Hybrid ZnO NR/graphene structures as advanced optoelectronic devices with high transmittance

A hybrid structure (HS) made of one-dimensional ZnO nanorods (NRs) and a two-dimensional synthesized graphene sheet was successfully constructed in this study. The uniform ZnO NRs were obtained by hydrothermal method and grown on a graphene surface that had been transferred to a polyethylene terephthalate substrate. The HS exhibited high transmittance (approximately 75%) over the visible wavelength range, even after cyclic bending with a small radius of curvature. Raman spectroscopy and Hall measurement were carried out to verify the chemical composition and electrical properties of the structure. Stable electrical conductance of the ZnO NR/graphene HS was achieved, and increase in carrier mobility decreased the resistance of the ZnO-with-graphene sheet in comparison with bare ZnO NRs.     

高透光细瓷的制备

实验以锂瓷石、石英、龙岩高岭土、钾长石、烧滑石为主要原料制备坯体,通过采用外加腐殖酸钠和膨润土来调节高透光细瓷坯体的成形性能;并通过单因素和正交实验考察了配方组成对高透光细瓷性能的影响。当配方（质量％）为：锂瓷石40、石英27、龙岩高岭土32、钾长石8、烧滑石1．5、膨润土2、熔块2、腐殖酸钠0．8、氧化铝2,在还原气氛1320℃烧成,制备了高透光细瓷。该细瓷透光度可达27．5。     

THz激光F-P片旋转透过率研究

在不同角度下测量THz激光透过率对于材料性质研究及THz参数测量具有重要意义。本文在实验上研究了旋转F-P片的THz激光透过率,分别在不同角度下测量了硅片和锗片的THz激光透过率,测量角度范围0.175-2.967 rad,旋转步长0.175rad,得到的THz激光透过率具有一定的周期性,实验验证了旋转F-P片测量THz激光透过率在测量THz激光波长等应用的可行性。     

Sputtering deposition of amorphous cadmium stannate as transparent conducting oxide

In this work we studied deposition conditions by RF sputtering of ternary oxides of Cd and Sn, starting from Cd₂SnO₄ target and varying substrate temperature, sputtering power and deposition gas (from inert Ar to oxidizing 50% Ar-50% O₂ atmosphere). The aim of this study was to obtain thin films for use as Transparent Conducting Oxide (TCO). TCOs are oxides that couples low sheet resistance and high transparency that find application in many fields like solar cells, light emitting diodes and transparent thin film transistors.Thin films functional properties were characterised by means of sheet resistance and transmittance measurements in the visible region, and film composition and structure were investigated by total reflection X ray fluorescence and glancing incidence X ray diffraction. Morphology was studied by Atomic Force Microscopy and Scanning Electron Microscope and showed very smooth surface suitable for solar cells application. Composition and phase analysis allowed us to discuss possible correlation of film structure with functional properties. Deposition in inert atmosphere at 400 °C substrate temperature was selected for its low sheet resistance and high transparency that are comparable to the ones of commercial TCOs like indium tin oxide or SnO₂: F. The thin film obtained in these conditions was amorphous, and it crystallized into CdSnO₃ ilmenite phase when annealed at 700 °C; segregation of Sn₃O₄ was also observed. Since sheet resistance of thin films increases after annealing treatments, amorphous thin film was selected for future applications.     

傅立叶变换红外光谱仪在水中油定量分析中的应用

采用红外光谱法对污水中油含量进行测试,并对傅立叶变换红外光谱仪的应用机理和实际工作中遇到的问题进行了研究分析。通过实验确定了用PE-2000傅立叶变换红外光谱仪测定水中油的最佳实验条件。该方法分析准确度较高,回收率在97%～103%之间。     

Effect of process parameters on the growth and properties of impurity-doped zinc oxide transparent conducting thin films by RF magnetron sputtering

Zinc oxide transparent conducting thin films co-doped with aluminum and ruthenium were grown on polyethylene terephthalate substrates at room temperature using RF magnetron sputtering. The crystal growth and physical properties of the films were investigated with respect to the variation of discharge power density from 1.5 to 6.1 W/cm² and sputtering pressure from 0.13 to 2.0 Pa. X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) showed that the films grown with 3.6 W/cm² power density and sputtering pressure of 0.4 Pa had the best crystallinity and larger pyramid-like grains. The optimized electrical resistivity had a lowest measured value of about 9 × 10⁻⁴ Ω cm. The low carrier mobilities of the films (3-8.9 cm² V⁻¹ s⁻¹) have been discussed in terms of what is believed to be the dominant effect of ionized impurity scattering, but in addition chemisorption of oxygen on the film surface and effect of grain boundaries are also thought to be significant. The transmittances of the films in the visible range are greater than 80%, while the optical band gaps are in the order of 3.337-3.382 eV.     

光学透射元件双面减反射膜的非对称性及其分析

分析了由于光学透射元件双面减反射膜不对称所引起的光学性能变化，以双面镀膜的平均玻璃模型为例，对ＭｇＦ２薄膜进行了计算和分析，得到了不同工作条件，不同要求下的双面膜厚度的许可误差容限。     

PS/PMMA复合光散射性能的研究

雾度和透光率是表征光散射材料性能的两个重要指标。对以PS作为光散射体，以PMMA为基体的复合光散射材料进行实验研究。实验结果表明：少量PS添加到PMMA中时即可以制备出光散射材料，PS添加量为1%时，复合光散射材料的透光率为80%；不添加PMMAPS时雾度为50%，添加了PMMAPS时雾度达到80%，PMMAPS可以改善PMMA和PS之间的相容性，提高样品的雾度值。因此通过调节散射剂PS和PMMAPS添加量可实现光散射高雾度和高透光率的双高要求。     

基于暗原色先验与反图像的图像去雾算法

讨论了暗原色先验去雾算法的原理,指出其有去雾时在天空等明亮区域色彩失真的缺陷。针对这个缺陷提出了改进方法,该方法通过估算反图像的透射率修正透射率图以避免色彩失真。该算法可弥补传统算法在明亮区域透射率估算值较低导致色彩失真的不足。实验结果表明该算法有效。     

聚合物在赤磷基抗红外发烟剂中的研究

在实验室条件下利用多波段红外辐射仪，对含不同聚合物的赤磷基发烟剂燃烧产生的烟雾对远红外辐射的透过率进行测试。试验表明：不同聚合物在发烟剂中所起作用不同，相似成分的发烟剂中加入氟可降低烟雾在远红外波段的透过率。井分析了上述烟雾在红外波段产生不同遮蔽效果的原因。