蓝光材料9,10-二(β-萘基)蒽的合成与光谱分析

采用还原β-萘基锂与蒽醌的加成物制备了有机电致蓝光材料9,10-二(β-萘基)蒽(ADN)。通过红外、核磁共振对其结构进行了表征。利用紫外可见吸收光谱、循环伏安法和荧光光谱等研究了其HOMO、LUMO能级及发光性能。紫外可见吸收光谱有2个吸收带,其中E带有2个吸收峰,波长分别为232nm、260nm;B带有3个吸收峰,其波长分别为359nm、377nm、398nm,ADN的吸收带边为420nm,计算其能级差为2.95eV。采用398nm的激发光激发,荧光发射峰值波长为426nm,半峰宽为56nm,有很好的蓝光色纯度。通过循环伏安法测得其氧化峰电位为1.28 V,推算出ADN的HOMO能级为5.60 eV,LUMO能级为2.65 eV。     

芦荟大黄素在不同溶剂体系中的光谱特性研究

目的:检测芦荟大黄素在不同溶剂体系中的光谱特性,为芦荟大黄素的光动力学研究提供试验资料.方法:用紫外可见分光光度计和荧光分光光度计测定芦荟大黄素在二甲基亚砜,生理盐水,人血白蛋白中的吸收光谱和荧光光谱.结果;芦荟大黄素在二甲基亚砜,生理盐水,人血白蛋白中最大吸收波长分别为415nm、421nm、420nm,荧光最大激发波长为422nm、435nm、426nm,荧光最大发射波长为583nm、575nm、580nm.     

基于激光遥感的酒驾遥感探测技术研究

为了更精确定量遥测酒驾人员呼出气体中的酒精气体浓度，采用同时测量酒精气体浓度和水汽浓度且同步获取车内酒精气体稀释系数的双谱段定波长激光遥感探测方法，进行了酒精浓度、水汽浓度的反演算法以及稀释系数计算的理论分析和对吸收光谱的实验验证，取得了酒精气体和水汽光谱吸收特性，确定了所用激光波长为1392nm和1412nm。结果表明，该方法可以排除水汽干扰且获得酒气稀释系数，可更精确定量测量呼出气体中的酒气浓度。     

黑色海水珍珠和人工处理黑珍珠的光谱学特征研究

选用天然黑色海水珍珠、活性超级黑染色黑珍珠、辐照处理黑珍珠和硝酸盐染色黑珍珠,对其进行拉曼光谱测试、紫外可见吸收光谱测试的研究。两项测试表明:拉曼光谱中天然黑色海水珍珠、硝酸银染色和辐照黑珍珠均出现1080cm-1和699cm-1文石的特征拉曼峰,辐照黑珍珠荧光背景较强,染料染色黑珍珠的出峰位置与所使用染料的类型有关;紫外可见吸收光谱中,天然黑色海珍珠出现284nm和357nm两个吸收峰,染料活性超级黑染色珍珠出现380nm吸收峰,应为357nm吸收峰发生红移所致,银盐染色黑珍珠和辐照处理黑珍珠紫外区吸收峰消失。根据拉曼和紫外可见光谱特征,可以快速、无损地鉴定天然黑色珍珠和各种着色黑珍珠。     

微量Co2+掺杂ZnO粉体的结构和光学性能研究

采用球磨法制备了Zn1-xCoxO(x=0,0.004,0.008)纳米粉体,分别利用XRD,PL光谱和紫外-可见吸收光谱对样品进行了表征。XRD图谱显示样品呈六方纤锌矿结构,随着Co2+离子掺杂量的增加,晶格常数和平均晶粒尺寸略有减小。在PL光谱上观察到三个发光带:370nm处的本征发光峰、468nm附近的强蓝光发光峰,以及533nm附近的绿光发光峰。和球磨样品相比,1 200℃退火的样品的发光强度明显增强,这归因于退火使样品晶粒长大。在紫外-可见吸收谱上可以观察到两个吸收带:由ZnO的带隙吸收引起的360～388nm的强紫外吸收带和由Co2+离子的d-d跃迁引起的565nm附近的可见光吸收带。因此通过调节Co2+掺杂量和选择适当的退火温度可制备高质量的发光材料。     

热处理对紫色翡翠光谱学特征影响的研究

使用X射线衍射仪(XRD)、紫外-可见吸收光谱仪(UV-VIS)与拉曼光谱仪,对进行氧化气氛热处理前后的紫色翡翠样品进行光谱测试。XRD分析结果显示,紫色翡翠样品中95%以上是硬玉成分。热处理前后的紫外-可见吸收光谱对比结果显示,样品热处理后的光谱和热处理前相比,437nm处尖峰以及580nm处吸收包基本消失;而拉曼光谱图对比结果显示,热处理后黄褐色部位拉曼峰值基线整体呈上升趋势。分析结果表明,紫色翡翠样品主要致色离子为Fe2+,在经过热处理后,Fe2+氧化成为Fe3+,生成Fe2O3,从而致使热处理后的紫色翡翠样品呈现出黄褐色。     

乙酸的光谱学及其特性的研究

采用光栅光谱仪获得了波长为 2 5 4nm(Δλ1 /2 4nm)的紫外光激励乙酸溶液的紫外吸收光谱和不同浓度溶液的荧光光谱 ,并对其产生机理和谱线特性进行了研究。实验结果和理论分析表明 ,波长为 2 5 4nm的紫外光诱导乙酸分子发出的荧光是由乙酸分子上的荧光团 -C =O -产生的 ,其量子转换效率可达 5 0 %以上 ;乙酸溶液的荧光量子产额将随浓度发生明显的变化。研究乙酸的紫外光谱和荧光光谱及其特性可为其作为溶剂和催化剂时对其他有机大分子光谱特性的影响提供参考     

邻香草醛缩环己二胺类希夫碱及其锌配合物的合成与性能

合成了邻香草醛缩环己二胺类希夫碱(1)及其锌配合物(2),通过红外和元素分析测试手段来确定它们的结构.配合物(2)的紫外-可见吸收光谱和光致发光光谱表明,在紫外激发下,有效的能量从配体转移到金属离子.电化学带隙与紫外-可见光谱吸收边估计的带隙基本一致.结果分析表明,在365nm波长的紫外激发下,化合物(2)能产生强烈的蓝光发射,最高发光波峰在460nm处,谱线带宽72.2nm.化合物(2)明亮的光致蓝光发射有望用在有机电致发光器件(OLED)中.     

邻香草醛缩环己二胺类希夫碱及其锌配合物的合成与性能

合成了邻香草醛缩环己二胺类希夫碱(1)及其锌配合物(2),通过红外和元素分析测试手段来确定它们的结构.配合物(2)的紫外-可见吸收光谱和光致发光光谱表明,在紫外激发下,有效的能量从配体转移到金属离子.电化学带隙与紫外-可见光谱吸收边估计的带隙基本一致.结果分析表明,在365nm波长的紫外激发下,化合物(2)能产生强烈的蓝光发射,最高发光波峰在460nm处,谱线带宽72.2nm.化合物(2)明亮的光致蓝光发射有望用在有机电致发光器件(OLED)中.     

硝化纤维紫外激发荧光光谱分析研究

为了研究硝化纤维的荧光光谱和定量方法,利用紫外激发荧光技术,首先对硝化纤维丙酮溶液进行了荧光分析,通过三维扫描得到了硝化纤维的紫外激发荧光光谱,确定了最大荧光相对强度时激发波长为355.0 nm、发射波长为354.5 nm;然后在发射波长354.5 nm条件下,测定了不同浓度的硝化纤维丙酮溶液荧光相对强度,对试验结果进行了线性回归,确定了硝化纤维的定量方法。     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.