硼
量子点
材料科学
兴奋剂
光致发光
碳纤维
吸收(声学)
硼酸
纳米技术
水溶液
荧光
光电子学
光学
化学
复合材料
复合数
有机化学
物理
作者
Athanasios B. Bourlinos,Georgios Trivizas,Michael A. Karakassides,Maria Baikousi,Αntonios Kouloumpis,Dimitrios Gournis,Aristides Bakandritsos,Kateřina Holá,Ondřej Kozák,Radek Zbořil,C. Fourment,Panagiotis Aloukos,Stelios Couris
出处
期刊:Carbon
[Elsevier]
日期:2015-03-01
卷期号:83: 173-179
被引量:289
标识
DOI:10.1016/j.carbon.2014.11.032
摘要
Microwave heating of an aqueous solution of citric acid, boric acid and urea affords boron-doped carbon dots (C-dots) with ultrafine size (2–6 nm) and quasi-spherical shape. The new dots are freely dispersible in water providing stable, optically transparent dispersions with olive-green color. The optical properties of the dots were studied in respect to their photoluminescence and nonlinear optical response. Boron-doped C-dots exhibit absorption–emission features that strongly resemble the optical properties of conventional quantum dots with a strong blue fluorescence under UV excitation. Importantly, we demonstrate for the first time that boron doping in C-dots causes a significant enhancement of the nonlinear optical response compared to un-doped carbon dots. This result is in line with previous studies reporting a similar effect on the non-linear optical properties of boron-doped silicon nanocrystals.
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