偶联分子对金纳米粒子在玻片上组装的影响

将金纳米粒子组装在用3-氨基丙基-三乙氧基硅烷(APES)修饰的普通玻片上,再分别用偶联分子对巯基苯胺、1,4-二巯基苯在该基底上再次组装金纳米粒子,结果表明用对巯基苯胺作为组装的偶联分子得到双层金纳米粒子结构,对巯基苯胺的表面增强拉曼光谱信号得到增强,而用1,4-二巯基苯作为组装的偶联分子得到单层金纳米粒子结构。     

连续激光诱导Zn/InP掺杂过程中温度分布的解析计算

在实验的基础上，分析表面蒸发Zn的InP样品在连续激光诱导下掺杂Zn过程.在一维热传导问题的第三类边界条件下，给出激光辐照有限厚双层材料Zn/InP温度分布的一种直观简洁的解析形式. 关键词： 激光诱导掺杂 Zn/InP 温度分布     

Atomic-scale simulation of nano-grains:structure and diffusion properties

Nanograins are characterized by a typical grain size from lto 100 nm.Mclecular dynamics aimubations have been carried out for the nanograin sphere with the diameters from 1.45 to 10.12 nm.We study the influence of grain size on structure and diffusion properties of the nanograins.The results reveal that as the grain size is reduced,the fraction of grain surface increases significantly,and the surface width is approximately constant；the diffusicn coefficlent is increased sharply,and the relation of the diffusion coefficient and the grain size is close to exponential relation below 10nm.     

纳米Zr-V-O粉末的XRD及TG-DSC研究

利用机械合金化制备纳米Zr-V粉末，对制备过程的材料进行物相分析和热分析试验。初始粉末Zr（150μm）和V（150μm）元素粉末（纯度99．15％）按原子比1：2或1：1进行混合后在氩气气氛中放入SimoloyerCMol—2球磨仓中，按几种不同的试验条件进行球磨。同时在997K和1047K下热处理40min和1h，并对热处理前后的粉末进行了物相和TG-DSC实验分析。     

介孔网络电路

用二次阳极氧化法制备纳米多孔氧化铝板,然后用磁控溅射方式在纳米多孔氧化铝板表面镀金得到介孔网络电路,对该介孔网络电路进行输运测量,发现其具有非线性电阻.     

Raman properties embeddedof GaSb nanoparticlesin SiO2 films

The Raman shifts of nanocrystalline GaSb excited by an Ar^ ion laser at wavelengths 514.5, 496.5, 488.0, 476.5,and 457.9nm are studied by an SPEX-1403 laser Raman spectrometer respectively, and they are explained by phonon confinement, tensile stress, resonant Raman scattering and quantum size effects. The Stokes and anti-Stokes Raman spectra of GaSb nanocrystals strongly support the Raman feature of GaSb nanocrystals. The calculated optical spectra compare well with experimental data on Raman scattering GaSb nanocrystals.     

Specific Angular Momentum Distribution of Disc Galaxies Formed in Preheated Intergalactic Media

Assuming that baryons within a galactic halo have the same specific angular momentum as the dark matter where they locate initially and a disc forms due to the gas cooling and condensation with the conservation of angular momentum, we investigate the angular momentum distribution in a resulting galactic disc under the new preheated galaxy formation model suggested by Mo and Mao (Mon. Not. R. Astron. Soc. 333 (2002) 768).Compared with the observational results, it can be concluded that the preheated galaxy formation model can match current observations. This model can be a good approach to solve the problems of both the angular momentum catastrophe and the mismatch of angularomomentum profiles in current disc galaxy formation models.     

几种排铅食疗方

金梅饮 :金钱草 1 0g ,乌梅 1 0g,甘草 1 0g ,煎汤去渣 ,约 3 0 0mL ,分 3次喝下。甘草绿豆汤 :甘草 1 0g ,绿豆 5 0g煮汤 ,到绿豆烂 ,不加糖 ,喝汤吃绿豆。胡萝卜牛奶饮 :胡萝卜 5 0g,煮或蒸熟取出压烂 ,加入牛奶 2 0 0mL调匀吃下。金针菇虾肉食品 :金针菇 1 0 0g ,煮熟去汤 ;虾皮稍洗 ;瘦猪肉 2 0 0g共同剁碎 ,加调味品做馅 ,包成饺子、馄饨或包子吃。蒜泥海带粥 :大米 5 0g ,海带 1 5g切碎加水熬粥 ,再加入大蒜泥和调味品 ,稍煮一会儿分几次吃。几种排铅食疗方…     

富勒烯(C_(60)/C_(70))与N,N,N′,N′-四-(对甲苯基)-4,4′-二胺1,1′-二苯硒醚(TPDASe)间光诱导电子转移过程的激光光解研究

富勒烯 (C60 /C70 )与N ,N ,N′ ,N′ 四 (对甲苯基 ) 4,4′ 二胺 1,1′ 二苯硒醚 (TPDASe)间在激光光诱导条件下 ,发生了分子间的电子转移过程 .在可见 -近红外区 ( 60 0～ 12 0 0nm) ,观测到了TPDASe阳离子自由基、富勒烯 (C60 /C70 )激发三线态和阴离子自由基 ,在苯腈溶液中 ,观测瞬态谱测定了电子从TPDASe转移到富勒烯 (C60 /C70 )激发三线态的量子转化产率(ΦTet)和电子转移常数 (Ket) .     

BEPCII直线加速器相控系统设计研究

为了补偿由于各种因素引起的微波相位漂移,BEPCII直线加速器需要建立微波相位反馈控制系统.能量最大法将用来确定每台功率源的最佳相位.沿直线加速器速调管长廊铺设相位稳定同轴线提供相位参考.现在已经完成了关键部件,如PAD单元、IfA 单元的开发.搭建了相控最小系统对系统进行了验证.