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Response Characteristics of Hydrogen Sensors Based on PMMA-Membrane-Coated Palladium Nanoparticle Films.
ACS Appl Mater Interfaces 2017; 9(32):27193-27201AA

Abstract

Coating a polymeric membrane for gas separation is a feasible approach to fabricate gas sensors with selectivity. In this study, poly(methyl methacrylate)-(PMMA-)membrane-coated palladium (Pd) nanoparticle (NP) films were fabricated for high-performance hydrogen (H2) gas sensing by carrying out gas-phase cluster deposition and PMMA spin coating. No changes were induced by the PMMA spin coating in the electrical transport and H2-sensing mechanisms of the Pd NP films. Measurements of H2 sensing demonstrated that the devices were capable of detecting H2 gas within the concentration range 0-10% at room temperature and showed high selectivity to H2 due to the filtration effect of the PMMA membrane layer. Despite the presence of the PMMA matrix, the lower detection limit of the sensor is less than 50 ppm. A series of PMMA membrane layers with different thicknesses were spin coated onto the surface of Pd NP films for the selective filtration of H2. It was found that the device sensing kinetics were strongly affected by the thickness of the PMMA layer, with the devices with thicker PMMA membrane layers showing a slower response to H2 gas. Three mechanisms slowing down the sensing kinetics of the devices were demonstrated to be present: diffusion of H2 gas in the PMMA matrix, nucleation and growth of the β phase in the α phase matrix of Pd hydride, and stress relaxation at the interface between Pd NPs and the PMMA matrix. The retardation effect caused by these three mechanisms on the sensing kinetics relied on the phase region of Pd hydride during the sensing reaction. Two simple strategies, minimizing the thickness of the PMMA membrane layer and reducing the size of the Pd NPs, were proposed to compensate for retardation of the sensing response.

Authors+Show Affiliations

Institute for Advanced Materials, Hubei Normal University , Huangshi 435002, P. R. China. National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.Nanoscale Physics Research Laboratory, School of Physics and Astronomy, University of Birmingham , Birmingham B15 2TT, United Kingdom. College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications , Nanjing 210023, P. R. China.National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.Institute for Advanced Materials, Hubei Normal University , Huangshi 435002, P. R. China.Institute for Advanced Materials, Hubei Normal University , Huangshi 435002, P. R. China.Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Normal University , Huangshi 435002, P. R. China.Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Normal University , Huangshi 435002, P. R. China.National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28742323

Citation

Chen, Minrui, et al. "Response Characteristics of Hydrogen Sensors Based On PMMA-Membrane-Coated Palladium Nanoparticle Films." ACS Applied Materials & Interfaces, vol. 9, no. 32, 2017, pp. 27193-27201.
Chen M, Mao P, Qin Y, et al. Response Characteristics of Hydrogen Sensors Based on PMMA-Membrane-Coated Palladium Nanoparticle Films. ACS Appl Mater Interfaces. 2017;9(32):27193-27201.
Chen, M., Mao, P., Qin, Y., Wang, J., Xie, B., Wang, X., ... Wang, G. (2017). Response Characteristics of Hydrogen Sensors Based on PMMA-Membrane-Coated Palladium Nanoparticle Films. ACS Applied Materials & Interfaces, 9(32), pp. 27193-27201. doi:10.1021/acsami.7b07641.
Chen M, et al. Response Characteristics of Hydrogen Sensors Based On PMMA-Membrane-Coated Palladium Nanoparticle Films. ACS Appl Mater Interfaces. 2017 Aug 16;9(32):27193-27201. PubMed PMID: 28742323.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Response Characteristics of Hydrogen Sensors Based on PMMA-Membrane-Coated Palladium Nanoparticle Films. AU - Chen,Minrui, AU - Mao,Peng, AU - Qin,Yuyuan, AU - Wang,Jue, AU - Xie,Bo, AU - Wang,Xiuzhang, AU - Han,Deyan, AU - Wang,Guo-Hong, AU - Song,Fengqi, AU - Han,Min, AU - Liu,Jun-Ming, AU - Wang,Guanghou, Y1 - 2017/08/04/ PY - 2017/7/26/pubmed PY - 2017/7/26/medline PY - 2017/7/26/entrez KW - H2-sensing kinetics KW - PMMA membrane layer KW - Pd nanoparticle films KW - electrical transport mechanism KW - hydrogen sensors SP - 27193 EP - 27201 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 9 IS - 32 N2 - Coating a polymeric membrane for gas separation is a feasible approach to fabricate gas sensors with selectivity. In this study, poly(methyl methacrylate)-(PMMA-)membrane-coated palladium (Pd) nanoparticle (NP) films were fabricated for high-performance hydrogen (H2) gas sensing by carrying out gas-phase cluster deposition and PMMA spin coating. No changes were induced by the PMMA spin coating in the electrical transport and H2-sensing mechanisms of the Pd NP films. Measurements of H2 sensing demonstrated that the devices were capable of detecting H2 gas within the concentration range 0-10% at room temperature and showed high selectivity to H2 due to the filtration effect of the PMMA membrane layer. Despite the presence of the PMMA matrix, the lower detection limit of the sensor is less than 50 ppm. A series of PMMA membrane layers with different thicknesses were spin coated onto the surface of Pd NP films for the selective filtration of H2. It was found that the device sensing kinetics were strongly affected by the thickness of the PMMA layer, with the devices with thicker PMMA membrane layers showing a slower response to H2 gas. Three mechanisms slowing down the sensing kinetics of the devices were demonstrated to be present: diffusion of H2 gas in the PMMA matrix, nucleation and growth of the β phase in the α phase matrix of Pd hydride, and stress relaxation at the interface between Pd NPs and the PMMA matrix. The retardation effect caused by these three mechanisms on the sensing kinetics relied on the phase region of Pd hydride during the sensing reaction. Two simple strategies, minimizing the thickness of the PMMA membrane layer and reducing the size of the Pd NPs, were proposed to compensate for retardation of the sensing response. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/28742323/Response_Characteristics_of_Hydrogen_Sensors_Based_on_PMMA_Membrane_Coated_Palladium_Nanoparticle_Films_ L2 - https://dx.doi.org/10.1021/acsami.7b07641 DB - PRIME DP - Unbound Medicine ER -