Selective sensing of vapors of similar dielectric constants using peptide-capped gold nanoparticles on individual multivariable transducers

文献情報

出版日 2013-04-17

DOI 10.1039/C3AN00088E

インパクトファクター 4.616

著者

Nandini Nagraj, Joseph M. Slocik, David M. Phillips, Nancy Kelley-Loughnane, Rajesh R. Naik, Radislav A. Potyrailo

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要旨

Peptide-capped AYSSGAPPMPPF gold nanoparticles were demonstrated for highly selective chemical vapor sensing using individual multivariable inductor–capacitor–resistor (LCR) resonators. Their multivariable response was achieved by measuring their resonance impedance spectra followed by multivariate spectral analysis. Detection of model toxic vapors and chemical agent simulants, such as acetonitrile, dichloromethane and methyl salicylate, was performed. Dichloromethane (dielectric constant εr = 9.1) and methyl salicylate (εr = 9.0) were discriminated using a single sensor. These sensing materials coupled to multivariable transducers can provide numerous opportunities for tailoring the vapor response selectivity based on the diversity of the amino acid composition of the peptides, and by the modulation of the nature of peptide–nanoparticle interactions through designed combinations of hydrophobic and hydrophilic amino acids.

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CiteScore: 7.8

自己引用率: 5.6%

年間論文数: 653

Analyst publishes analytical and bioanalytical research that reports premier fundamental discoveries and inventions, and the applications of those discoveries, unconfined by traditional discipline barriers.

Selective sensing of vapors of similar dielectric constants using peptide-capped gold nanoparticles on individual multivariable transducers

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