title: Detection of Volatile Organic Compounds by Self-assembled Monolayer Coated Sensor Array with Concentration-independent Fingerprints.
abstract: In this paper, we have modeled and analyzed affinities and kinetics of volatile organic compounds (VOCs) adsorption (and desorption) on various surface chemical groups using multiple self-assembled monolayers (SAMs) functionalized film bulk acoustic resonator (FBAR) array. The high-frequency and micro-scale resonator provides improved sensitivity in the detections of VOCs at trace levels. With the study of affinities and kinetics, three concentration-independent intrinsic parameters (monolayer adsorption capacity, adsorption energy constant and desorption rate) of gas-surface interactions are obtained to contribute to a multi-parameter fingerprint library of VOC analytes. Effects of functional group's properties on gas-surface interactions are also discussed. The proposed sensor array with concentration-independent fingerprint library shows potential as a portable electronic nose (e-nose) system for VOCs discrimination and gas-sensitive materials selections.
authors.affiliation: State Key Laboratory of Precision Measuring Technology &Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Chang
authors.affiliation: State Key Laboratory of Precision Measuring Technology &Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China.
authors.forename: Ning
authors.initials: N
authors.lastname: Tang
authors.affiliation: State Key Laboratory of Precision Measuring Technology &Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China.
authors.forename: Hemi
authors.initials: H
authors.lastname: Qu
authors.affiliation: State Key Laboratory of Precision Measuring Technology &Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Precision Measuring Technology &Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China.
authors.forename: Daihua
authors.initials: D
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Precision Measuring Technology &Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Precision Measuring Technology &Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Pang
authors.affiliation: State Key Laboratory of Precision Measuring Technology &Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China.
authors.forename: Xuexin
authors.initials: X
authors.lastname: Duan