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Solvent‐Controlled Synthesis of Highly Luminescent Carbon Dots with a Wide Color Gamut and Narrowed Emission Peak Widths
Small ( IF 13.0 ) Pub Date : 2018-04-30 , DOI: 10.1002/smll.201800612
Hui Ding 1 , Ji-Shi Wei 2 , Peng Zhang 2 , Zi-Yuan Zhou 3 , Qing-Yu Gao 1 , Huan-Ming Xiong 2
Small ( IF 13.0 ) Pub Date : 2018-04-30 , DOI: 10.1002/smll.201800612
Hui Ding 1 , Ji-Shi Wei 2 , Peng Zhang 2 , Zi-Yuan Zhou 3 , Qing-Yu Gao 1 , Huan-Ming Xiong 2
Affiliation
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Carbon dots (CDs) have tremendous potential applications in bioimaging, biomedicine, and optoelectronics. By far, it is still difficult to produce photoluminescence (PL) tunable CDs with high quantum yield (QY) across the entire visible spectrum and narrow the emission peak widths of CDs close to those of typical quantum dots. In this work, a series of CDs with tunable emission from 443 to 745 nm, quantum yield within 13–54%, and narrowed full width at half maximum (FWHM) from 108 to 55 nm, are obtained by only adjusting the reaction solvents in a one‐pot solvothermal route. The distinct optical features of these CDs are based on their differences in the particle size, and the content of graphitic nitrogen and oxygen‐containing functional groups, which can be modulated by controlling the dehydration and carbonization processes during solvothermal reactions. Blue, green, yellow, red, and even pure white light emitting films (Commission Internationale de L'Eclairage (CIE)= 0.33, 0.33, QY = 39%) are prepared by dispersing one or three kinds of CDs into polyvinyl alcohol with appropriate ratios. The near‐infrared emissive CDs are excellent fluorescent probes for both in vitro and in vivo bioimaging because of their high QY in water, long‐term stability, and low cytotoxicity.
中文翻译：
溶剂控制的宽色域和窄发射峰宽的高发光碳点的合成
碳点（CD）在生物成像，生物医学和光电领域具有巨大的潜在应用。到目前为止，仍然很难在整个可见光谱范围内生产出具有高量子产率（QY）的光致发光（PL）可调CD，并使CD的发射峰宽度变窄，使其接近于典型的量子点。在这项工作中，仅通过调节反应溶剂的浓度，即可获得一系列CD，其可调谐发射范围为443至745 nm，量子产率在13–54％之间，半峰全宽（FWHM）从108至55 nm变窄。一锅溶剂热法。这些CD的独特光学特性是基于它们的粒径差异以及石墨氮和含氧官能团的含量，可以通过控制溶剂热反应过程中的脱水和碳化过程来调节。通过适当地将一种或三种CD分散到聚乙烯醇中来制备蓝色，绿色，黄色，红色甚至纯白色的发光膜（国际照明委员会（CIE）= 0.33、0.33，QY = 39％）。比率。近红外发射CD由于在水中的QY高，长期稳定性好且细胞毒性低，因此是用于体外和体内生物成像的出色荧光探针。
更新日期：2018-04-30
中文翻译：
溶剂控制的宽色域和窄发射峰宽的高发光碳点的合成
碳点（CD）在生物成像，生物医学和光电领域具有巨大的潜在应用。到目前为止，仍然很难在整个可见光谱范围内生产出具有高量子产率（QY）的光致发光（PL）可调CD，并使CD的发射峰宽度变窄，使其接近于典型的量子点。在这项工作中，仅通过调节反应溶剂的浓度，即可获得一系列CD，其可调谐发射范围为443至745 nm，量子产率在13–54％之间，半峰全宽（FWHM）从108至55 nm变窄。一锅溶剂热法。这些CD的独特光学特性是基于它们的粒径差异以及石墨氮和含氧官能团的含量，可以通过控制溶剂热反应过程中的脱水和碳化过程来调节。通过适当地将一种或三种CD分散到聚乙烯醇中来制备蓝色，绿色，黄色，红色甚至纯白色的发光膜（国际照明委员会（CIE）= 0.33、0.33，QY = 39％）。比率。近红外发射CD由于在水中的QY高，长期稳定性好且细胞毒性低，因此是用于体外和体内生物成像的出色荧光探针。
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