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Optimization of TiO_2/Cu/TiO_2 multilayers as a transparent composite electrode deposited by electron-beam evaporation at room temperature

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Chinese Physics B 2015年第4期24卷 445-450页

作者：孙洪涛王小平寇志起王丽军王金烨孙义清 College of Science University of Shanghai for Science and Technology

Highly transparent indium-free composite electrodes of TiO2/Cu/TiO2 are deposited by electron-beam evaporation at room temperature. The effects of Cu thickness and annealing temperature on the electrical and optical properties of the multilayer film are investigated. The critical thickness of Cu mid-layer to form a continuous conducting layer is found to be 11 nm. The multilayer with a mid-Cu thickness of 11 nm is optimized to obtain a resistivity of 7.4× 10^- 5 Ω-cm and an average optical transmittance of 86% in the visible spectral range. The figure of merit of the TiO2/Cu（ 11 nm）/TiO2 multilayer annealed at 150℃ reaches a minimum resistivity of 5.9× 10^- 5 ℃.cm and an average optical transmittance of 88% in the visible spectral range. The experimental results indicate that TiO2/Cu/TiO2 multilayers can be used as a transparent electrode for solar cell and other display applications.

关键词： multilayer transparent conductor thin film annealing

Dependence of charge trapping of fluorescent and phosphorescent dopants in organic light-emitting diodes on the dye species and current density

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Chinese Physics B 2010年第3期19卷 450-455页

作者：魏斌廖英杰刘纪忠路林曹进王军张建华 key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University

This paper utilizes multilayer organic light-emitting diodes with a thin layer of dye molecules to study the mech- anism of charge trapping under different electric regimes. It demonstrates that the carrier trapping was independent of the current density in devices using fluorescent material as the emitting molecule while this process was exactly opposite when phosphorescent material was used. The triplet-triplet annihilation and dissociation of excitons into free charge carriers was considered to contribute to the decrease in phosphorescent emission under high electric fields. Moreover, the fluorescent dye molecule with a lower energy gap and ionized potential than the host emitter was observed to facilitate the carrier trapping mechanism, and it would produce photon emission.

关键词： organic light-emitting diodes excitation mechanism charge trapping current density

Submesoscale characteristics and transcription of a fatty acid elongase gene from a freshwater green microalgae, Myrmecia incisa Reisigl

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Chinese Journal of Oceanology and Limnology 2011年第1期29卷 87-95页

作者：于水燕刘士成李春阳周志刚 key Laboratory of Genetic Resources and Ecology in Aquaculture and Aquaculture E-Institute of Shanghai Municipal Education CommissionShanghai Ocean University

Myrmecia incisa is a green coccoid freshwater microalgae, which is rich in arachidonic acid （ArA, C20： 4ω-6, △5, 8, 11, 14）, a long chain polyunsaturated fatty acid （PUFA）, especially under nitrogen starvation stress. A cDNA library of M. incisa was constructed with λ. phage vectors and a 545 nt expressed sequence tag （EST） was screened from this library as a putative elongase gene due to its 56% and 49% identity to Marchantia polymorpha L. and Ostreococcus tauri Courties et Chretiennot-Dinet, respectively. Based upon this EST sequence, an elongase gene designated MiFAE was isolated from M. incisa via 5＇/3＇ rapid amplification of cDNA ends （RACE）. The cDNA sequence was 1 331 bp long and included a 33 bp 5＇-untranslated region （UTR） and a 431 bp 3＇-UTR with a typical poly-A tail. The 867 bp ORF encoded a predicted protein of 288 amino acids. This protein was characterized by a conserved histidine-rich box and a MYxYY motif that was present in other members of the elongase family. The genomic DNA sequence of MiFAE was found to be interrupted by three introns with splicing sites of Introns I （81 bp）, II （81 bp）, and III （67 bp） that conformed to the GT-AG rule. Quantitative real-time PCR showed that the transcription level of MiFAE in this microalga under nitrogen starvation was higher than that under normal condition. Prior to the ArA content accumulation, the transcription of MiFAE was enhanced, suggesting that it was possibly responsible for the ArA accumulation in this microalga cultured under nitrogen starvation conditions.

关键词： Myrmecia incisa fatty acid elongase transcription nitrogen starvation arachidonic acid (ArA)

Optical humidity-sensitive mechanism based on refractive index variation

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Chinese Optics Letters 2009年第9期7卷 756-759页

作者：王珍媛顾铮■ College of Optoelectric and Electric Information Engineering University of Shanghai for Science and Technology Laboratory of Photo-Electric Functional Films College of ScienceUniversity of Shanghai for Science and Technology

A novel composite model is put forward for humidity-sensitive material based on Maxwell-Garnett and effective medium theory. The analytical expression of the relation between effective refractive index and relative humidity is shown with different absorption factors and porosities. The larger the absorption factor is, the higher the refractive index is. The refractive index of humidity-sensitive SiO2 film decreases with the increase of ceramic material porosity. The sensitivity of optical humidity sensor can reach the magnitude of 10-3. In comparison with the experimental humidity-sensing curve by the method of p-polarized reflectance and the analysis of mechanism, theoretical simulation is in agreement with experimental results. Therefore, this composite model is proved to be reasonable which lays new theoretical foundation in further research on optical humidity sensor.

关键词： Absorption Ceramic materials Garnets Humidity sensors Light refraction Moisture Refractive index Refractometers Silicon compounds

EXACT SOLITRAY WAVE SOLUTIONS ANDSINGULAR SOLUTIONS TO THETWO-DIMENSIONAL NONLINEARDISSIPATIVE-DISPERSIVE SYSTEM

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Acta Mathematica Scientia 2002年第2期22卷 249-253页

作者：李志斌陈天华 Department of Computer Science East China Normal University Shanghai 200062 China

An algorithm for constructing exact solitary wave solutions and singular solutions for a class of nonlinear dissipative-dispersive system is presented. With the aid of symbolic manipulation system Maple, some explicit... 详细信息

关键词： Nonlinear system exact solutions symbolic manipulation

Generation of tunable multi-wavelength optical short pulses using self-seeded Fabry-Perot laser diode and tilted multimode fiber Bragg grating

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Chinese Optics Letters 2011年第4期9卷 48-51页

作者：蔡同健刘云启张小贝王廷云 key Lab of Specialty Fiber Optics and Optical Access Network School of Communication and Information EngineeringShanghai University

We experimentally demonstrate the simultaneous generation of tunable multi-wavelength picosecond laser pulses using a self-seeding configuration that consists of a gain-switched Fabry-Perot laser diode （FPLD） with an external cavity formed by a tilted multimode fiber Bragg grating. Dual- and triple-wavelength pulses are obtained and tuned in a flexible manner by changing the temperature of the FPLD. The side mode suppression ratio larger than 25 dB is achieved at different dual- and triple-wavelengths and the typical pulsewidth of the output pulses is ,-70 ps. In the experiment, the wavelength separation can be narrowed to 0.57 nm.

关键词： Fabry Perot interferometers Fiber Bragg gratings Fiber optic components Fiber optic sensors Multimode fibers

Multianalyte Biosensor for Simultaneous Determination of Glucose and Galactose Based on Micromachined Chamber-type Electrodes

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Chinese Journal of Chemistry 2004年第9期22卷 908-912页

作者：贾能勤章宗穰朱建中张国雄 Department of Chemistry College of Life and Environmental ScienceShanghai Normal UniversityShanghai 200234China State key Laboratory of Transducer Technology Shanghai Institute of MetallurgyChinese Academy of SciencesShanghai 200050China

An amperometric multianalyte biosensor for the simultaneous determination of glucose and galactose was de-veloped based on chamber-type electrodes, which were fabricated by micromachining technology. The dual cham-ber-type enzyme electrode with glucose and galactose sensor elements was integrated onto one microchip. The ex-perimental parameters of this biosensor were optimized. The biosensor exhibited a linearity of up to 4.0 mol/L for glucose and 4.5 mol/L for galactose, and the response time was about 30 s for glucose and 40 s for galactose. No cross-talking behavior was investigated in the course of simultaneous measurement of the two analytes. Interference from electroactive species, such as ascorbic acid and uric acid, was minimized due to the permselectivity of Nafion film. In addition, the biosensor displayed a storage stability of longer than one month.

关键词： multianalyte biosensor micromachining technology chamber-type electrode

Explosive synchronization of multi-layer frequency-weighted coupled complex systems

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Chinese Physics B 2019年第7期28卷 168-173页

作者： Yan-Liang Jin Lin Yao Wei-Si Guo Rui Wang Xue Wang Xue-Tao Luo key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication Shanghai Institute for Advanced Communication and Data Science Shanghai University Shanghai 200072 China School of Engineering University of Warwick Coventry UK Alan Turing Institute London UK

Synchronization is a phenomenon that is ubiquitous in engineering and natural *** study of explosive synchronization on a single-layer network gives the critical transition coupling strength that causes explosive ***, no significant findings have been made on multi-layer complex *** paper proposes a frequency-weighted Kuramoto model on a two-layer network and the critical coupling strength of explosive synchronization is obtained by both theoretical analysis and numerical *** is found that the critical value is affected by the interaction strength between layers and the number of network *** explosive synchronization will be hindered by enhancing the interaction and promoted by increasing the number of network *** results have importance across a range of engineering and biological research fields.

关键词： explosive synchronization Kuramoto model complex systems

AN AFFINE SCALING INTERIOR ALGORITHM VIA CONJUGATE GRADIENT PATH FOR SOLVING BOUND-CONSTRAINED NONLINEAR SYSTEMS

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Journal of Computational Mathematics 2008年第4期26卷 578-597页

作者： Chunxia Jia Detong Zhu Mathematics and Sciences College Shanghai Normal University Shanghai 200234 China Business College Shanghai Normal University Shanghai 200234 China

In this paper we propose an affine scaling interior algorithm via conjugate gradient path for solving nonlinear equality systems subject to bounds on variables. By employing the affine scaling conjugate gradient path search strategy, we obtain an iterative direction by solving the linearize model. By using the line search technique, we will find an acceptable trial step length along this direction which is strictly feasible and makes the objective func- tion nonmonotonically decreasing. The global convergence and fast local convergence rate of the proposed algorithm are established under some reasonable conditions. Furthermore, the numerical results of the proposed algorithm indicate to be effective.

关键词： Conjugate gradient path Interior points Affine scaling.