Strain Monitoring via Self-Assembled Quantum Dots

摘要：

　　Quantum dots (QDs) exhibit unique response of photoluminescence (PL) in response to mechanical deformation,which makes it possible to use QDs-epoxy resin composite in strain monitoring.In this work,gradient concentric rings consisting of QDs are prepared via the evaporation of chloroform droplets on pre-cast QDs/PMMA films,in which rigid spheres are used to pin the chloroform droplets and control the motion of the contact line of the chloroform droplets.Both the distance of adjacent rings (wavelength) and PL intensity are dependent on the size of rings and the thickness of the precast QDs/PMMA films.Using the gradient concentric rings consisting of QDs on the surface of a tensile bar of 304stainless steel,it is found that the distance of adjacent ring varies with tensile strain.This result demonstrates potential applications of self-assembled structures made of QDs in non-contact detection of mechanical deformation.

关键词： quantum dots self-assembly strain gauge wavelength photoluminescence intensity

作者: Shaofu Zhang Shaofeng Yin Weiling Luan Fuqian Yang

作者单位: Key Laboratory of Pressure Systems and Safety,Ministry of Education,East China University of Science Materials Program,Department of Chemical and Materials Engineering,University of Kentucky,Lexington,

会议类型: 国际会议

会议名称: 2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)

会议地点: 天津

会议语种:英文

页码: 493-497

在线出版日期: 2016-05-26（万方平台首次上网日期，不代表论文的发表时间）