Abstract
We present a rolled-up approach to form Ge microtubes and their array by rolling-up hybrid Ge/Cr nanomembranes, which is driven by the built-in stress in the deposited Cr layer. The study of Raman intensity as a function of the angle between the crystal-axis and the polarization-direction of the scattered light, i.e., polarized Raman measurement reveals that the strain state in Ge tube is uniaxial and tensile, and can reach a maximal value 1.0%. Both experimental observations and theoretical calculations suggest that the uniaxial-tensile strain residual in the rolled-up Ge tubes correlates with their tube diameters, which can be tuned by the thicknesses of the Cr layers deposited. Using the polarized Raman scattering spectroscopy, our study provides a comprehensive analysis of the strain state and evolution in self-rolled-up nano/micro-tubes.
Highlights
Qinglei Guo,[1] Miao Zhang,[1] Zhongying Xue,[1] Jing Zhang,[2] Gang Wang,[1] Da Chen,[1] Zhiqiang Mu,[1] Gaoshan Huang,[2] Yongfeng Mei,2,a Zengfeng Di,1,a and Xi Wang1 1State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, People’s Republic of China 2Department of Materials Science, Fudan University, Shanghai 200433, People’s Republic of China (Received 26 January 2015; accepted 3 March 2015; published online 10 March 2015)
Both experimental observations and theoretical calculations suggest that the uniaxial-tensile strain residual in the rolled-up Ge tubes correlates with their tube diameters, which can be tuned by the thicknesses of the Cr layers deposited
Using the polarized Raman scattering spectroscopy, our study provides a comprehensive analysis of the strain state and evolution in self-rolled-up nano/micro-tubes
Summary
Qinglei Guo,[1] Miao Zhang,[1] Zhongying Xue,[1] Jing Zhang,[2] Gang Wang,[1] Da Chen,[1] Zhiqiang Mu,[1] Gaoshan Huang,[2] Yongfeng Mei,2,a Zengfeng Di,1,a and Xi Wang1 1State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, People’s Republic of China 2Department of Materials Science, Fudan University, Shanghai 200433, People’s Republic of China (Received 26 January 2015; accepted 3 March 2015; published online 10 March 2015) Both experimental observations and theoretical calculations suggest that the uniaxial-tensile strain residual in the rolled-up Ge tubes correlates with their tube diameters, which can be tuned by the thicknesses of the Cr layers deposited.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
