Carbon Nanodots: Toward a Comprehensive Understanding of Their Photoluminescence

详细信息    查看全文

• 作者：Volker Strauss ; Johannes T. Margraf ; Christian Dolle ; Benjamin Butz ; Thomas J. Nacken ; Johannes Walter ; Walter Bauer ; Wolfgang Peukert ; Erdmann Spiecker ; Timothy Clark ; Dirk M. Guldi
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：December 10, 2014
• 年：2014
• 卷：136
• 期：49
• 页码：17308-17316
• 全文大小：436K
• ISSN：1520-5126

文摘

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鈥損roperty relationships for this novel type of material.