Construction of Sensitive Surface‐Enhanced Raman Spectroscopy Chip with Sub‐Nanometer WO3−x Nanowire‐Based Superstructures for Multicomponent Detection. Issue 9 (7th August 2019)

• Record Type: Journal Article
• Authors: Ye, Yuting; Bai, Hua; Li, Mengchen; Tian, Zheng; Du, Ruifeng; Fan, Wenhao; Xi, Guangcheng
• Is Part Of: Advanced materials technologies. Volume 4:Issue 9(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-08-07
• Subjects: oxygen vacancies -- superstructures -- surface‐enhanced Raman spectroscopy -- surface plasma resonance -- ultrathin nanowires; Materials science -- Periodicals; Technological innovations -- Periodicals; Materials science; Technological innovations; Periodicals; 620.1105
• DOI: 10.1002/admt.201900282
• Languages: English
• ISSNs: 2365-709X

Abstract

Abstract: Exploring nonmetallic plasmonic materials is desirable yet challenging. For a long time, free‐plasmonic semiconductor is difficult to be used in high‐sensitive surface‐enhanced Raman spectrum (SERS) due to poor enhanced factor and high‐fluorescent background. Herein, it is reported that a nonmetallic plasmonic SERS chip, constructed with a highly ordered sub 1 nm WO3− x nanowire‐based superstructure, shows multicomponent detection capability. The densely arranged nanowires enable a strong localized surface plasmon resonance due to the high charge carriers' density induced by oxygen vacancies in the nanowires. In addition to the usual charge‐transfer enhancement, such nonmetallic WO3− x displays a unusual dramatic plasmon‐enhanced SERS sensing performance with a detection limit of 10 −10 m and a maximum Raman enhanced factor of 8.3 × 10 7 . The substrate fluorescence signals are efficiently quenched, making the SERS spectra more distinguishable. More importantly, the prepared WO3− x SERS chip through micro–nano printing realizes the separation and detection of multicomponents simultaneously. Abstract : A nonmetallic plasmonic surface‐enhanced Raman spectrum (SERS) chip, constructed with a highly ordered sub 1 nm WO3− x nanowire‐based superstructure, shows multicomponent detection capability. Such nonmetallic WO3− x displays a unusual dramatic plasmon‐enhanced SERS sensing performance with an ultrasensitive detection limit of 10 −10 m and a maximum Raman enhanced factor of 8.3 × 10 7 .