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Surface enhanced Raman scattering (SERS) spectroscopy was first utilized to study the photo-orientation behaviour of the photoreactive groups on a novel photo-alignment film surface and elucidate the generation mechanism of pretilt angle. The novel photo-alignment film was prepared by spin-coating a solution of ladderlike polysiloxane (LPS) bearing dual photoreactive group on an ITO surface and by irradiation with linear-polarized ultraviolet (LPUV) light. A Si-H terminal compound (M) containing an identical photosensitive part has been used to fabricate a model film for SERS investigation. 相似文献
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聚苯胺薄膜电极上示差脉冲伏安法可逆波理论研究 总被引:1,自引:1,他引:0
本文提出了聚苯胺(PANI)薄膜电极上示差脉冲伏安法可逆波理论,经验证理论和实验结果相符合. 相似文献
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《Composite Interfaces》2013,20(4):321-334
The plasma polymerization technique was used to surface modify glass fibers in order to form a strong but tough link between the glass fiber and the polyester matrix, and enable an efficient stress transfer from the polymer matrix to the fiber. Plasma polymer films of hexamethyldisiloxane, vinyltriethoxysilane, and tetravinylsilane in a mixture with oxygen gas were engineered as compatible interlayers for the glass fiber/polyester composite. The interlayers of controlled physico-chemical properties were tailored using the deposition conditions with regard to the elemental composition, chemical structure, and Young's modulus in order to improve adhesion bonding at the interlayer/glass and polyester/interlayer interfaces and tune the cross-linking of the plasma polymer. The optimized interlayer enabled a 6.5-fold increase of the short-beam strength compared to the untreated fibers. The short-beam strength of GF/polyester composite with the pp-TVS/O2 interlayer was 32% higher than that with industrial sizing developed for fiber-reinforced composites with a polyester matrix. 相似文献
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Na2O-SiO2-Al2O3-NaCl-H2O体系中,以水玻璃和准一水软铝石为原料,分别在 堇青石和玻璃载体上水热合成方沸石(ANA)和方钠石(SOD)沸石膜。研究水含量 、反应温度、反应时间与多次合成对膜结晶的影响。用XRD,SEM,EDX表征膜的晶 相、形貌和化学组成。堇青石负载方沸石膜在对95%(wt.)乙醇水溶液的渗透蒸发 实验中,水优先透过沸石膜的选择性显示了晶间孔的醇/水分离作用。非计量的 NaCl进入到在玻璃载体上成膜的方钠石笼中,致使该膜显示光致变色效应。 相似文献
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基于固定化染料吸收光谱的原理,本文研究了将染料指示剂固定于阴离子交换膜上而制成的光导纤维pH传感器.实验结果与理论相符.固定化作用引起了染料pKa值的变化,也引起了吸收波长的位移,所提出的六个传感器可用于pH1.6-11.0范围内不同区间的pH测量.对传感器的响应特性及其影响因素也进行了必要的探讨. 相似文献
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化学修饰电极的研究 XIII.聚乙烯二茂铁薄膜电极对抗坏血酸的电催化氧化 总被引:1,自引:0,他引:1
本文表明用旋转涂层法制备的聚乙烯二茂铁(PVFc)薄膜电极在水溶液和乙腈中, 0.3~1.0V(vs.SCE)电位范围内均可呈现二茂铁(Fe)的氧化还原峰. PVFc薄膜电极对水溶液中的抗坏血酸(AH2)在较宽的pH范围和较宽的浓度范围内均有良好的电催化氧化作用,为EC平行催化过程。利用旋转圆盘电极进行了催化过程动力学分析,求出了催化反应动力学参数.PVFc薄膜电极的稳定性和催化稳定性都较好.在AH~2浓度6x10^-^2~6x10^-^6mol/L范围内,催化峰电流与AH~2浓度呈良好的线性关系,有应用于分析AH~2的意义。 相似文献
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新型导电聚合物-聚吡咯溴离子化学传感器 总被引:1,自引:0,他引:1
本文用电化学方法把导电聚合物聚吡咯(PPy)修饰在玻碳(GC)电极上, 研究了Br^-离子的掺杂效应和薄膜电极的电化学行为, 研制一种新型Br^-离子选择电极, 电极的响应机制是基于导电聚合物中阴离子的掺杂效应, 详细研究了聚合条件对电极电位响应性能的影响, 电极具有内阻小、响应快、抗毒化能力强、制备简便等优点, 电极对1x10^-^1-x10^-^4MBr^-呈能斯特响应, 检测下限7x10^-^5M, 斜率61mV/PBr^-。本文结果是化学修饰电极技术在化学传感器方面应用的有意义的尝试, 薄膜的良好导电性质使之更易于制备离子敏感电子学器件和生物电子学器件。 相似文献