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用LB方法在电沉积CdS薄膜上修饰了PcCu单分子膜,并利用表面光电压谱对CdS薄膜与PcCu修饰的CdS薄膜进行了测试。结果表明,修饰后的CdS薄膜其表面光电压值提高约50倍,并且光电压响应由300-500nm扩展为300-700nm。紫外-可见偏振光谱测试表明,LB膜中酞菁环的取向角为45度。 相似文献
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综述了几种用于监控薄膜外延生长的光学原位实时监测方法的进展。其中光反射差法/光反射各向异性谱(RDS/RAS)和p偏振反射谱(PRS),表面光吸收(SPA),椭偏仪(SE)等。在外延过程中已观测到了薄膜层状外延周期振荡。 相似文献
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2DNMR在波谱学的化学应用中占据首要位置。本文简述了COSY,LRCOSY,COSYDEC,SECSY,DQC-COSY,RCT,INADIQUATE,RELAY,INVERSE,NOESY,HOESY,OHAHA,ROESY,HMQC,HMBC等谱的形状,指认步骤及其应用。 相似文献
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利用LB技术,以二十碳酸作辅助成膜材料,在疏水处理的P-Si上分别制备了2、4、6、10和20层聚乙烯咔唑(PVK)超分子膜。对这种体系的表面光电压谱(SPS)研究结果表明,表面光电压随PVK膜层数的增加而增强,在紫外区增强较为明显。随着膜层数的增加,表面光电压有趋于饱和的趋势。膜对基底的敏化主要是由于PVK的光导电性引起的。 相似文献
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碳氢碳氟表面活性剂混合胶束的NMR和ESR研究 总被引:6,自引:0,他引:6
用NMR,ESR和表面张力测量研究了3-十二烷氧基-2-羟丙基磺酸钠(SDEHS)与全氟辛酸钠(SPFO)混合溶液微环境性质,表面张力测定表明长链烷基磺酸盐中嵌入羟丙基后,其表面活性提高,而与SPFO混合溶液的表面活性高于单一的SDEHS和SPFO,NMR和ESR研究表明,SDEHS的碳氢链与SPFO的碳氟链之间有强烈的相互作用,SDEHS与SPFO形成混合胶束,混合胶束“界面”的微观粘度较SDE 相似文献
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开发设计了一种用于加速器设计的数据库管理系统原型,即FISHBASE。该系统采用一与目前较流行的通用数据库管理系统FOXBASE相类似的界面。对于腔内电磁场的计算,则是移植了SUPERFISH的代码。 相似文献
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利用LB技术,以二十碳酸作辅助成膜材料,在疏水处理的p-Si上分别制备了2,4,6,10和20层聚乙烯咔唑超分子膜。对这种体系的表面光电压谱研究结果表明,表面光电压随PVK膜层数的增加而增强,在紫外区增强较为明显。随着膜层数的增加,表面光电压有趋于饱和的趋势。膜对基底的敏化主要是由于PVK的光导电性引起的。 相似文献
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L.Huang N.Ding G.D.Jian Southwestern Institute of Physics P.O.Box Chengdu China 《核聚变与等离子体物理》1996,(4)
TOROIDALSHEARFLOWDRIVIENINSTABILITYL.HuangN.DingG.D.JianSouthwesternInstituteofPhysics,P.O.Box432,Chengdu610041,ChinaABSTRACT... 相似文献
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阐述了利用细菌视紫红质薄膜(BR薄膜)优良的非线性光学特性作为光寻址的空间光调制器的实验研究.BR有两个重要的光敏中间态(B态和M态),其吸收带(B态吸收峰为570nm,M态吸收峰为412nm)重叠区域较少,利用其正向(B→M)和逆向(M→B)光反应之间转化关系和B态与M态的差异吸收实现了相干光学图像到非相干光学图像的转换实验.采用经基因改性的细菌视紫红质薄膜(BRD96N)材料,使用670nm相干光作为写入光,530nm非相干光作为读出光,得到了分辨率约为200 lines/mm,对比度约为2.1∶1的
关键词:
光寻址空间光调制器
细菌视紫红质薄膜(BR薄膜)
非线性光学特性
相干光与非相干光图像相互转换 相似文献
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菌紫质光致变色吸收特性的二能级理论研究 总被引:3,自引:2,他引:1
采用二能级模型(B态和M态)简化菌紫质(bR)光循环过程,建立了菌紫质光致变色吸收特性的数学方程,数值计算了bR膜对570nm单光束和对570nm与412nm双光束的吸收特性.计算表明,bR膜的光吸收特性与入射光波长、入射光强、摩尔消光系数、光密度和M态寿命有很大的关系.bR膜用于光存储时,读出光强和M态寿命是影响bR读出使用时间的两个重要因素.570nm与412nm双光束作用于bR膜时,可以实现以光控光操作,但由于570nm黄光的透过动态范围要比412nm紫光的透过动态范围大得多,因而在实际应用中应以黄光作为信息光,紫光作为控制光.基于bR膜对黄、紫光束的吸收特性,可以将其应用于亮背景滤除、反象器、图象相减、光寻址空间光调制器等光信息处理领域. 相似文献
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J. B. Chu S. M. Huang D. W. Zhang Z. Q. Bian X. D. Li Z. Sun X. J. Yin 《Applied Physics A: Materials Science & Processing》2009,95(3):849-855
This paper presents further insights and observations of the chemical bath deposition (CBD) of ZnS thin films using an aqueous
medium involving Zn-salt, ammonium sulfate, aqueous ammonia, and thioure. Results on physical and chemical properties of the
grown layers as a function of ammonia concentration are reported. Physical and chemical properties were analyzed using scanning
electron microscopy (SEM), X-ray energy dispersive (EDX), and X-ray diffraction (XRD). Rapid growth of nanostructured ZnO
films on fluorine-doped SnO2 (FTO) glass substrates was developed. ZnO films crystallized in a wurtzite hexagonal structure and with a very small quantity
of Zn(OH)2 and ZnS phases were obtained for the ammonia concentration ranging from 0.75 to 2.0 M. Flower-like and columnar nanostrucured
ZnO films were deposited in two ammonia concentration ranges, respectively: one between 0.75 and 1.0 M and the other between
1.4 and 2.0 M. ZnS films were formed with a high ammonia concentration of 3.0 M. The formation mechanisms of ZnO, Zn(OH)2, and ZnS phases were discussed in the CBD process. The developed technique can be used to directly and rapidly grow nanostructured
ZnO film photoanodes. Annealed ZnO nanoflower and columnar nanoparticle films on FTO substrates were used as electrodes to
fabricate the dye sensitized solar cells (DSSCs). The DSSC based on ZnO-nanoflower film showed an energy conversion efficiency
of 0.84%, which is higher compared to that (0.45%) of the cell being constructed using a photoanode of columnar nanoparticle
ZnO film. The results have demonstrated the potential applications of CBD nanostructured ZnO films for photovoltaic cells. 相似文献
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本文用表面共振增强Raman方法,研究了菌紫质在不同条件下吸附在镀银玻璃上的Raman光谱,结果表明菌紫质吸附在银膜上,代表菌紫质分子循环中间体M412特征谱带的1565cm-1Raman位移明显增强,说明银膜对M412态有一定表面共振增强作用。 相似文献
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《Physics letters. A》2020,384(32):126831
In this Letter, we report the polarization-enhanced bulk photovoltaic effect (BPV) in pristine BiFeO3 (BFO) epitaxial film under standard 1 sun AM 1.5 G illumination. High-quality epitaxial BFO films are grown on (001)-oriented niobium doped-SrTiO3 substrates by pulsed laser deposition. The best BFO film based photovoltaic device achieves a power conversion efficiency of 0.0062% under standard illumination. Besides, it is found that the number of bipolar pulses plays a key role in improving the short-circuit current density and open-circuit voltage. These results are beneficial for further understanding of physical origin of the photovoltaic properties in ferroelectric oxides. 相似文献
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A. V. Maksimov T. A. Valkova O. G. Maksimova 《Bulletin of the Russian Academy of Sciences: Physics》2013,77(8):1064-1067
A model for describing the self-organization of chains with intra- and intermolecular interactions of the dipolar type and the birefringence (BR) effect in surface nanolayers of polymer films obtained by evaporation of a solvent is developed. Calculations of the planar orientation order parameter versus the Kuhn segment length and BR coefficient versus the film thickness are in good agreement with experimental data on investigating ordering with an inclined polarized beam for various polymer homologs. 相似文献