title: Transparent Raman-enhancing substrates for microbiological monitoring and in situ pollutant detection.
abstract: Opaque Raman-enhancing substrates made of Ag nanoparticles on incompletely oxidized aluminum templates have been rendered transparent by an ion-drift process to complete the oxidation. The result shows that the transparent substrates exhibit high/uniform surface-enhanced Raman scattering (SERS) capability and good optical transmissivity, allowing for concurrent SERS characterization and high contrast transmission-mode optical imaging of S. aureus bacteria. We also demonstrate that the transparent substrates can used in conjunction with optical fibers as SERS sensors for in situ detection of malachite green down to 10(-9) M.
authors.affiliation: Department of Physics, National Taiwan University, Taipei, Taiwan.
authors.forename: Huai-Hsien
authors.initials: HH
authors.lastname: Wang
authors.forename: Tian-You
authors.initials: TY
authors.lastname: Cheng
authors.forename: Pradeep
authors.initials: P
authors.lastname: Sharma
authors.forename: Fang-Yi
authors.initials: FY
authors.lastname: Chiang
authors.forename: Shirley Wen-Yu
authors.initials: SW
authors.lastname: Chiu
authors.forename: Juen-Kai
authors.initials: JK
authors.lastname: Wang
authors.forename: Yuh-Lin
authors.initials: YL
authors.lastname: Wang
mesh_terms: D000535:Aluminum / Q000737:chemistry; D001431:Bacteriological Techniques / Q000295:instrumentation; D004867:Equipment Design; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*; D013211:Staphylococcus aureus / Q000302:isolation & purification*
chemical_list: D012834:Silver; D000535:Aluminum