Crack monitoring in shape memory alloy/cement composite materials using water-dispersed quantum dots. (10th August 2018)

• Record Type: Journal Article
• Authors: Kim, Jaehwan; Han, Chang-Yeol; Kim, Eui-Hyun; Bae, Seung-Muk; Hwang, Heesu; Yang, Heesun; Choi, Eunsoo; Hwang, Jin-Ha
• Is Part Of: Smart materials and structures. Volume 27:Number 9(2018:Sep.)
• Publication Date: 2018-08-10
• Subjects: crack monitoring -- quantum dot -- luminescence -- aqueous solution -- UV illumination; Smart materials -- Periodicals; Strucural design -- Periodicals; 620.11
• DOI: 10.1088/1361-665X/aad5f6
• Languages: English
• ISSNs: 0964-1726

Abstract

Abstract: Highly luminescent, heterostructurally engineered CdZnSeS@ZnS quantum dot (QD) materials are surface-modified through ligand exchange from hydrophobicity to hydrophilicity, by which the QD surface becomes compatible with the cementitious materials fabricated from a water-based constituent. Facile structural health monitoring tools are proposed based on aqueous QD material applied to mechanical defects encountered in cement-based materials and similar massive infrastructure. Unlike the pre-existing materials approach, the current work employed water as the dispersion medium, which is compatible with the pre-existing structural environment, thus facilitating infiltration of the aqueous solution into the porous or cracked cement-based systems. The aqueous QD solutions are proven to be suitable for crack monitoring in cement-based materials.