K0.1Sr0.9Co0.8Fe0.2O3-δ透氧膜材料的合成及透氧性能研究

通过溶胶-凝胶法制备了一种新型钾离子掺杂钙钛矿透氧膜材料K_(0.1)Sr_(0.9)Co_(0.8)Fe_(0.2)O_(3-δ)(KSCF),并系统考察了该透氧膜材料的透氧量、稳定性和速率控制步骤等.XRD表征显示,钾离子在钙钛矿A位掺杂量低于或等于10%不会改变KSCF立方钙钛矿结构.SEM分析显示,KSCF膜片在1 220℃焙烧可高度致密,并且KSCF长期放置仍然保持了高机械强度,不会出现类似SrCo_(0.8)Fe_(0.2)O_(3-δ)(SCF)材料的粉化解体.氧渗透实验结果表明,操作温度的升高、膜片厚度的降低以及吹扫气流速的增加均有利于膜片透氧量的提升,厚度为0.5 mm的KSCF膜片在950℃时的透氧量可达2.65 mL/(cm~2·min).对比实验表明,基于同样测试条件KSCF透氧膜的透氧量比SCF材料的透氧量更高.通过对KSCF膜片的速率控制步骤考察可以发现,当KSCF透氧膜膜片厚度低于0.7 mm时,其透氧过程为表面交换控制,当膜片厚度高于0.7 mm时,其透氧过程则会转化为体相扩散控制.     

光致变色二芳烯材料的光子型光信息存储

本文合成了八种光致变色二芳烯化合物,研究了它们的光致变色性质,并综述了它们在光子型光信息存储技术中的应用.在光辐照下,这些化合物在溶液和PMMA膜中均具有良好的光致变色特性.使用这些化合物作为光存储介质,成功进行了系列高密度光子型光信息存储实验,包括全息光存储、双光子光存储和多波长光存储.结果表明:二芳烯材料是光子型全息、双光子和多波长光存储技术中可采用的最理想的存储介质之一.     

SDC-BCCF双相透氧膜材料的合成及透氧性能研究

为了提高透氧膜材料的稳定性和透氧量,通过一锅法合成了Ce_(0.8)Sm_(0.2)O_(1.9)(50%,质量分数,下同)-BaCe_(0.1)Co_(0.3)Fe_(0.6)O_(3-δ)(50%)(SDC-BCCF)萤石-钙钛矿双相透氧膜材料,并系统考察了透氧温度、膜片厚度和氧分压梯度(吹扫气速率)对SDC-BCCF双相透氧膜透氧性能的影响.XRD表征表明,SDC萤石相和BCCF钙钛矿相可均匀相容于SDC-BCCF双相材料中,但是细微分析发现,材料中仍有微量BaCeO_3钙钛矿杂相的存在.SEM表征表明,在1 450℃焙烧条件下可以获得致密的SDC-BCCF双相透氧膜膜片.氧渗透实验表明,温度的升高、膜片厚度的下降以及吹扫气流速率的增加均有利于SDC-BCCF透氧膜透氧量的提升,其中0.5mm厚度的SDC-BCCF双相透氧膜片在950℃下透氧量可达到0.71mL/(min·cm2).通过对SDC-BCCF膜片速率控制步骤的考察可以发现,当SDC-BCCF膜片厚度大于或等于0.7mm时,透氧过程为体相扩散控制;当膜片厚度小于0.7mm时,透氧过程逐步转为表面交换控制.     

基于超分子结构的光电子材料的制备与表征(英文)

为实现短波长光存储材料,提出一种基于金属纳米粒子与染料共掺杂的复合材料制备新方法.采用透射电子显微镜(TEM)、紫外-可见吸收光谱(UV-Vis)以及傅立叶变换红外光谱(FT-IR)对所制备的复合薄膜进行表征.实验发现,与未掺杂银的薄膜相比,掺杂银的复合薄膜中甲基橙的吸收蓝移了6nm.提出并利用超分子结构模型分析了该吸收蓝移的机理.研究结果显示,本研究所提出的这种新的材料制备方法具有制备吸收波长在400～500nm,且可望与GaN激光器在光存储技术中匹配的能力.     

影响光存储介质信息存储质量的因素暨提高光存储介质信息存储质量的方法

本文从盘片质量、刻录设备、使用和保管方法等几个方面对影响常用光存储介质（CD、DVD）信息存储质量的因素进行阐述;通过针对性研究、实验,初步形成提高光存储介质信息存储质量的有效方法和光存储介质的保管方法。     

茚满二酮希夫碱配合物的合成及其在光存储染料中的应用

通过对比有机光存储材料和无机光存储材料,介绍了有机光存储材料在光盘应用中的优势。合成了一种以茚满二酮希夫碱为配体的Ni配合物有机光存储材料,通过紫外波谱分析和热重分析测试希夫碱配体以及希夫碱配合物的光性能和热性能,并且测量了该材料涂覆光盘后的光信号参数,研究了这种茚满二酮希夫碱配合物在蓝光光盘存储中的应用前景。     

用于蓝光可录存储的无机材料研究进展

蓝光存储是信息存储领域发展的一个重要方向.用于蓝光存储的可录型光盘,由于其巨大的商业价值,将是今后研究的热点.本文总结了近几年来国内外文献报道的适用于蓝光可录存储的无机材料的最新研究成果,详细阐述了用于蓝光可录存储的无机薄膜的制备方法、无机记录材料的种类及存储原理.最后,对用于蓝光可录存储的无机材料今后的发展前景进行了展望.     

国产3YC20弹性合金膜片膜盒实验与研究

本文从设计计算,制造与应用3方面,就国产3YC20弹性合金(系机电部重庆仪表材料研究所产品牌号,相当于00Cr17Ni13M03)制造替代进口的316L材料的波纹膜片膜盒,进行了实验研究。提出了应用3YC20弹性合金制造波纹膜片膜盒时,材料应控制的初始冷变形范围和相应的制造工艺方法。运用的波纹膜片计算方法,计算的波纹膜片特性与实验结果能很好的符合。     

Mn~(2+)掺杂的ZnO-B_2O_3-SiO_2光存储玻璃的热释光研究

采用高温熔融法制备了Mn2+掺杂的ZnO-B2O3-SiO2(ZBSM)体系的光存储玻璃,并通过热释光谱研究了ZBSM玻璃的存储性能以及陷阱能级的分布情况,结果显示:材料内部至少存在中心能级的深度分别约为0.80eV和1.02eV的两种陷阱,而激活离子Mn2+和基质组成ZnO-B2O3-SiO2的变化均会造成材料光存储性能及陷阱分布的改变。     

超高密度光存储技术的现状和今后的发展

文章综述了光存储领域的研究进展 ,主要包括体全息存储、近场光学存储和双光子双稳态存储技术 .在介绍各种存储技术发展现状的同时 ,分析了各自的优势和存在的问题 .从整个光存储学科发展的角度给出了未来的趋势 .     

Photochromic diarylethene for two-photon 3D optical storage

We had accomplished recording and readout of bit patterns by two-photon 3D optical storage technology using a new photochromic diarylethene, 1,2-bis(2-methyl-5-methylene-n-butylamido-thien-3-yl) perfluorocyclopentene (BMMBTP), as memory medium. The photochromic reaction, both in solution and in poly(methyl methacrylate) (PMMA) amorphous film, and fluorescence property of BMMBTP were investigated.     

Electrochromic thin films from a redox active diarylethene by electrochemical polymerization

A diarylethene substituted with 3,4-(propane-1,3-diyldioxy)thiophene (ProDOT) was synthesized to induce electrochemical deposition of diarylethenes. The ProDOT substituted diarylethene (BTFPP) showed reversible photochromism from colorless to purple upon exposure to a UV light and bleached to colorless by a visibly light. The oxidation potential of the new ProDOT substituted diarylethene was lower than that of the unsubstituted diarylethenes due to the electroactive ProDOT unit. Under an electrochemical condition, the solution of BTFPP gave soluble polymers but deposited insoluble film on a working electrode coated with a PEDOT layer. This result indicates that the PEDOT nano layer (68 nm thick) function as a seeding layer to induce polymerization and electrodeposition of BTFPP. Furthermore electro-copolymerization using a mixture of BTFPP and EDOT afforded electrodeposition of the copolymers on the PEDOT seeding layer. An electrochromic electrode was successfully fabricated by depositing the photochromic BTFPP on an ITO glass, which shows a reversible electrochromic change from violet to sky blue.     

Photochromic diarylethene for polarization holographic optical recording

Photochromic diarylethene, 1,2-bis[2-methyl-5-(3-fluorophenyl)-3-thienyl] perfluorocylcopentene (1a), was synthesized. The compound showed good photochromic reactions both in solution and in PMMA matrix by photo-irradiation. Using the diarylethene 1b/PMMA film as recording medium and a He-Ne laser for recording and readout, four types of polarization holographic optical recording were accomplished for the first time. The results show that the orthogonal circular polarization recording is the best method for holographic optical recording when the target photochromic diarylethene is used as recording material.     

多孔硅与聚甲基丙烯酸甲酯复合光致发光特性研究

多孔硅与有机材料复合可以改善多孔硅的光致发光特性。用化学腐蚀的方法制备了多孔硅，通过不同方法实现了多孔硅与聚甲基丙烯酸甲酯(PMMA)的复合。实验结果表明，用旋涂法实现的PMMA固化后再与多孔硅复合而制得的样品的结果最好，它与原始的多孔硅样品相比，发光峰发生了蓝移而且发光强度下降很小。PMMA层有限的厚度和PMMA对多孔硅表面的保护使复合后发光强度下降很小。制备的多孔／PMMA复合体系的发光强度几乎不随时间而下降，这可能是由于PMMA有效地隔绝多孔硅与空气的接触，保护了多孔硅的表面，不会产生更多的悬挂键。     

The effect of temperature on the nanoscale adhesion and friction behaviors of thermoplastic polymer films

Adhesion and friction tests were carried out in order to investigate the effect of temperature on the tribological characteristics of poly(methylmethacrylate) (PMMA) film using AFM. The pull-off and friction forces on the PMMA film were measured under a high vacuum condition (below 1 × 10(-4)?Pa) as the temperature of the PMMA film was increased from 300 to 420?K (heating) and decreased to 300?K (cooling). Friction tests were also conducted in both high vacuum and air conditions at room temperature. When the temperature was 420?K, which is 25?K higher than the glass-transition temperature (T(g)) of PMMA, the PMMA film surface became deformable. Subsequently, the pull-off force increased in proportion to the maximum applied load during the pull-off force measurement. In contrast, when the temperature was under 395?K, the pull-off force did not depend on the maximum applied load. The friction force began to increase when the temperature rose above 370?K, which is 25?K lower than the T(g) of PMMA, and rapidly increased at 420?K. Decrease of the PMMA film stiffness and plastic deformation of the PMMA film were observed at 420?K in force-displacement curves. After the heating to 420?K, the coefficient of friction was measured under air condition at room temperature and was found to be lower than that measured before the heating. Additionally, the RMS roughness increased as a result of heating.     

Printable and flexible macroporous organosilica film with high protein adsorption capacity

An approach for creating a flexible and macroporous silsesquioxane film using phase separation method is described. The porous film was prepared by a simple coating method where sol-gel solution containing polyacrylic acid (PAA) and 1,6-bis(trimethoxysilyl)hexane in water was applied on boehmite silica coated polymethylmethacrylate (PMMA) film. After drying, the water soluble PAA template was removed by washing the film with water revealing the porous film. With certain ratios of PAA and water, fully co-continuous pore system with open surface was obtained. Porous films with 3-4 μm thickness were found to be highly flexible. The biocompatibility of the porous film was tested by immobilizing a high affinity biotin-binding chimeric avidin (ChiAVD(I117Y)) into the porous matrix The porous film was found to adsorb higher amounts of functional chimeric avidin compared to the pure PMMA film or a boehmite silica coated PMMA film.     

非线性光学聚合物薄膜DCDHF-2-V/PMMA的特性

将新型有机非线性光学分子DCDHF-2-V按一定比例掺入聚甲基丙烯酸甲酯(PMMA)中,采用旋涂方法制备聚合物薄膜。为了得到宏观二阶非线性光学特性,在90℃对薄膜进行电晕极化,形成各向异性。对极化前后的薄膜进行紫外/可见光吸收频谱分析和原子力显微镜分析。采用RHF方法在6-31G基组上对DCDHF-2-V/PMMA薄膜体系中的DCDHF-2-V分子和PMMA进行闭壳层Hartree-Fock理论计算,得到它们的一阶超极化率β分别为60.278755×10-30esu和10.902267×10-34esu。     

聚甲基丙烯酸甲酯掺杂剂对7,7,8,8-四氰基苯醌二甲烷薄膜特性的影响

采用旋涂法制备了7,7,8,8-四氰基苯醌二甲烷(TCNQ)及聚甲基丙烯酸甲酯(PMMA)掺杂后的TCNQ敏感薄膜,探讨了PMMA掺杂剂及不同转速对薄膜性能的影响.结果表明,TCNQ/PMMA复合薄膜中TCNQ颗粒变得更细小和均匀,但对NH3的响应不稳定;纯TCNQ薄膜对NH3具有相当高的灵敏度,但响应和恢复时间较长.     

Replication of surfaces of natural leaves for enhanced micro-scale tribological property

In this paper, we report on the replication of surfaces of Lotus and Colocasia leaves onto thin polymeric films using a capillarity-directed soft lithographic technique. The replication was carried out on poly(methyl methacrylate) (PMMA) film spin coated on silicon wafer using poly(dimethyl siloxane) (PDMS) molds. The friction properties of the replicated surfaces were investigated at micro-scale in comparison with those of PMMA thin film and uncoated silicon wafer. The coefficients of friction of the replicated surfaces were almost five times lower than those of the PMMA thin film and four times lower than those of the uncoated silicon wafer. The superior micro-tribological properties of the replicated surfaces could be attributed to the reduced real area of contact projected by the surfaces.