Carbon nanodots: toward a comprehensive understanding of their photoluminescence.
We report the characterization of carbon nanodots (CNDs) synthesized under mild and controlled conditions, that is, in a microwave reactor. The CNDs thus synthesized exhibit homogeneous and narrowly dispersed optical properties. They are thus well suited as a testbed for studies of the photophysics of carbon-based nanoscopic emitters. In addition to steady-state investigations, time-correlated single-photon counting, fluorescence up-conversion, and transient pump probe absorption spectroscopy were used to elucidate the excited-state dynamics. Moreover, quenching the CND-based emission with electron donors or acceptors helped shed light on the nature of individual states. Density functional theory and semiempirical configuration-interaction calculations on model systems helped understand the fundamental structure-property relationships for this novel type of material.
Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg , Egerlandstr. 3, 91058 Erlangen, Germany.
Volker
V
Strauss
Johannes T
JT
Margraf
Christian
C
Dolle
Benjamin
B
Butz
Thomas J
TJ
Nacken
Johannes
J
Walter
Walter
W
Bauer
Wolfgang
W
Peukert
Erdmann
E
Spiecker
Timothy
T
Clark
Dirk M
DM
Guldi
D002244:Carbon / Q000737:chemistry*; D049449:Luminescence; D049329:Nanostructures / Q000737:chemistry*; D055668:Photochemical Processes; D011789:Quantum Theory
D002244:Carbon