ascorbic acid and uric acid under a low operation potential of-0.05 V.     

基于复合封装薄膜的水汽透过率测试系统研究

基于活泼金属(钙、镁)电学法设计研发了用于老化测试环境下的水汽透过率测试仪器,测试精度达到10-6 g·m~(-2)·d~(-1).利用本测试仪器测试了不同叠层次数的Al_2O_3/ZrO_2复合薄膜的水汽透过率,结果表明,多次叠层后的Al_2O_3/ZrO_2复合薄膜的水汽阻隔性能得到了较好提升.     

ZnO/WO_3纳米片薄膜的光电催化性能研究

采用水热法在不锈钢基底上制备WO3纳米片阵列,然后将其浸渍于不同浓度Zn(NO_3)_2溶液中以负载ZnO纳米颗粒,从而制备出ZnO/WO_3纳米片薄膜。采用场发射扫描电镜(FESEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)、紫外-可见吸收光谱(UV-Vis)和电化学阻抗图谱(EIS)等方法对ZnO/WO_3复合薄膜的形貌、结构、物相组成和光电性能等进行分析,重点考察了薄膜电极对亚甲基蓝(MB)的光电催化降解性能。结果表明,WO_3纳米片均匀垂直于基底生长,Zn元素以ZnO颗粒的形式分布在WO_3表面;ZnO的引入促进了WO_3中产生的光生电子-空穴对的分离,从而使ZnO/WO_3复合薄膜表现出比纯WO_3薄膜更优异的光电性能和光电催化活性;在Zn(NO_3)_2浸渍液浓度为20mmol/L时,所制ZnO/WO_3复合薄膜具有最佳的光电催化性能,在MB溶液初始浓度为10mg/L、外加偏压为0.8V、光照1h的条件下,采用该样品对MB的降解率达96.5%,并且复合薄膜具有良好的循环稳定性,在重复使用5次后,对MB的光电催化降解效率没有明显降低,有望在实际污水处理中得到应用。     

雨天公路水膜厚度模型验证及行车安全性分析

针对雨天行车道路表面产生水膜,易使车辆打滑发生交通事故的问题,采用人工模拟降雨试验,获得了水泥混凝土路表水膜厚度回归方程,验证了国内外现有水膜厚度计算模型。结果表明：路表水膜厚度随降雨强度和排水长度的增大而增大,随路面坡度的增大而减小;相同条件下,水泥混凝土路表水膜厚度值高于沥青路面水膜厚度值,其原因主要是水泥混凝土的亲水性导致路表水分子流动阻力增大,水分子积聚增多,使水膜厚度增大。对西安地区不同暴雨重现期下高速公路水膜厚度值进行计算,结果表明在五年重现期暴雨强度1.954 mm?min-1下,路表水膜厚度值不超过滑水速度发生时的临界水膜厚度值2.35mm,设计时速80 km.h-1可保证雨天行车安全。     

多孔SiO_2减反射薄膜的制备研究及光伏应用

采用溶胶凝胶法,使用氨水催化正硅酸乙酯在乙醇溶剂中水解制备SiO_2溶胶,研究反应物浓度、退火温度及匀胶速率对多孔SiO_2减反射薄膜的光学性质的影响.结果表明,SiO_2溶胶颗粒尺寸随着乙醇用量的增加而减小,匀胶速率可以对薄膜厚度进行调整及制备出不同折射率的薄膜.乙醇用量为120 m L和转速为2000 r/min时,制备出的SiO_2薄膜具有最佳减反射性能.不同退火温度下,SiO_2溶胶颗粒尺寸、薄膜的光学性质均无明显改变.采用优化后的工艺制备出的多孔SiO_2减反射薄膜应用于Cd Te薄膜太阳电池上,在400 nm-800 nm波段,量子效率得到提高,积分短路电流密度提高了4.83%,光电转化效率由14.92%提高到15.45%.     

聚酰亚胺/SiO2-Al2O3杂化薄膜亚胺化反应分析及分子结构预测

本文采用溶胶-凝胶法制备聚酰亚胺/二氧化硅-氧化铝（PI/SiO2-Al2O3）杂化薄膜。运用红外光谱仪、示差扫描量热仪和紫外-可见分光光度计分别测试了亚胺化过程中各阶段杂化膜的特征基团吸收峰的变化,反应热以及紫外-可见光透过率。使用原子力显微镜分析了无机相在亚胺化各阶段的形貌变化。通过这些分析推测了杂化薄膜的分子结构。     

电沉积和硒化制备CuInSe2薄膜

以石墨为阳极、钛片为阴极,采用恒电流法制备Cu-In预制膜,然后硒化处理得到CuInSe2薄膜.分析了预制膜和CuInSe2薄膜的相组成及其影响因素.结果表明:采用不同的电沉积工艺,可以得到不同相组成的Cu-In预制膜.在保证Cu/In小于1的条件下,降低InCl3浓度和H3Cit/CuCl2浓度比,选择较高电流,可以获得具有CuIn相和Cu2In相的Cu-In预制膜.含有CuIn相和Cu2In相的Cu-In预制膜,经硒化得到的CuInSe2薄膜具有单一CuInSe2相组成,并且符合化学剂量比要求;而只含有CuIn相的预制膜硒化后除了有CuInSe2相外还出现了CuSe相.