JAIST Repository >
School of Materials Science >
Grants-in-aid for Scientific Research Papers >
FY 2017 >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/15397

Title: 超高真空TEM-AFMを用いた清浄な原子スケール金属接点力学特性の解明
Other Titles: A study of mechanical property of clean metal atomic contacts by UHV-TEM-AFM method
Authors: 大島, 義文
Authors(alternative): Oshima, Yoshifumi
Keywords: 透過型電子顕微鏡
Issue Date: 1-Jun-2018
Abstract: 水晶振動子の共振周波数シフトを用いた力計測を組み込んだTEM-AFMホルダーを設計・開発し、金ナノ接点のヤング率について直径依存性を明らかにした。この力計測法は、水晶振動子の高い共振周波数、および、高いバネ定数を活用することで、極めて小さな振幅でも原子スケールの力の傾きを計測できた。信号ノイズの対策を行うことで、約6N/mの分解能で力の傾き(つまり、等価バネ定数)を計測できる。また、振動子の振幅が約80pmと小さいため、力計測と同時に原子分解能像を得ることも可能であった。解析より、金ナノ接点のヤング率は、直径10nm以下になると徐々に低下することを定量的に明らかに出来た。:We designed and developed TEM-AFM holder, which can measure atomic-scale force using resonance frequency shift of quartz crystal resonator in order to clarify thedependence on Young's modulus of gold nano-contact. In this force measurement method, by utilizing the high resonance frequency and the high spring constant of the quartz resonator, it is possible to measure the atomic scale force gradient even with extremely small amplitude of the resonator. Byreducing signal noise, it is possible to measure the force gradient (that is, the equivalent spring constant) with a resolution of about 6 N/m. In addition, since the amplitude of the oscillator is as small as about 80 pm, it is possible to acquire atomic resolution image simultaneously with force measurement. From the analysis, it is possible to quantitatively clarify that the Young's modulus of the gold nano-contact gradually decreases as the diameter becomes 10 nm or less.
Description: 基盤研究(B)(一般)
Language: jpn
URI: http://hdl.handle.net/10119/15397
Appears in Collections:2017年度 (FY 2017)

Files in This Item:

File Description SizeFormat
15H03522seika.pdf324KbAdobe PDFView/Open

All items in DSpace are protected by copyright, with all rights reserved.


Contact : Library Information Section, Japan Advanced Institute of Science and Technology