Facile synthesis of Au@palladium oxide nano-sunflowers for ultrasensitive surface-enhanced Raman scattering analysis. (25th May 2022)

• Record Type: Journal Article
• Authors: Zhao, Chunxue; Yu, Haihong; Liu, Zhiming; Chen, Haolin; Ma, Xiao; Chen, Yiqiao; Liu, Ao; Zhong, Huiqing; Guo, Zhouyi
• Is Part Of: New journal of chemistry. Volume 46:Number 23(2022)
• Page Start: 11195
• Page End: 11201
• Publication Date: 2022-05-25
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj01578a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Au@palladium oxide nano-sunflowers are fabricated for ultrasensitive surface-enhanced Raman scattering analysis. Abstract : Metal–semiconductor nanocomposites have gained more and more attention as novel surface-enhanced Raman scattering (SERS) substrates due to the coupling Raman enhancement mechanism between the nanocomponents. Herein, Au@palladium oxide (Au@PdO x ) nanohybrids are firstly obtained from the oxidation of Pd hexagonal nanosheets in the presence of Au ions, where the whole process takes no more than 5 min without any additional redox agent. Au@PdO x shows a sunflower-like morphology with an average size of 180 nm consisting of an Au stamen and flake-like PdO x petals. An intense electric field distribution emerges around the Au nano-stamen which endows Au@PdO x with excellent SERS activity. A maximum Raman enhancement factor of 4.7 × 10 7 is achieved for methylene blue with good reproducibility and reliability.