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Size-focusing results in highly photoluminescent sulfur quantum dots with a stable emission wavelength
Nanoscale ( IF 5.8 ) Pub Date : 2021-1-2 , DOI: 10.1039/d0nr07251f Yilun Sheng 1, 2, 3, 4, 5 , Zhongnan Huang 1, 2, 3, 4, 5 , Qi Zhong 1, 2, 3, 4, 5 , Haohua Deng 1, 2, 3, 4, 5 , Mingchun Lai 1, 2, 3, 4, 5 , Yu Yang 1, 2, 3, 4, 5 , Wei Chen 1, 2, 3, 4, 5 , Xinghua Xia 6, 7, 8, 9, 10 , Huaping Peng 1, 2, 3, 4, 5
Nanoscale ( IF 5.8 ) Pub Date : 2021-1-2 , DOI: 10.1039/d0nr07251f Yilun Sheng 1, 2, 3, 4, 5 , Zhongnan Huang 1, 2, 3, 4, 5 , Qi Zhong 1, 2, 3, 4, 5 , Haohua Deng 1, 2, 3, 4, 5 , Mingchun Lai 1, 2, 3, 4, 5 , Yu Yang 1, 2, 3, 4, 5 , Wei Chen 1, 2, 3, 4, 5 , Xinghua Xia 6, 7, 8, 9, 10 , Huaping Peng 1, 2, 3, 4, 5
Affiliation
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Sulfur quantum dots (SQDs) are a new kind of functional nanomaterial, but several challenges still exist in relation to their synthesis and application, such as low-yield and time-consuming synthetic methods, low photoluminescence quantum yields (PLQYs), and the non-selectivity of their detection mechanisms. Herein, we report the drastic enhancement of the fluorescence performance of water-soluble SQDs via the one-pot synthesis of size-focusing QDs using ultrasound microwave radiation. The synthetic period has been greatly shortened to 2 h via the present process. Notably, the proposed SQDs exhibit a highly stable emission wavelength with a record high PLQY of 58.6%. The mechanistic study indicates that size-focusing is a key factor relating to the proposed high-performance SQDs. As they also have robust stability, the proposed SQDs show a wide range of potential applications. Inspired by the characteristic properties of the SQDs and specific analytes, a simple SQD-based fluorescence sensing platform, via a redox-reaction-mediated mechanism, has been successfully developed for the rapid and selective detection of Ce(IV). In addition, this system has been effectively applied to some Ce(IV)-related biological assays, such as ascorbic acid (AA) analysis. This work is an important breakthrough in the SQD field, opening up avenues for solving the challenging problems relating to SQD-based probes, enriching the fundamental understanding of them, and greatly extending their applications, especially in biomedicine.
中文翻译：
尺寸聚焦导致具有稳定发射波长的高光致发光硫量子点
硫量子点（SQDs）是一种新型的功能纳米材料，但在合成和应用方面仍存在一些挑战，例如低产率，费时的合成方法，低光致发光量子产率（PLQYs）和非-其检测机制的选择性。在这里，我们报告通过使用超声波微波辐射一锅合成尺寸聚焦QDs来大幅提高水溶性SQDs的荧光性能。合成周期被大大缩短至2小时通过目前的过程。值得注意的是，建议的SQD表现出高度稳定的发射波长，PLQY达到了创纪录的58.6％。机理研究表明，以尺寸为中心是与建议的高性能SQD相关的关键因素。由于它们还具有鲁棒的稳定性，因此建议的SQD显示出广泛的潜在应用。受SQD和特定分析物的特性影响，通过氧化还原反应介导的机制，一种基于SQD的简单荧光传感平台已成功开发出用于快速选择性检测Ce（IV）的方法。此外，该系统已有效地应用于某些Ce（IV）相关的生物学分析，例如抗坏血酸（AA）分析。这项工作是SQD领域的一项重要突破，为解决基于SQD的探针所面临的挑战性问题提供了途径，丰富了对其的基本了解，并极大地扩展了其应用，尤其是在生物医学领域。
更新日期：2021-01-21
中文翻译：
尺寸聚焦导致具有稳定发射波长的高光致发光硫量子点
硫量子点（SQDs）是一种新型的功能纳米材料，但在合成和应用方面仍存在一些挑战，例如低产率，费时的合成方法，低光致发光量子产率（PLQYs）和非-其检测机制的选择性。在这里，我们报告通过使用超声波微波辐射一锅合成尺寸聚焦QDs来大幅提高水溶性SQDs的荧光性能。合成周期被大大缩短至2小时通过目前的过程。值得注意的是，建议的SQD表现出高度稳定的发射波长，PLQY达到了创纪录的58.6％。机理研究表明，以尺寸为中心是与建议的高性能SQD相关的关键因素。由于它们还具有鲁棒的稳定性，因此建议的SQD显示出广泛的潜在应用。受SQD和特定分析物的特性影响，通过氧化还原反应介导的机制，一种基于SQD的简单荧光传感平台已成功开发出用于快速选择性检测Ce（IV）的方法。此外，该系统已有效地应用于某些Ce（IV）相关的生物学分析，例如抗坏血酸（AA）分析。这项工作是SQD领域的一项重要突破，为解决基于SQD的探针所面临的挑战性问题提供了途径，丰富了对其的基本了解，并极大地扩展了其应用，尤其是在生物医学领域。
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