Lee, Kyu Seung Shim, Jae ho Lee, Joo Song Lee, Jaehyeon Moon, Hi Gyu Park, Young Jae Park, Donghee Son, Dong Ick 2024-01-19T13:00:29Z 2024-01-19T13:00:29Z 2022-01-26 2022-02 1226-086X https://pubs.kist.re.kr/handle/201004/115777 We demonstrated the sensing properties and adsorption mechanism of NO2 molecules of monolayer graphene and multilayer graphene encapsulated ZnO QDs for NO2 gas adsorption. The gas response value of ZnO-multilayer graphene (ZMLG) QDs was approximately 23 % and 7.2 and 25.5 times higher than that with ZnO-monolayer graphene (ZG) and ZnO QDs, respectively. The surface potential change of ZMLG QDs increased up to 14.25 times compared to ZnO QDs and 6.33 times increased compared to ZG QDs. We proposed an accurate adsorption mechanism for the improvement of the detection behavior that is occured by covering the graphene shells into ZnO QDs by the Brunauer？Emmett？Teller (BET), X-ray photoelectron spectroscopy (XPS), and SKPM measurement. These results are expected to increase the accuracy of gas sensor characteristic analysis. ？ 2021 The Korean Society of Industrial and Engineering Chemistry English Korean Society of Industrial Engineering Chemistry Adsorption behavior of NO2 molecules in ZnO-mono/multilayer graphene core-shell quantum dots for NO2 gas sensor Article 10.1016/j.jiec.2021.11.003 1 Journal of Industrial and Engineering Chemistry, v.106, pp.279 - 286 Journal of Industrial and Engineering Chemistry 106 279 286 N scie scopus kci 000746075400016 2-s2.0-85119578987 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article SENSING PROPERTIES NANOPARTICLES OXIDE PERFORMANCE NANORODS Core？shell QDs Gas sensor Graphene Surface potential ZnO QDs