Development and application of a variable-temperature scanning-tunneling/atomic-force microscope

变温扫描隧道/原子力显微镜的研制与应用

基本信息

批准号：
07554060
负责人：
ARUGA Tetsuya
金额：
$ 0.9万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

We have developped a new variable-temperature sanned probe microscope in order to study the dynamics of individual surface atoms and mesoscopic clusters under non-equillibrium conditions. In order to study further on the surface dynamics, we have also conducted thermal desorpition and high-resolution electron energy loss spectroscopy to investigate the ordering in the (NO+CO) coadsorption system on the Pd (100) surface and the energy-transfer dynamisc in the H+H/Pd (100) system.The scanned probe microscope developped in the present study can be operated under ultrahigh vacuum and at sample temperature from 100 to 1000K.Another important characteristic is its low-noise signal output. The vertical noise for the topographic imaging mode is 3 pm (p-p), which enables the imaging of (100) and (111) surfaces of transition metals. This microscope can also be operated at tunneling current aslow as 1 pA,which enables imaging of low-conductivity materials such as organic crystals.The ordering in (NO+CO) /Pd/ (100) coadsorption system has been studied by low-energy electron diffraction, thermal desorption and vibrational spectroscopy preparatory to the application of the scanned probe microscope. We have found that NO and CO from stable mixed ordered phases and that an explosive CO2 formation reaction undergoes in the mixed ordered phases. A kinetic Monte Carlo simulation based on a lattice-gas model has been done to quantify NO-CO intermolecular interactions. It was found that the additivity holds for the attractive interaction among NO and CO.We are planning to use the scanned probe microscope to investigate the microscopic mechanism of ordering at surfaces.

我们已经开发了一种新的变性探针显微镜，以研究在非附加条件下单个表面原子和介观簇的动力学。为了进一步研究表面动力学，我们还进行了热解剖和高分辨率电子能量损耗光谱法，以调查PD（100）表面（100）表面（100）表面的（NO+CO）配合系统中的顺序，并且在100）中可以在100个研究中进行示例示例，从而在100个研究中开发了示例中的示例，在扫描型探针中，在扫描型探针中的示例均可在运行中开发。 1000k。另一个重要特征是其低噪声信号输出。地形成像模式的垂直噪声为3 pm（p-p），可以实现过渡金属（100）和（111）表面的成像。该显微镜也可以在隧道电流垂直（1 pA）上进行操作，该隧道能够通过低传导性材料（例如有机晶体）进行成像。（NO+CO） / pd /（100）coadSoraging系统的订购通过低能电子衍射，热降压和振动光谱探测探针的探针的应用来研究了scann scann cann cann cann of Scann cann of Scinn offiperative。我们发现，没有来自稳定混合有序相位的CO，并且在混合有序相中爆炸性CO2形成反应。已经进行了基于晶状体气体模型的动力学蒙特卡洛模拟，以量化无分子间相互作用。发现添加性适用于NO和CO之间的有吸引力的相互作用。我们计划使用扫描的探针显微镜研究表面上有序的显微镜机制。