Green and simple route toward boron doped carbon dots with significantly enhanced non-linear optical properties
Green and simple route toward boron doped carbon dots with significantly enhanced non-linear optical properties
复制标题
DOI：
10.1016/j.carbon.2014.11.032
复制
发表时间：
2015-03-01
期刊：
影响因子：
10.9
通讯作者：
Couris, Stelios
中科院分区：
文献类型：
--
作者：
Bourlinos, Athanasios B.;Trivizas, Georgios;Couris, Stelios
微波加热柠檬酸、硼酸和尿素的水溶液可得到超细尺寸（2-6 nm）和准球形的硼掺杂碳点（C-dots）。新的点可自由分散在水中，提供稳定、光学透明的橄榄绿色分散体。研究了点的光致发光和非线性光学响应的光学特性。掺硼碳点表现出吸收发射特性，与传统量子点的光学特性非常相似，在紫外激发下具有强烈的蓝色荧光。重要的是，我们首次证明，与未掺杂的碳点相比，碳点中的硼掺杂会导致非线性光学响应的显着增强。这一结果与先前的研究报告一致，该研究报告了对硼掺杂硅纳米晶体的非线性光学特性的类似影响。 (C) 2014 Elsevier Ltd. 保留所有权利。
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. (C) 2014 Elsevier Ltd. All rights reserved.