Journal article
Enhanced Selectivity of MXene Gas Sensors through Metal Ion Intercalation: In Situ X-ray Diffraction Study
ACS sensors, v 4(5), pp 1365-1372
24 May 2019
PMID: 31062965
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Gas molecules are known to interact with two-dimensional (2D) materials through surface adsorption where the adsorption-induced charge transfer governs the chemiresistive sensing of various gases. Recently, titanium carbide (Ti
C
T
) MXene emerged as a promising sensing channel showing the highest sensitivity among 2D materials and unique gas selectivity. However, unlike conventional 2D materials, MXenes show metallic conductivity and contain interlayer water, implying that gas molecules will likely interact in a more complex way than the typical charge transfer model. Therefore, it is important to understand the role of all factors that may influence gas sensing. Here, we studied the gas-induced interlayer swelling of Ti
C
T
MXene thin films and its influence on gas sensing performance. In situ X-ray diffraction was employed to simultaneously measure dynamic swelling behavior where Ti
C
T
MXene films displayed selective swelling toward ethanol vapor over CO
gas. Results show that the controlling sodium ion concentration in the interlayers is highly important in tuning the swelling behavior and gas sensing performance. The degree of swelling matched well with the gas response intensity, and the highest gas selectivity toward ethanol vapor was achieved for Ti
C
T
sensing channels treated with 0.3 mM NaOH, which also displayed the largest amount of swelling. Our results demonstrate that controlling the interlayer transport of Ti
C
T
MXene is essential for enhancing the selective sensing of gas molecules.
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Details
- Title
- Enhanced Selectivity of MXene Gas Sensors through Metal Ion Intercalation: In Situ X-ray Diffraction Study
- Creators
- Hyeong-Jun Koh - National Research Laboratory for Organic Optoelectronic Materials, Department of Chemical and Biomolecular Engineering (BK-21 Plus) , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141 , South KoreaSeon Joon Kim - Materials Architecturing Research Center , Korea Institute of Science and Technology (KIST) , Seoul 02792 , South KoreaKathleen Maleski - Department of Materials Science and Engineering, and A.J. Drexel Nanomaterials Institute , Drexel University , Philadelphia , Pennsylvania 19104 , United StatesSoo-Yeon Cho - National Research Laboratory for Organic Optoelectronic Materials, Department of Chemical and Biomolecular Engineering (BK-21 Plus) , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141 , South KoreaYong-Jae Kim - National Research Laboratory for Organic Optoelectronic Materials, Department of Chemical and Biomolecular Engineering (BK-21 Plus) , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141 , South KoreaChi Won Ahn - Global Nanotechnology Development Team , National Nanofab Center (NNFC) at Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141 , South KoreaYury Gogotsi - Department of Materials Science and Engineering, and A.J. Drexel Nanomaterials Institute , Drexel University , Philadelphia , Pennsylvania 19104 , United StatesHee-Tae Jung - KAIST Institute for Nanocentury , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141 , South Korea
- Publication Details
- ACS sensors, v 4(5), pp 1365-1372
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000469410100030
- Scopus ID
- 2-s2.0-85066050485
- Other Identifier
- 991014969864804721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Analytical
- Chemistry, Multidisciplinary
- Nanoscience & Nanotechnology