采用光纤技术实现拉曼光谱和扫描隧道显微镜实时联用测试

设计并制作了与扫描隧道显微镜（ＳＴＭ）探头和拉曼光谱仪相适配的光纤探测装置，该装置采用配有不很短焦距的自聚焦透镜以获得较大的相对孔径，并使用多束光纤以充分利用扫描隧道显微镜探针周围有限空间，提高了拉曼散射光的收集效率，获得具有较高信噪比的拉曼谱图，在该装置的基础上进一步建立拉曼－扫描隧道显微镜联用系统，初步实验表明该联用系统用于实时研究固／气和固／液界面体系是可行的，即利用扫描隧道显微镜可获得固体     

核径迹孔有关的介观现象

 20世纪前期形成了以量子力学为代表的研究微观世界的科学体系.人们认识到,原子(～(?))或更小尺度范围的物质运动规律与我们日常观察到的宏观范围的物质运动规律有根本的差别.     

扫描隧道显微镜中场蒸发过程的理论分析

从电热动力学(Electrothermodynamics)角度出发，分析了扫描隧道显微镜(STM)中场蒸发过程.引入了一个有效结合能，并推导得到了STM中的蒸发场强计算公式.用该公式计算得到了与实验一致的金离子的蒸发场强.同时发现传统的电荷交换模型与成象势垒模型，由于它们要求被蒸发原子完全电离并被蒸发到无穷远处，因而对STM计算的蒸发场强偏高. 关键词：     

图像采集自动生物显微镜系统自动调焦的研究

阐述了以ＣＣＤ为光电探测器件，采用步进电机驱动，集工作台自动扫描、自动调焦和图像的自动采集为一体的显微镜系统自动调焦机理，改进了均方差评价函数，完成了自动调焦，为显微图像的采集和处理提供了强有力的手段。     

Experimental Investigation of the Velocity Effect on Adhesion Forces with an Atomic Force Microscope

Capillary forces are significantly dominant in adhesive forces measured with an atomic force microscope (AFM) in ambient air, which are always thought to be dependent on water film thickness, relative humidity, and the free energy of water film. We study the nature of the pull-off force on a variety of surfaces as a function of tip velocity. It is found that the capillary forces are of relatively strong dependence on tip velocity. The present experiment is expected to provide a better understanding of the work mechanism of AFM in ambient air.     

Shear Force Detection Using Single—Tine Oscillating Tuning Fork for Scanning Near—Field Optical Microscopy

We propose a new method to detect near-field by using a single-tine oscillating tuning fork with mechanically asymmetric excitation that exhibits the sensitivity and stability better than that by using a double-tine oscillating one.Comparison of shear forces for the two methods demonstrate that the single-tine oscillating tuning fork provides a simpler and more sensitive method for near-field measurements.A theoretical analysis is presented for explanation to the greater sensitivity,The method is demonstrated by imaging a sparse-packed layer of micro-spheres in size of 200nm.     

An Atomic Force Microscopy Investigation of the Tracks Made by C1^＋－C4^＋ Bombardment on CR－39 Detectors

Carbon micro-clusters are accelerated by an HI-13 tandem accelerator. The plastic nuclear track detectors CR-39are irradiated by C1-C4 beams from the HI-13 tandem accelerator and the tracks in CR-39 are studied using anatomic force microscope (AFM). The depths and diameters of C1-C4 tracks are measured for the first time in ananometre scale. An enhancement of the energy loss is obtained for carbon clusters related to single carbon ionswith the same velocity. The results show that the AFM observation is very useful in the quantitative analysis ofclusters in the track detector CR-39.     

聚合物基片对柔性有机发光器件性能的影响

以聚合物基片柔性ITO膜为透明电极，制备了ITO／TPD／Alq3／Al结构柔性有机发光器件，并与在相同条件下制备的玻璃基片相同结构器件作了比较。研究了不同基片对有机材料及器件性能的影响，指出选择不易吸湿、耐温高、热胀系数小的聚合物材料，提高柔性ITO膜的附着力和导电性，结合柔性ITO膜的具体特性。优化有机层的蒸镀条件，是提高柔性有机发光器件发光亮度和稳定性的重要途径。     

Magnetic Microstructures of PryFe90－yB10 （y = 8－11.76） Nanocrystalline Ribbons Using Magnetic Force Microscopy ＊

Magnetic microstructure of melt-spun PryFe90-yB10 (y = 8, 8.5, 9, 9.5, 10 and 11.76) nanocrystalline ribbons in an as-grown state has been studied using a magnetic force microscope. The magnetic domains are characterized by dark areas adjacent to bright areas in a sub-micron scale and in random distribution. By comparing with the size of the micro-crystals measured from the TEM image, the exchange coupling effect was confirmed to exist inall the ribbons. Using the roughness analysis, the variation of the root mean-square values of the phase shifts obtained from the magnetic force images versus the content y of Pr were measured, which is very consistent with the curve of the residual induction Bγ versus the content y.