{"title":"Toward 95.5% Efficient Red Emissive Carbon Dots: Oxidation State Enhancing Radiative Electron-Transition of Indole Fluorophore","authors":"Qing Zhang, Fengqing Wang, Junlan Liu, Ruoyu Wang, Yupengxue Ma, Fangfang Xia, Yuanyuan Qiu, Liangwei Zeng, Shaofeng Xu, Xiaoxia Zhong","doi":"10.1021/acs.nanolett.4c04367","DOIUrl":null,"url":null,"abstract":"Red fluorescence carbon dots (CDs) are promising for diverse applications and have attracted tremendous research interest. However, it is still challenging to achieve red fluorescence CDs with high fluorescence quantum yields (QYs > 50%). Herein, three kinds of red fluorescence CDs with QYs of 53.48, 85.21, and 59.18% are prepared. Benefiting from the oxidation induced by atmospheric-pressure O<sub>2</sub> plasma processing, 95.5% efficient red fluorescence emission is achieved. It is revealed that the indole based fluorophores act as the red-emitting photoluminescence center. The synergistic effect between the C–O–C structure and indole based fluorophores plays a key role in promoting the efficiency of radiative electron transition and controlling the red fluorescence QYs. Additionally, the CDs show promising prospects for <i>in vivo</i> bioimaging and low <i>in vivo</i> toxicity. This work shows a new way for achieving high-efficiency red fluorescence CDs, and it may guide the development of high-performance CDs for diverse applications.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":9.6000,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Letters","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acs.nanolett.4c04367","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Red fluorescence carbon dots (CDs) are promising for diverse applications and have attracted tremendous research interest. However, it is still challenging to achieve red fluorescence CDs with high fluorescence quantum yields (QYs > 50%). Herein, three kinds of red fluorescence CDs with QYs of 53.48, 85.21, and 59.18% are prepared. Benefiting from the oxidation induced by atmospheric-pressure O2 plasma processing, 95.5% efficient red fluorescence emission is achieved. It is revealed that the indole based fluorophores act as the red-emitting photoluminescence center. The synergistic effect between the C–O–C structure and indole based fluorophores plays a key role in promoting the efficiency of radiative electron transition and controlling the red fluorescence QYs. Additionally, the CDs show promising prospects for in vivo bioimaging and low in vivo toxicity. This work shows a new way for achieving high-efficiency red fluorescence CDs, and it may guide the development of high-performance CDs for diverse applications.
期刊介绍:
Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including:
- Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale
- Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies
- Modeling and simulation of synthetic, assembly, and interaction processes
- Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance
- Applications of nanoscale materials in living and environmental systems
Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.