title: Highly sensitive and selective gas sensor using hydrophilic and hydrophobic graphenes.
abstract: New hydrophilic 2D graphene oxide (GO) nanosheets with various oxygen functional groups were employed to maintain high sensitivity in highly unfavorable environments (extremely high humidity, strong acidic or basic). Novel one-headed polymer optical fiber sensor arrays using hydrophilic GO and hydrophobic reduced graphene oxide (rGO) were carefully designed, leading to the selective sensing of volatile organic gases for the first time. The two physically different surfaces of GO and rGO could provide the sensing ability to distinguish between tetrahydrofuran (THF) and dichloromethane (MC), respectively, which is the most challenging issue in the area of gas sensors. The eco-friendly physical properties of GO allowed for faster sensing and higher sensitivity when compared to previous results for rGO even under extreme environments of over 90% humidity, making it the best choice for an environmentally friendly gas sensor.
authors.affiliation: NCRI, Center for Smart Molecular Memory, Department of Chemistry, Sungkyunkwan University Suwon, Republic of Korea.
authors.forename: Surajit
authors.initials: S
authors.lastname: Some
authors.forename: Yang
authors.initials: Y
authors.lastname: Xu
authors.forename: Youngmin
authors.initials: Y
authors.lastname: Kim
authors.forename: Yeoheung
authors.initials: Y
authors.lastname: Yoon
authors.forename: Hongyi
authors.initials: H
authors.lastname: Qin
authors.forename: Atul
authors.initials: A
authors.lastname: Kulkarni
authors.forename: Taesung
authors.initials: T
authors.lastname: Kim
authors.forename: Hyoyoung
authors.initials: H
authors.lastname: Lee
mesh_terms: D015374:Biosensing Techniques; D005336:Fiber Optic Technology; D005663:Furans / Q000032:analysis; D005740:Gases / Q000032:analysis*; D006108:Graphite / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D008752:Methylene Chloride / Q000032:analysis; D049329:Nanostructures / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*
chemical_list: D005663:Furans; D005740:Gases; D010087:Oxides; D011108:Polymers; C018674:tetrahydrofuran; D008752:Methylene Chloride; D006108:Graphite