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White Photoluminescent Ti3C2 MXene Quantum Dots with Two‐Photon Fluorescence
Advanced Science ( IF 14.3 ) Pub Date : 2019-03-10 , DOI: 10.1002/advs.201801470
Siyu Lu 1, 2 , Laizhi Sui 3 , Yuan Liu 1 , Xue Yong 1 , Guanjun Xiao 4 , Kaijun Yuan 3 , Zhongyi Liu 1 , Baozhong Liu 5 , Bo Zou 4 , Bai Yang 2
Affiliation  

A recently created class of inorganic 2D materials, MXenes, has become a subject of intensive research. Reducing their dimensionality from 2D to 0D quantum dots (QDs) could result in extremely useful properties and functions. However, this type of research is scarce, and the reported Ti3C2 MXene QDs (MQDs) have only shown blue fluorescence emission. This work demonstrates a facile, high‐output method for preparing bright white emitting Ti3C2 MQDs. The resulting product is two layers thick with a lateral dimension of 13.1 nm. Importantly, the as prepared Ti3C2 MQDs present strong two‐photon white fluorescence. Their fluorescence under high pressure is also investigated and it is found that the white emission is very stable and the pressure makes it possible to change from cool white emission to warm white emission. Hybrid nanocomposites are then fabricated by polymerizing Ti3C2 MQDs in polydimethylsiloxane (PDMS) solution, and the bright white emitting hybrid materials in white light‐emitting diodes are used. This work provides a facile and general approach to modulate various nanoscale MXene materials, and could further aid the wide development of applications for MXene materials in various optical‐related fields.

中文翻译:


具有双光子荧光的白色光致发光 Ti3C2 MXene 量子点



最近创建的一类无机 2D 材料 MXene 已成为深入研究的主题。将量子点 (QD) 的维数从 2D 降低到 0D 可能会产生极其有用的特性和功能。然而,此类研究很少,报道的Ti 3 C 2 MXene QD(MQD)仅显示蓝色荧光发射。这项工作展示了一种制备亮白光 Ti 3 C 2 MQD 的简便、高产量的方法。所得产品有两层厚,横向尺寸为 13.1 nm。重要的是,所制备的 Ti 3 C 2 MQD 呈现出强烈的双光子白色荧光。还研究了它们在高压下的荧光,发现白光发射非常稳定,并且压力使得可以从冷白光发射变为暖白光发射。然后通过在聚二甲基硅氧烷(PDMS)溶液中聚合Ti 3 C 2 MQD来制备混合纳米复合材料,并在白光发光二极管中使用明亮的白光发射混合材料。这项工作提供了一种简便且通用的方法来调制各种纳米级 MXene 材料,并可以进一步帮助 MXene 材料在各种光学相关领域的应用的广泛发展。
更新日期:2019-03-10
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