title: Asymmetric AgPd-AuNR heterostructure with enhanced photothermal performance and SERS activity.
abstract: Most as-reported nanostructures through galvanic replacement reactions are still symmetric hollow structures, until now. Asymmetric structures fabricated through a galvanic replacement reaction have been rarely reported. However, asymmetric heterostructures can generally lead to new intriguing properties through asymmetric synergistic coupling. Here, we report a simple synthesis of an asymmetric one-ended AgPd bimetal on Au nanorods (AuNR) by combining a galvanic replacement reaction with an Ostwald ripening process. The morphological evolution from a nanodumbbell to a dandelion structure is thoroughly investigated. The unique asymmetric AgPd-AuNR heterostructures possess the required plasmonic performance and avoid strong damping caused by the poor plasmonic metal Pd, resulting in a superior photothermal heating performance and enhanced SERS sensitivity for in situ monitoring of a catalytic reaction compared with the symmetric counterparts.
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China. chengsi@suda.edu.cn.
authors.forename: Han
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China.
authors.forename: Zeke
authors.initials: Z
authors.lastname: Liu
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China. chengsi@suda.edu.cn.
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Kang
authors.affiliation: Testing & Analysis Center, Soochow University, Suzhou, Jiangsu 215123, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Guo
authors.affiliation: Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China.
authors.forename: Wanli
authors.initials: W
authors.lastname: Ma
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China. chengsi@suda.edu.cn.
authors.forename: Si
authors.initials: S
authors.lastname: Cheng