NDLI: Plasmon-free SERS detection of environmental CO<sub>2</sub> on TiO<sub>2</sub> surfaces

Content Provider	Royal Society of Chemistry (RSC)
Author	Carletti, Luca Angelis, Costantino De Alessandri, Ivano Bontempi, Nicolò
Copyright Year	2016
Abstract	SiO2/TiO2 core/shell beads (T-rex) were designed, fabricated and tested for Raman detection of environmental CO2 under real-working conditions, as those encountered, for example, in solar-to-fuel conversion reactions. The exploitation of light trapping and morphology dependent resonances was crucial for extending the limit of detection of CO2 adsorbed on TiO2 surfaces. T-rex beads allowed for achieving surface enhanced Raman scattering (SERS) without using plasmonic metals showing high-efficiency, fast response and reproducibility in CO2 detection in both air and solvents. The dependence of SERS activity on Mie-type resonances was investigated through a systematic comparison of experimental data and numerical simulations, demonstrating that T-rex beads can be tailored for the detection of gaseous environmental pollutants on the basis of simple, Mie-scattering based calculations. Three-dimensional T-rex colloidal crystals were also successfully tested in precise, in situ, real time detection of CO2 as a function of different temperature-sweep cycles.
Starting Page	3226
Ending Page	3231
Page Count	6
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	8
Issue Number	6
Journal	Nanoscale
DOI	10.1039/c5nr08380j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Surface-enhanced Raman spectroscopy Raman Correlation and dependence
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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