Abstract:
:Combining vapour sensors into arrays is an accepted compromise to mitigate poor selectivity of conventional sensors. Here we show individual nanofabricated sensors that not only selectively detect separate vapours in pristine conditions but also quantify these vapours in mixtures, and when blended with a variable moisture background. Our sensor design is inspired by the iridescent nanostructure and gradient surface chemistry of Morpho butterflies and involves physical and chemical design criteria. The physical design involves optical interference and diffraction on the fabricated periodic nanostructures and uses optical loss in the nanostructure to enhance the spectral diversity of reflectance. The chemical design uses spatially controlled nanostructure functionalization. Thus, while quantitation of analytes in the presence of variable backgrounds is challenging for most sensor arrays, we achieve this goal using individual multivariable sensors. These colorimetric sensors can be tuned for numerous vapour sensing scenarios in confined areas or as individual nodes for distributed monitoring.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Potyrailo RA,Bonam RK,Hartley JG,Starkey TA,Vukusic P,Vasudev M,Bunning T,Naik RR,Tang Z,Palacios MA,Larsen M,Le Tarte LA,Grande JC,Zhong S,Deng Tdoi
10.1038/ncomms8959subject
Has Abstractpub_date
2015-09-01 00:00:00pages
7959issn
2041-1723pii
ncomms8959journal_volume
6pub_type
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