Fabrication of BP2T functionalized graphene via non-covalent π-π stacking interactions for enhanced ammonia detection
| Autor: | Anton Grigoriev, Hu Li, Yuanyuan Han, Tianbo Duan, Klaus Leifer, Raffaello Papadakis, Rajeev Ahuja, Omer Sher |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Fysikalisk kemi
Fabrication Materials science Graphene General Chemical Engineering Binding energy Stacking Langmuir adsorption model Materialkemi Nanotechnology General Chemistry Physical Chemistry law.invention symbols.namesake Ammonia chemistry.chemical_compound chemistry law symbols Materials Chemistry Surface modification Molecule |
| Popis: | Graphene has stimulated great enthusiasm in a variety of fields, while its chemically inert surface still remains challenging for functionalization towards various applications. Herein, we report an approach to fabricate non-covalently functionalized graphene by employing pi-pi stacking interactions, which has potentialities for enhanced ammonia detection. 5,5 '-Di(4-biphenylyl)-2,2 '-bithiophene (BP2T) molecules are used in our work for the non-covalent functionalization through strong pi-pi interactions of aromatic structures with graphene, and systematic investigations by employing various spectroscopic and microscopic characterization methods confirm the successful non-covalent attachment of the BP2T on the top of graphene. From our gas sensing experiments, the BP2T functionalized graphene is promising for ammonia sensing with a 3-fold higher sensitivity comparing to that of the pristine graphene, which is mainly attributed to the enhanced binding energy between the ammonia and BP2T molecules derived by employing the Langmuir isotherm model. This work provides essential evidence of the pi-pi stacking interactions between graphene and aromatic molecules, and the reported approach also has the potential to be widely employed in a variety of graphene functionalizations for chemical detection. Hu Li and Tianbo Duan share first authorship |
| Databáze: | OpenAIRE |
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