title: Highly sensitive NH3 detection based on organic field-effect transistors with tris(pentafluorophenyl)borane as receptor.
abstract: We have increased organic field-effect transistor (OFET) NH(3) response using tris(pentafluorophenyl)borane (TPFB) as a receptor. OFETs with this additive could detect concentrations of 450 ppb v/v, with a limit of detection of 350 ppb, the highest sensitivity reported to date for semiconductor films; in comparison, when triphenylmethane (TPM) or triphenylborane (TFB) was used as an additive, no obvious improvement in the sensitivity was observed. These OFETs also showed considerable selectivity with respect to common organic vapors and stability toward storage. Furthermore, excellent memory of exposure was achieved by keeping the exposed devices in a sealed container stored at -30 °C, the first such capability demonstrated with OFETs.
authors.affiliation: Department of Materials Science and Engineering, Johns Hopkins University, 206 Maryland Hall, 3400 North Charles Street, Baltimore, Maryland 21218, USA.
authors.forename: Weiguo
authors.initials: W
authors.lastname: Huang
authors.forename: Kalpana
authors.initials: K
authors.lastname: Besar
authors.forename: Rachel
authors.initials: R
authors.lastname: LeCover
authors.forename: Ana María
authors.initials: AM
authors.lastname: Rule
authors.forename: Patrick N
authors.initials: PN
authors.lastname: Breysse
authors.forename: Howard E
authors.initials: HE
authors.lastname: Katz
mesh_terms: D000641:Ammonia / Q000032:analysis*; D001880:Boranes / Q000737:chemistry*; D006845:Hydrocarbons, Fluorinated / Q000737:chemistry*; D015394:Molecular Structure; D014320:Triphenylmethyl Compounds / Q000737:chemistry; D005466:Fluorocarbons
chemical_list: D000641:Ammonia; D001880:Boranes; D006845:Hydrocarbons, Fluorinated; D014320:Triphenylmethyl Compounds; C046945:triphenylmethane; C547049:tris(pentafluorophenyl)borane; D005466:Fluorocarbons