Please use this identifier to cite or link to this item: https://doi.org/10.1021/acssensors.0c00495
Title: Chip-Level Integration of Covalent Organic Frameworks for Trace Benzene Sensing.
Authors: YUAN HONGYE 
Li, Nanxi
Linghu, Jiajun
DONG JINQIAO 
WANG YUXIANG 
AVISHEK KARMAKAR 
Yuan, Jiaren
Li, Mengsha
Buenconsejo, Pio John S
LIU GUOLIANG 
Cai, Hong
Pennycook,Stephen John 
Singh, Navab
Zhao Dan 
Keywords: benzene detection
capacitive gas sensing
covalent organic frameworks
in situ film growth
sub-ppm level
Issue Date: 22-May-2020
Publisher: American Chemical Society (ACS)
Citation: YUAN HONGYE, Li, Nanxi, Linghu, Jiajun, DONG JINQIAO, WANG YUXIANG, AVISHEK KARMAKAR, Yuan, Jiaren, Li, Mengsha, Buenconsejo, Pio John S, LIU GUOLIANG, Cai, Hong, Pennycook,Stephen John, Singh, Navab, Zhao Dan (2020-05-22). Chip-Level Integration of Covalent Organic Frameworks for Trace Benzene Sensing.. ACS Sens 5 (5) : 1474-1481. ScholarBank@NUS Repository. https://doi.org/10.1021/acssensors.0c00495
Abstract: State-of-the-art chemical sensors based on covalent organic frameworks (COFs) are restricted to the transduction mechanism relying on luminescence quenching and/or enhancement. Herein, we present an alternative methodology via a combination of in situ-grown COF films with interdigitated electrodes utilized for capacitive benzene detection. The resultant COF-based sensors exhibit highly sensitive and selective detection at room temperature toward benzene vapor over carbon dioxide, methane, and propane. Their benzene detection limit can reach 340 ppb, slightly inferior to those of the metal oxide semiconductor-based sensors, but with reduced power consumption and increased selectivity. Such a sensing behavior can be attributed to the large dielectric constant of the benzene molecule, distinctive adsorptivity of the chosen COF toward benzene, and structural distortion induced by the custom-made interaction pair, which is corroborated by sorption measurements and density functional theory (DFT) calculations. This study provides new perspectives for fabricating COF-based sensors with specific functionality targeted for selective gas detection.
Source Title: ACS Sens
URI: https://scholarbank.nus.edu.sg/handle/10635/169624
ISSN: 2379-3694
DOI: 10.1021/acssensors.0c00495
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