Femtosecond transient absorption spectroscopic study on the electronic structures of graphene oxides, graphene oxide nanoribbons and graphene quantum dots
Source abstract
Abstract
Transient features of graphene oxide (GO), graphene oxide nanoribbon (GOR) and graphene quantum dot (GQD) have been investigated by femtosecond transient absorption (TA) spectroscopy. It is found that for pristine GO and HNO3-/NaOH-treated GO, a hybrid sp2/sp3 state at about 430 nm (∼2.88 eV) always appears. However, this hybrid state becomes less apparent in GOR, and completely disappears in GQD. It indicates that there are absolutely different electronic structures in GO, GOR and GQD. Furthermore, compared with pristine GO and GQD, GOR presents a faster decay for carrier dynamics. This could be attributed to the relatively weak interaction between the sp2 domains and sp3 matrix in GOR, which facilitates the carrier recombination.
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Research context
OpenAlex topics: Graphene research and applications · Graphene and Nanomaterials Applications · Carbon and Quantum Dots Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Jilin University
Tsinghua University
Funding
National Natural Science Foundation of China · National Key Research and Development Program of China
References (49)
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