Research

表面物性研究室へようこそ!

固体表面(第1原子層~第3原子層)の原子構造に関する研究を行っています。研究対象としてきたのは、主に金属単結晶表面、エピタキシャル成長、水素の吸着位置構造の決定です。最近は、絶縁体表面原子構造に関する研究、表面原子の電子状態に関する研究を行っています。絶縁体表面に関する研究は、世界的にも未開拓領域で、この研究に使用する低速原子散乱分光装置の開発をしています。電気的に中性な原子ビームを生成、パルス化します。4He0を使っていましたが、最近は、20Ne0を利用することが多いです主として利用する実験方法は、超高真空(10-8 Pa)における低速イオン散乱分光法(ISS)、低速電子線回折(LEED)、AES分光法、STMです。電子状態の測定はXPSを利用しています。

Welcome to Surface Science Devision !

It is accepted that well charcterized single crystal surfaces under ultra-high vacuum conditions can be considered as model systems for studying the elementary processes. To understand the nature of physical and chemical interactions at solid surfaces and to characterize surfaces under UHV conditions, we have mainly used low energy electron diffraction (LEED), low energy ion scattering (LEIS), Auger electron spectroscopy (AES), Scanning tunneling microscopy (STM), and X-ray photo emission spectroscopy (XPS). STM and XPS measurements have been used at the different institutes which are cooperative each other. During last twenty years, there has been considerable progress and development of surface structural analysis, metal epitaxy, catalysis, and hydrogen adosorpted position on outermost atom layer. In recent years low energy atom scattering spesctroscopy technique has been developed. All components are home made equipments. It is rare to see such equipments designed and developed by scientists in recent years. RBS/channeling/ERD/NRA studies are one of most familiar techniques for this laboratory. We have been working on these for around twenty years. Here s shown research topic.

(1) Surface atomic structure analysis and metal epitaxy study using LEED, AES, LEIS and STM, Au/Ni(111), Ag/Ni(111), Pb/Ni(111), Ag/Cu(111), Pd/Pt(111), Ag/W(110)
(2) Determination of hydrogen adsorbed positions on fcc(111) crystals: H/Pt(111), H/Ni(111)
(3) Development of low energy atom scattering spectroscopy (electric circuits, softwares)
(4) RBS/channeling /ERD/NRA experiments for semiconductor and metal surfaces