title: Robust cyclohexanone selective chemiresistors based on single-walled carbon nanotubes.
abstract: Functionalized single-walled carbon nanotube (SWCNT)-based chemiresistors are reported for a highly robust and sensitive gas sensor to selectively detect cyclohexanone, a target analyte for explosive detection. The trifunctional selector has three important properties: it noncovalently functionalizes SWCNTs with cofacial π-π interactions, it binds to cyclohexanone via hydrogen bond (mechanistic studies were investigated), and it improves the overall robustness of SWCNT-based chemiresistors (e.g., humidity and heat). Our sensors produced reversible and reproducible responses in less than 30 s to 10 ppm of cyclohexanone and displayed an average theoretical limit of detection (LOD) of 5 ppm.
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
authors.forename: Kelvin M
authors.initials: KM
authors.lastname: Frazier
authors.forename: Timothy M
authors.initials: TM
authors.lastname: Swager
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D003512:Cyclohexanones / Q000032:analysis* / Q000737:chemistry; D017097:Electric Impedance; D057230:Limit of Detection; D037742:Nanotubes, Carbon / Q000737:chemistry*
chemical_list: D003512:Cyclohexanones; D037742:Nanotubes, Carbon; C036468:cyclohexanone