Journal
NANO LETTERS
Volume 15, Issue 8, Pages 5585-5589Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b02240
Keywords
van Hove singularity; twisted bilayer graphene; chemical modification; enhanced photochemical reactivity
Categories
Funding
- National Natural Science Foundation of China [51432002, 21222303, 21473001]
- Ministry of Science and Technology of China [2014CB932500, 2013CB932603, 2012CB933404, 2011CB933003, 2011CB921904]
- Directorate For Engineering [1542152] Funding Source: National Science Foundation
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Twisted bilayer graphene (tBLG) exhibits van Hove singularities (VHSs) in the density of states that can be tuned by changing the twist angle (theta), sparking various novel physical phenomena. Much effort has been devoted to investigate the theta-dependent physical properties of tBLG. Yet, the chemical properties of tBLG with VHSs, especially the chemical reactivity, remain unexplored. Here we report the first systematic study on the chemistry of tBLG through the photochemical reaction between graphene and benzoyl peroxide. Twisted bilayer graphene exhibits 0-dependent reactivity, and remarkably enhanced reactivity is obtained when the energy of incident laser matches with the energy chemical reactivity derived from VHS is highly beneficial for the controllable chemical modification of tBLG as well as the development of tBLG based devices.
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