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Green Synthesis of Carbon Dots toward Anti-Counterfeiting
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-10 , DOI: 10.1021/acssuschemeng.9b06267 Jiazhuang Guo 1 , He Li 1 , Luting Ling 1 , Ge Li 1 , Rui Cheng 1 , Xuan Lu 1 , An-Quan Xie 1 , Qing Li 1 , Cai-Feng Wang 1 , Su Chen 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-10 , DOI: 10.1021/acssuschemeng.9b06267 Jiazhuang Guo 1 , He Li 1 , Luting Ling 1 , Ge Li 1 , Rui Cheng 1 , Xuan Lu 1 , An-Quan Xie 1 , Qing Li 1 , Cai-Feng Wang 1 , Su Chen 1
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The synthesis of carbon dots (CDs) from green precursors has received considerable attention recently. However, most of the natural biomass-derived products without further surface treatment usually have quite low quantum yield (QY) varying in the range of 2–30%. Herein, we report the sustainable fabrication of highly fluorescent CDs from food waste, turtle shells, and demonstrate their applications in the fields of multisignal coding and anti-counterfeiting with a combination of colloidal photonic crystals (CPCs). We utilized turtle shells as precursors to synthesize fluorescent CDs via a simple pyrolysis method. The resultant CDs without further surface treatment have an absolute photoluminescence (PL) QY of 45% and high dispersibility in various solvents. Then, we realized collective optical properties with a combination of CDs and CPCs, including diffractive light abilities and fluorescence. CPC/CD bead codes with a structural color and fluorescence were prepared via a microfluidic device. CPC/CD patterned films with PL and angular dependence of structural colors were also constructed via a 3D microfluidic printing technique, which are useful for multisignal anti-counterfeiting and various optoelectronic applications.
中文翻译：
碳点防伪的绿色合成
由绿色前体合成碳点（CD）最近受到了相当大的关注。但是，大多数未经进一步表面处理的天然生物质衍生产品通常具有相当低的量子产率（QY），变化范围在2％至30％之间。在这里，我们报告了从食物垃圾，龟壳中可持续制造高荧光CD的情况，并结合胶体光子晶体（CPC）展示了它们在多信号编码和防伪领域中的应用。我们利用龟壳作为前体通过简单的热解方法合成荧光CD。未经进一步表面处理的所得CD的绝对光致发光（PL）QY为45％，并且在各种溶剂中的分散性很高。然后，我们结合CD和CPC来实现集体的光学特性，包括衍射光能力和荧光。通过微流体装置制备具有结构颜色和荧光的CPC / CD珠代码。还通过3D微流体印刷技术构建了具有PL和结构颜色的角度依赖性的CPC / CD图案化膜，该膜可用于多信号防伪和各种光电应用。
更新日期：2020-01-10
中文翻译：
碳点防伪的绿色合成
由绿色前体合成碳点（CD）最近受到了相当大的关注。但是，大多数未经进一步表面处理的天然生物质衍生产品通常具有相当低的量子产率（QY），变化范围在2％至30％之间。在这里，我们报告了从食物垃圾，龟壳中可持续制造高荧光CD的情况，并结合胶体光子晶体（CPC）展示了它们在多信号编码和防伪领域中的应用。我们利用龟壳作为前体通过简单的热解方法合成荧光CD。未经进一步表面处理的所得CD的绝对光致发光（PL）QY为45％，并且在各种溶剂中的分散性很高。然后，我们结合CD和CPC来实现集体的光学特性，包括衍射光能力和荧光。通过微流体装置制备具有结构颜色和荧光的CPC / CD珠代码。还通过3D微流体印刷技术构建了具有PL和结构颜色的角度依赖性的CPC / CD图案化膜，该膜可用于多信号防伪和各种光电应用。
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