Green growth of mixed valence manganese oxides on quasi-freestanding bilayer epitaxial graphene-silicon carbide substrates
Nanostructured manganese oxides (MnOx) have shown incredible promise in constructing next-generation energy storage and catalytic systems. However, it has proven challenging to integrate with other low-dimensional materials due to harsh deposition conditions and poor structural stability. Here, we r...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Materials Today Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590049824000043 |
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| author | Michael Pedowitz Daniel Lewis Jennifer DeMell Daniel J. Pennachio Jenifer R. Hajzus Rachael Myers-Ward Soaram Kim Kevin M. Daniels |
| author_facet | Michael Pedowitz Daniel Lewis Jennifer DeMell Daniel J. Pennachio Jenifer R. Hajzus Rachael Myers-Ward Soaram Kim Kevin M. Daniels |
| author_sort | Michael Pedowitz |
| collection | DOAJ |
| description | Nanostructured manganese oxides (MnOx) have shown incredible promise in constructing next-generation energy storage and catalytic systems. However, it has proven challenging to integrate with other low-dimensional materials due to harsh deposition conditions and poor structural stability. Here, we report the deposition of layered manganese dioxide (δ-MnO2) on bilayer epitaxial graphene (QEG) using a simple three-step electrochemical process involving no harsh chemicals. Using this process we can synthesize a 50 nm thick H–MnO2 film in 1.25s. This synthetic birnessite is inherently water-stabilized, the first reported in the literature. We also confirm that this process does not cause structural damage to the QEG, as evidenced by the lack of D peak formation. This QEG heterostructure enhanced MnO2's redox active gas sensing, enabling room temperature detection of NH3 and NO2. We also report on transforming this δ-MnO2 to other MnOx compounds, Mn2O3 and Mn3O4, via mild annealing. This is confirmed by Raman spectroscopy of the films, which also confirms limited damage to the QEG substrate. To our knowledge, this is the first synthesis of Mn2O3 and Mn3O4 on pristine graphene substrates. Both methods demonstrate the potential of depositing and transforming multifunctional oxides on single-crystal graphene using QEG substrates, allowing for the formation of nanostructured heterostructures previously unseen. Additionally, the electrochemical nature of the deposition presents the ability to scale the process to the QEG wafer and adjust the solution to produce other powerful multifunctional oxides. |
| first_indexed | 2024-03-08T10:29:19Z |
| format | Article |
| id | doaj.art-4a0b451a45104470860719eb4a75041d |
| institution | Directory Open Access Journal |
| issn | 2590-0498 |
| language | English |
| last_indexed | 2024-04-24T22:56:57Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials Today Advances |
| spelling | doaj.art-4a0b451a45104470860719eb4a75041d2024-03-18T04:34:30ZengElsevierMaterials Today Advances2590-04982024-03-0121100467Green growth of mixed valence manganese oxides on quasi-freestanding bilayer epitaxial graphene-silicon carbide substratesMichael Pedowitz0Daniel Lewis1Jennifer DeMell2Daniel J. Pennachio3Jenifer R. Hajzus4Rachael Myers-Ward5Soaram Kim6Kevin M. Daniels7Department of Electrical and Computer Engineering, University of Maryland, College Park, MD, USA; Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD, USA; Corresponding author. Department of Electrical and Computer Engineering, University of Maryland, College Park, MD, USADepartment of Electrical and Computer Engineering, University of Maryland, College Park, MD, USA; Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD, USADepartment of Electrical and Computer Engineering, University of Maryland, College Park, MD, USA; Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD, USA; Laboratory for Physical Sciences, College Park, MD, USAUS Naval Research Laboratory, Washington DC, USAUS Naval Research Laboratory, Washington DC, USAUS Naval Research Laboratory, Washington DC, USADepartment of Electrical and Computer Engineering, University of Maryland, College Park, MD, USA; Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD, USA; Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX, USA 77843; Center for Remote Health Technologies and Systems, Texas A&M University, College Station, TX, USA 77843Department of Electrical and Computer Engineering, University of Maryland, College Park, MD, USA; Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD, USA; Corresponding author. Department of Electrical and Computer Engineering, University of Maryland, College Park, MD, USANanostructured manganese oxides (MnOx) have shown incredible promise in constructing next-generation energy storage and catalytic systems. However, it has proven challenging to integrate with other low-dimensional materials due to harsh deposition conditions and poor structural stability. Here, we report the deposition of layered manganese dioxide (δ-MnO2) on bilayer epitaxial graphene (QEG) using a simple three-step electrochemical process involving no harsh chemicals. Using this process we can synthesize a 50 nm thick H–MnO2 film in 1.25s. This synthetic birnessite is inherently water-stabilized, the first reported in the literature. We also confirm that this process does not cause structural damage to the QEG, as evidenced by the lack of D peak formation. This QEG heterostructure enhanced MnO2's redox active gas sensing, enabling room temperature detection of NH3 and NO2. We also report on transforming this δ-MnO2 to other MnOx compounds, Mn2O3 and Mn3O4, via mild annealing. This is confirmed by Raman spectroscopy of the films, which also confirms limited damage to the QEG substrate. To our knowledge, this is the first synthesis of Mn2O3 and Mn3O4 on pristine graphene substrates. Both methods demonstrate the potential of depositing and transforming multifunctional oxides on single-crystal graphene using QEG substrates, allowing for the formation of nanostructured heterostructures previously unseen. Additionally, the electrochemical nature of the deposition presents the ability to scale the process to the QEG wafer and adjust the solution to produce other powerful multifunctional oxides.http://www.sciencedirect.com/science/article/pii/S2590049824000043ElectrodepositionGrapheneEpitaxial transition metal oxidesδ-MnO2TransformationLow defect |
| spellingShingle | Michael Pedowitz Daniel Lewis Jennifer DeMell Daniel J. Pennachio Jenifer R. Hajzus Rachael Myers-Ward Soaram Kim Kevin M. Daniels Green growth of mixed valence manganese oxides on quasi-freestanding bilayer epitaxial graphene-silicon carbide substrates Materials Today Advances Electrodeposition Graphene Epitaxial transition metal oxides δ-MnO2 Transformation Low defect |
| title | Green growth of mixed valence manganese oxides on quasi-freestanding bilayer epitaxial graphene-silicon carbide substrates |
| title_full | Green growth of mixed valence manganese oxides on quasi-freestanding bilayer epitaxial graphene-silicon carbide substrates |
| title_fullStr | Green growth of mixed valence manganese oxides on quasi-freestanding bilayer epitaxial graphene-silicon carbide substrates |
| title_full_unstemmed | Green growth of mixed valence manganese oxides on quasi-freestanding bilayer epitaxial graphene-silicon carbide substrates |
| title_short | Green growth of mixed valence manganese oxides on quasi-freestanding bilayer epitaxial graphene-silicon carbide substrates |
| title_sort | green growth of mixed valence manganese oxides on quasi freestanding bilayer epitaxial graphene silicon carbide substrates |
| topic | Electrodeposition Graphene Epitaxial transition metal oxides δ-MnO2 Transformation Low defect |
| url | http://www.sciencedirect.com/science/article/pii/S2590049824000043 |
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