Fabrication and Properties of (W-Mo-Ni)N Composite Thin Film by Magnetron Sputtering

过渡金属氮化物由于其优异的综合性能，在现代工业中已被广泛的应用于机械加工，航天航空，微电子等领域。氮化钨和氮化钼薄膜具备较高的硬度和耐磨性，其热稳定性良好，耐腐蚀性强。在一般情况下，复合薄膜往往具有单一薄膜所不具备的综合性能，具有更强的实用性。在氮化物复合薄膜中，当薄膜中加入原子分数为15%-20%铜或镍等软质相元素时，薄膜的韧性更好硬度更高，因此，本文采用原子比为40:40:20的钼钨镍合金作为靶材，利用磁控溅射设备，制备具有高硬度、高耐磨性、综合性能良好的钼钨镍复合氮化膜。 本实验采用304不锈钢和单晶硅作为基底，在高真空(10-3Pa)条件下，以氩气作为放电气体，氮气作为反应气体，通过...Transition metal nitrides have excellent comprehensive performance, and they have been widely used in mechanical processing, aerospace, microelectronics and other fields in the modern industry. Tungsten nitride and molybdenum nitride thin film with high hardness and well wear resistance, its thermal stability and corrosion resistance are strong. In general, composite films tend to have better comp...学位：工学硕士院系专业：物理科学与技术学院_工程硕士(电子与通信工程)学号：1982013115299

Atmospheric-pressure Plasma Interaction with Thymidine in Aqueous Solution

胸腺嘧啶(THyMInE)是遗传物质的组成成分之一,为了研究等离子体对遗传胸腺嘧啶(THyMInE)的作用过程,利用大气压等离子体对作为遗传物质的胸腺嘧啶(THyMInE)及对应的胸腺嘧啶脱氧核苷(THyMIdInE)进行处理,为了避免空气对遗传物质的影响,采用水中放电装置进行了相关研究。研究结果表明:不同气体等离子体处理后,胸腺嘧啶脱氧核苷会分解为胸腺嘧啶,且氮气等离子体处理时分解速率快于氩气等离子体处理;另外,空气等离子体与氧气等离子体处理后,胸腺嘧啶脱氧核苷会分解产生两种新产物,分别为胸腺嘧啶+OH和胸腺嘧啶脱氧核苷+OH。该研究对了解大气压等离子体对细菌失活的机制具有一定指导作用,同时对等离子体与生物体作用有着积极的指导意义。The cold atmospheric-pressure plasmas have great application prospects in the fields of biomedicine, such as killing virus, sterilization, cancer cells ablation, and surface treatment of organism tissue, etc.Some reports have indicated that the cold atmospheric-pressure plasmas will modify the genetic material(RNA and DNA) in organism tissue.Thymine is one of the components of genetic material.In this paper, in order to study the effect of plasma on genetic Thymine process, Thymine and Thymidine in the aqueous solution were treated by plasma.In order to avoid the effect of air on experiments, a new discharge device was designed to generate large-area plasma in aqueous media.The results show that,after different gas plasma processing, Thymidine decomposes for thymine; After air plasma and oxygen plasma treatment, Thymidine can produce two new decomposition products: Thymine +OH and Thymidine +OH.The study of DNA degration caused by plasma has certain instruction function in biomedicine.福建省自然基金(2014J01025); 国家自然科学基金(11275261)~

Comparison between the Electroless Copper Plating Processes Using Sodiu m Hypophosphite and For maldehyde as Reductants

比较并评价了以甲醛和以次磷酸钠为还原剂的化学镀铜工艺。结果表明,次磷酸钠镀铜液的稳定性高于甲醛镀铜液,次磷酸钠镀液的沉积速率高于甲醛镀液。以甲醛为还原剂的镀层晶粒细小,而以次磷酸钠为还原剂的镀层呈团粒状。甲醛镀铜层铜的质量分数接近100%,次磷酸钠镀铜层中铜的质量分数为93.9%,镍的质量分数为6.1%,镀层为铜-镍合金。以甲醛为还原剂的化学镀铜层的电导率、抗拉强度、延伸率等物理性能均优于次磷酸钠化学镀铜层。The processes of the electroless copper plating using sodium hypophosphite and formaldehyde as reductants were compared and evaluated.The results show that the electrolyte using sodium hypophosphite as reducing agent is more stable than that using formaldehyde as reducing agent;the electroless deposition rate of the sodium hypophosphite solution is higher than that of the formaldehyde bath;the deposit grains are very fine and dense when using formaldehyde as reductant,and the other is of agglomerate morphology;the copper content in formaldehyde's deposit is nearly 100%(wt),and the deposit from sodium hypophosphite bath contains 93.9%(wt) copper and 6.1%(wt) nickel;the conductirity,tensile strength and ductibility of formaldehyde's deposit are better than that from the sodium hypophosphite solution.国家科技攻关计划资助项目(2004BA325C

Electrochemical Study on Electroless Copper Plating Using Sodium Hypophosphite as Reductant

Correspondent, E-mail: [email protected]; Tel/Fax: +86592-2181436.[中文文摘] 通过电化学方法研究了以次磷酸钠为还原剂,柠檬酸钠为络合剂的化学镀铜体系．应用线性扫描伏安法,检测了温度、pH值、镍离子含量对次磷酸钠阳极氧化和铜离子阴极还原的影响．结果表明,升高温度能够加速阳极氧化与阴极还原过程;pH值的提高可促进次磷酸钠氧化,但抑制铜离子还原;镍离子的存在不仅对次磷酸钠的氧化有强烈的催化作用,而且与铜共沉积形成合金．该合金有催化活性,使化学镀铜反应得以持续进行．[英文文摘] The process of electroless copper plating, using sodium hypophosphite as the reductant and sodium citrate as the chelating agent, was studied using linear sweep voltametry. The effects of temperature, pH, and concentration of nickel ion on the anodic oxidation of hypophosphite and the cathodic reduction of copper ion were tested. The results indicated that the higher ultrasonic bath temperature accelerated both the anodic and the cathodic processes. The increasing pH value promoted hypophosphite oxidation, whereas it blocked the reduction of the copper ion. The nickel ion not only intensively catalyzed the hypophosphite oxidation, but also codeposited with the copper ion to form the Cu-Ni alloy. With regard to its catalytic activity, this alloy enabled the continuation of the electroless copper plating reaction.国家科技攻关计划项目(2004BA325C)资

Studies on Cu-Ni alloy electroless plating using sodium hypophosphite as reductant

研究了以次磷酸钠为还原剂的化学镀铜过程。分析了温度、pH、硫酸镍含量对化学镀铜沉积速率的影响及镀层的表面形貌和结构。结果表明,沉积速率随着镀液温度、pH和N i离子浓度的提高而增大。镀层组分含量和XRD实验结果表明镀层为铜镍合金,呈面心立方结构,晶面间距d与晶胞参数a与标准Cu-N i的相比略大。SEM实验表明,镀层表面形貌为团粒状,颗粒大小较不均匀。The process of the electroless copper plating(using) sodium hypophosphite as reductant was studied.The influences of temperature,pH,nickel sulphate content on deposition rate of copper electroless plating as well as the surface morphology and structure of the deposit were(analyzed.)The results show that the deposition rate is(accelerated) with increasing bath temperature,pH value and the concentration of nickel ion.Both deposit composition and XRD results indicate that the deposits are Cu-Ni alloy with face-centered cubic structure.Its structural parameters of d and a are slightly larger than that of the standard Cu-Ni(alloy).SEM experiment displays that the deposit has a(surface) morphology of granular structure with uneven grain sizes.国家科技攻关计划项目(2004BA325C

中国国际科学合作中的”华人现象“

将8 个国家的合作论文分成五种类型，重点考察了中国在与8 个国家的合作中所呈现的“华人现 象”。分析表明，海外华人（包括短期在外的科研人员）在现阶段正在发挥桥梁作用，在中国国际合作中表 现得非常活跃。分析了导致“华人现象”的社会基础和政策效应

滦县M_L=4.8地震的局部多台数字记录

据中国数字地震台网测定,2004年1月20日16时34分11.9秒在滦县发生了ML=4.8的地震,震中位于东经118.77°,北纬39.71°,震源深度H=10km。尽管地震造成的破坏轻微,但有感范围较大,在秦皇岛市、青龙县、北京市、廊坊市、天津市等地均有震感。这次地震使震中及其附近地区的5台数字强震仪触发,记录了5组3分量数字加速度记录。本文对这次地震事件、地震地质概况作了简要介绍,并就台站(阵)基本背景资料、数字强震仪主要技术指标作了详细说明。最后,对获取的15条数字加速度记录作了初步处理分析,如基线校正、加速度峰值计算、傅里叶谱及反应谱计算等

Identification of Vibrio tubiashii isolated from diseased pond-cultured sea cucumbers( Apostichopus japonicus)

2013年春季,福建漳州地区池塘养殖刺参(APOSTICHOPuS JAPOnICuS)感染不明病原而患病。病参表现出排脏、身体萎缩、体表溃烂等症状,俗称为“腐皮综合征“。为确定引起该病的病原菌,从患病刺参病灶部位分离得到1株优势菌fJy001,经回接感染试验,证实所分离的细菌为刺参的病原菌。经形态、生理生化、16S rrnA序列分析和bIOlOg微生物自动鉴定系统等多项指标鉴定,确定该病原菌为塔式弧菌(VIbrIO TubIASHII)。In the spring of 2013,the pond-cultured sea cucumbers( Apostichopus japonicus) were infected by an unrestrained pathogen in Zhangzhou City of Fujian Province.The sea cucumbers with the disease tentatively termed as"skin ulcerative syndrome"showed symptoms such as viscera ejection,general atrophy and skin ulceration.To determine the bacterial pathogen that caused the disease,one strain( FJY001) was isolated from the lesions of diseased sea cucumbers.Pathogenicity of the strain was confirmed by artificial infection and the strain was identified as Vibrio tubiashii by indicators of morphological,physiological and biochemical characteristics as well as sequencing of 16 S rRNA and identification of Biolog microbiol system.福建省科技厅公益类科研专项(2010R1002-3); 福建省水产研究所科研发展基金资助项目(2014fjscq04

The Size and Shape Effects on the Optical Properties of Gold Nanoparticles

【中文文摘】纳米尺度的金属及半导体呈现出特殊的光学、电学及磁学性质,采用近年发展起来的离散偶极近似(DDA)的方法,我们分析了金纳米粒子的尺寸及形状对其光学性质的影响。粒子周围介质的影响在文中亦作了分析。计算结果显示,金纳米粒子的等离子体吸收带同时受到粒子尺寸和形状的影响,但来自形状的影响更为明显。与米氏理论及扩展的甘氏理论相比较,DDA方法在粒子尺寸不再远小于入射光波长的时候更准确,并能应用于任何形状的纳米粒子。理论计算与实验结果能较好的吻合。 【英文文摘】Metals and semiconductors exhibit unusual optical, electronic, and magnetic properties at the nanometer scale. Based on the newly developed method, discrete dipole approximation (DDA), the dependence of the optical properties of the gold nanoparticles on the size and shape was analyzed. The effects of the surrounding medium were also taken into consideration in the calculation. The calculated results show that the plasmon absorption band depends on both the size and shape of the gold noanoparticles. However , the influence of the shape is more significant . Compared to the Mieps theory and the extension , Gansp theory , the DDA method is more accurate when the dimensions of the particles are not much smaller than the wavelength of the incident light and can be applied to particles of any shape. The theoretical results are in good agreement with the experimental data.国家自然科学基金项目,批准号为 :20003008,2983306

耐热高活性改进铜基甲醇合成催化剂

耐热高活性改进铜基甲醇合成催化剂Ｈｅａｔ－ｒｅｓｉｓｔａｎｔａｎｄＨｉｇｈｌｙＡｃｔｉｖｅＭｏｄｉｆｉｅｄＣｏｐｐｅｒ－ｂａｓｅｄＣａｔａｌｙｓｔｓｆｏｒＭｅｔｈａｎｏｌＳｙｎｔｈｅｓｉｓ杨意泉，张鸿斌，郭忠平，陈汉忠（厦门大学化学化工学院）周文成，..