中国科技论文在线

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2005年03月04日

【期刊论文】Calibration of Spring Constant of an AFM Cantilever for the Study on Ligand-Receptor Interaction

胡小唐， Yi Ran*a， Li Yanning a， Wang Yanxia a， Fu Xing a， Hu Xiaotang a

2nd International Symposium on Instrumentation Science and Technology Aug. 18～22, 2002, Jinan. China，-0001，（）：

-1年11月30日

A new way of calibrating the spring constant by measuring both resonant frequencies of the cantilever in air and in liquid is presented. By relating the two frequency values, the density and viscosity of the liquid, the precise spring constant value can be obtained. As a ondestructive method and without other apparatus, it is an easy way of cantilever calibration especially suitable for the study of ligand-receptor interaction and using AFM in aqueous as well.

AFM cantilever,， force-separation curve,， resonant frequency,， spring constant.，

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2005年03月04日

【期刊论文】Analysis of electric field-induced fabrication on Au and Ti with an STM in air

胡小唐， Xiaodong Hu*， Jing Yu， Jinping Chen， Xiaotang Hu

Applied Surface Science 187(2002)173-178，-0001，（）：

-1年11月30日

摘要

Studieds of the modification mechanism of Au and Ti surfaces by electric fields applied with a scanning sunneling microscope (STM) are carried out at atmospheric pressure and room temperatute. For pulses of 1-100μs, nanodots can only be formed on Ti under conditions where the current shows substantial fluctuation, indicating tip-sample contace. If the field is applied gradually, Au is not affected and pits are formed on Ti. We interpert pit formation as a result of fiele-induced oxidation. Moreover, experiments show that the relative humidity plays an important part in nanostructure formation on Ti. Our results can be explained through a combination of direct contact and oxidation inducedby electricf field.

STM， Contact， Oxidation， Nanfabrication， atmophere

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2005年03月04日

【期刊论文】New Scanning Mode of Scanning unneling Microscopy

胡小唐， Fu Xing *， Wei Xiaolei， Li Mengchao， Hu Xiaotang

2nd International Symposium on Instrumentation Science and Technology Aug. 18～22, 2002, Jinan. China，-0001，（）：

-1年11月30日

摘要

The coincidence scanning mode has been developed by analyzing feedback equations for constant-current scanning and imaging surfaces with atomic resolution with the new mode.This mode can be almost applied to the feedback control of all sorts of SPM instruments,and reduces the scanning time to 60%.

STM,， scanning mode,， coincidence scanning

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2005年03月04日

【期刊论文】三维一体化超微定位系统性能的研究

胡小唐，胡晓东

，-0001，（）：

-1年11月30日

摘要

本文提出了一种以双柔性平行四杆结构和柔性八杆对称联动结构为导向机构、压电陶瓷为驱动器的三维一体化超微定位机构。针对高精度定位的需要，设计了数字闭环控制系统，引入数字 PID模糊控制器以提高系统的定位性能。

3D monolithic ultra-micropositioning,， Double flexure parallel four-bar mechanism,， Flexure eight-bar symmetric linkage mechanism,， Piezoelectric actuator,， PID fuzzy controller

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