期刊
JOURNAL OF OPTICS-INDIA
卷 48, 期 2, 页码 288-293出版社
SPRINGER INDIA
DOI: 10.1007/s12596-019-00529-x
关键词
Carbon quantum dots; Optical materials; Tunable light emission
类别
资金
- University Grants Commission (Govt. of India) [F1-17.1/2016-17/MANF-2015-17-KER-67915]
- Science Engineering Research Board [EMR/2017/000178]
- KSCSTE [607/2015/KSCSTE]
- Department of Science and Technology, Government of Kerala [SR/FST/college 202/2014]
Carbon quantum dots (CQDs) with an approximate size of 8 nm were prepared by a simple and costeffective green technique-pyrolysis of cotton. Synthesized CQDs exhibit broad fluorescence covering almost blue and green light wavelengths. They show low cytotoxicity and good photostability. A simple mixing of rhodamine 6G chloride with highly fluorescent carbon dots in water led to aggregation of dye molecules on carbon dot surface. Controlling the emission of free rhodamine 6G dye with that of the resultant carbon dot-aggregated rhodamine 6G composite resulted in efficient white light emission with the CIE coordinate (0.305, 0.313). Suitable mixture of blue-light-emitting CQD in aqueous solution and rhodamine 6G dye can potentially be applied for tunable white light emission.
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