掺铁碳化硅陶瓷的制备及其吸波性能

将羰基铁和液态聚碳硅烷(LPCS)反应生成的铁(Fe)溶胶与固态聚碳硅烷(PCS)混合,合成出不同Fe质量分数的PCS先驱体,然后经氧化交联和高温热解制备了不同Fe质量分数的磁性碳化硅陶瓷(Fe/SiC),系统地研究了Fe元素的引入对SiC陶瓷的组成、结构、磁性能和介电性能的影响规律。研究发现,当Fe质量分数小于8.94%时,在热解过程中,Fe元素可以显著促进SiCxOy的分解,生成β-SiC,且随着Fe质量分数的增加,β-SiC的结晶峰越来越强;但随着Fe质量分数继续增加,达11.78%时,则主要生成Fe3Si;Fe/Si C陶瓷均呈铁磁性,其饱和磁化强度随着Fe质量分数的增加而呈指数形式增加;当Fe质量分数为4.19%时Fe/SiC陶瓷在12.4 GHz具有最小的反射损耗,为-9.4 dB,同时低于-5 dB的带宽为2.4 GHz,Fe质量分数为8.94%时,低于-5 dB的带宽则为3.7 GHz,可用作良好的微波吸收材料。国家自然科学基金(51603175);;中央高校基本科研业务费(20720150082)资助项目~

从中国非甲-庚型肝炎病人中克隆到TT病毒样DNA序列

从中国非甲－庚型肝炎病人中克隆到ＴＴ病毒样ＤＮＡ序列张军１杨海杰１苏智军２张奕返２林长青１黄鹤１郭庆１王颖１曾定１夏宁邵１（１厦门大学肿瘤细胞工程国家专业实验室厦门３６１００５２福建省泉州市第一医院泉州３６２０００）肝炎是严重危害我国人民身体健康的疾..

Simplifying the Creation of Hollow Metallic Nanostructures: One-Pot Synthesis of Hollow Palladium/Platinum Single-Crystalline Nanocubes

通讯作者地址: Zheng, NF (通讯作者), Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 2. Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Peoples R China 电子邮件地址: [email protected],20871100,20721001 MSTC,2009CB930703 Chinese Ministry of Education 108077 RFDP 200803841010 Key Scientific Project of Fujian Province of China 2009HZ1010

An Assembly Route to Inorganic Catalytic Nanoreactors Containing Sub-10-nm Gold Nanoparticles with Anti-Aggregation Properties

通讯作者地址: Zheng, NF (通讯作者), Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 2. Xiamen Univ, Dept Chem, Xiamen 361005, Peoples R China 3. Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA 电子邮件地址: [email protected], [email protected] Ministry of Education,108077 NNSFC,20871100 20721001 20423002 MSTC,2007CB815303 2009CB930703 NFFTBS,J063042

Research of cathode material LiCoO_2 micro thin films lithium-ion batteries

研究了应用于微型全固态薄膜锂离子电池的正极材料钴酸锂LiCoO_2薄膜材料,采用磁控溅射法来制备,对其进行400℃退火处理后,进行XRD分析和SEM分析,表明在低气压条件下制备的薄膜呈非晶态,经过退火后,形成了排列致密的晶体结构,薄膜沿(003)晶面平行于基底择优生长;循环伏安测试和恒电流充放电测试表明,未经过退火处理的LiCoO_2薄膜不具有锂离子嵌入/脱出的可逆性,而经过退火处理的LiCoO_2薄膜从第二圈开始具有较好的可逆性。制备的LiCoO_2薄膜结晶状态优良、质地紧密、与衬底薄膜紧密接触、循环性能和循环充放电性能良好,可以用于微型全固态薄膜锂离子电池。As positive electrode material,LiCoO_2 thin films used for all-solid-state thin film lithium ion microbattery are studied. The phase of LiCoO_2 thin films are amorphous,it is fabricated by magnetron sputtering in low gas pressure and it changes to crystalline and array closely after annealed at 400 ℃. The electrochemical properties of LiCoO_2thin-films are then investigated. The cyclic voltammetry and constant current charge-discharge tests indicate that the LiCoO_2 thin films without annealed have no oxidation / reduction peaks,which indicates that they do not have lithium-ion insertion / extrusion of reversibility,while the LiCoO_2 thin films after annealed have a good reversibility from the second lap. The prepared LiCoO_2 thin films closely adhere to the substrate with good crystalline state,close texture and good cycling performance,can be used for all-solid-states thin film lithium-ion microbatteries.国家自然科学基金资助项目(60976082,60936003

基于FPGA和ARM架构的OTDR方案

为开发实用便携的嵌入式OTDR（光时域反射仪）,文章提出了一种采用FPGA（现场可编程门阵列）进行数据采集和累加平均等简单处理、ARM（精简指令集处理器）进行人机交互和数据分析的设计方案。介绍了该系统的工作原理、硬件设计和软件设计,并对其中FPGA程序进行了重点阐述。实验结果表明,此设计方案融合了两种芯片的特性和优势,系统性能获得了较大提升

Optimization of the Wet Transfer Technique of Graphene

石墨烯的转移过程决定着石墨烯的品质,进而对石墨烯基器件的性能有重要的影响。针对化学气相沉积（CVD）法生长的石墨烯在湿法转移过程中存在的问题,在常规湿法转移的基础上进行了优化研究。实验结果表明：基体背面石墨烯的刻蚀工艺可以有效解决铜箔残留问题;采用二次涂胶工艺可以大幅降低石墨烯的裂痕破洞密度;超声波处理有效提升了石墨烯表面残胶的去除效率。优化后的转移工艺可以明显降低石墨烯产品中的杂质数量和缺陷密度,提升石墨烯的表面洁净度,显著地提高石墨烯质量。The transfer process of graphene plays an important role in determining the quality of graphene,which further exerts an important influence on the performances of graphene-based devices.For resolving the problem in the wet transfer process of graphene grown by the chemical vapor deposition（CVD）method,the optimized procedure was researched based on the conventional wet transfer of graphene.The experimental results show that the residue of copper is effectively eliminated by an extra etching of the graphene deposited on the back of copper.The densities of surface cracks and holes are largely reduced with the two-step coating process.The removal efficiency of the residual polymer on the surface of graphene is significantly enhanced by the ultrasonic treatment.The optimized transfer procedure can obviously reduce the amount of impurities and defect density of graphene and significantly improve the surface cleanliness and quality of graphene.厦门市科技项目（3502Z20143003

Effects of Long-term Application of Chemical Fertilizer on Food Production and Soil Quality Attributes

结合世界各地长期试验的资料 ,从土壤质量的角度综述了施用化肥对小麦、玉米、水稻产量影响 ,并对长期施用化肥条件下土壤有机碳积累、剖面硝态氮累积和土壤理化性状的演变进行了分析

~(19)F+~(93)Nb耗散反应的相互作用时间

测量了1 9F + 93Nb耗散反应产物的激发函数与角分布 .从角分布的斜率提取的该反应系统的平均寿命在对称性较大的入射系统中反映了系统中耗散产物的特征时间 ;通过能量自关联函数方法从激发函数提取的反应时间不论在对称的还是在非对称的入射系统中都反映了耗散产物的特征时间 .能量自关联函数还可以给出双核系统的转动角速度以及表征转动阻尼的退相干宽度 ,更好地描述双核系统随时间的整个演化过程

艾滋病毒重组抗原及第三代艾滋病毒抗体EIA诊断试剂盒的研制

近年来中国的艾滋病毒(HIV)感染人数以每年30％的速度增长,HIV感染者总数已超过60万人,感染者已从吸毒人员、献血员等高危人群扩展到社会各个阶层,我国已处于艾滋病泛滥前的关键时期。HIV诊断试剂盒是HIV防制工作中最重要的技术工具。用于人群筛检的HIV诊断试剂盒已历经三代,第一代试剂盒主要使用来自细胞培养的HIV病毒的裂解产物作为抗原;第二代产品使用基因工程重组抗原和/或人工合成肽作为抗原,使包被抗原中免疫优势区的比例明显增强,从而提高了试剂的灵敏度,而且标准化生产的相对更纯的抗原的使用使试剂的特异性和重复性均大为提高。前两代试剂均采用间接法原理,即先以抗原包被聚丙乙烯板,再加入待检血清,最后加入酶标记的抗人Ig