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Sensory Arrays of Covalently Functionalized Single‐Walled Carbon Nanotubes for Explosive Detection
Author(s) -
Schnorr Jan M.,
van der Zwaag Daan,
Walish Joseph J.,
Weizmann Yossi,
Swager Timothy M.
Publication year - 2013
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201300131
Subject(s) - materials science , carbon nanotube , thiourea , covalent bond , explosive material , nanotechnology , nitromethane , reproducibility , chemical engineering , organic chemistry , chromatography , chemistry , engineering
Chemiresistive sensor arrays for cyclohexanone and nitromethane are fabricated using single‐walled carbon nanotubes (SWCNTs) that are covalently functionalized with urea, thiourea, and squaramide containing selector units. Based on initial sensing results and 1 H NMR binding studies, the most promising selectors are chosen and further optimized. These optimized selectors are attached to SWCNTs and simultaneously tested in a sensor array. The sensors show a very high level of reproducibility between measurements with the same sensor and across different sensors of the same type. Furthermore, the sensors show promising long‐term stability, which renders them suitable for practical applications.