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RESEARCH PRODUCT
Core–Shell Nanorod Columnar Array Combined with Gold Nanoplate–Nanosphere Assemblies Enable Powerful In Situ SERS Detection of Bacteria
Aiwen ZhangNannan ZhangTibebe LemmaLi QiuJ. Jussi ToppariJin WangWeiqiang WangVesa P. HytönenHonghua Gesubject
In situMaterials scienceGram-positive bacteriata221Nanotechnology02 engineering and technologySpectrum Analysis Raman010402 general chemistry01 natural sciencessymbols.namesakeNanosensorGeneral Materials Scienceta318PlasmonNanotubesbiology3D PCASERSStaphylococcus xylosusGram-positive bacteria021001 nanoscience & nanotechnologybiology.organism_classificationListeria monocytogenesnanoarray0104 chemical sciencessymbolsNanorodGoldsuperstructure0210 nano-technologyRaman spectroscopyNanospheresBacteriadescription
Development of a label-free ultrasensitive nanosensor for detection of bacteria is presented. Sensitive assay for Gram-positive bacteria was achieved via electrostatic attraction-guided plasmonic bifacial superstructure/bacteria/columnar array assembled in one step. Dynamic optical hotspots were formed in the hybridized nanoassembly under wet-dry critical state amplifying efficiently the weak vibrational modes of three representative food-borne Gram-positive bacteria, that is, Staphylococcus xylosus, Listeria monocytogenes, and Enterococcus faecium. These three bacteria with highly analogous Raman spectra can be effectively differentiated through droplet wet-dry critical SERS approach combined with 3D PCA statistical analysis so that highly sensitive discrimination of bacterial species and samples containing mixtures of bacteria can be achieved.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-09-07 | ACS Applied Materials and Interfaces |