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    Manifold sensitivity improvement of swelling-based sensors

    Year: 2012

    Journal: Phys. Chem. Chem. Phys., 2012, 14 (16), 5558-5560, 20131009

    Authors: Hadi AlQahtani, Mohammad Alduraibi, Tim Richardson, Martin Grell

    Organizations: Department of Physics and Astronomy, University of Sheffield, Hounsfield Rd, Sheffield S3 7RH, UK; Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia

    The sensitivity of swelling-based gold core–organic shell nanoparticle vapor sensors is improved manifold by cooling sensors below ambient temperature. This is due to the reduced volatility of the analyte. Sensitivity to a particular analyte scales with temperature like that of analyte's saturated vapor pressure, thus allowing quantitative prediction of sensitivity enhancement. We believe our conclusions apply to all swelling-based sensors.