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Bioinspired fluorescence carbon quantum dots extracted from natural honey: Efficient material for photonic and antibacterial applications
Nano-Structures & Nano-Objects Pub Date : 2020-09-29 , DOI: 10.1016/j.nanoso.2020.100589
P. Surendran , A. Lakshmanan , S. Sakthy Priya , K. Balakrishnan , P. Rameshkumar , Karthik Kannan , P. Geetha , Tejaswi Ashok Hegde , G. Vinitha

Fluorescent carbon quantum dots were extracted from natural honey using the hydrothermal approach. The XRD and HRTEM investigations confirm the morphology of the carbon quantum dots (CQDs) are spherical shape with a diameter of 8.29 nm. The FTIR and XPS analysis indicate the effective incorporation of nitrogen and sulfuratoms into the CQDs. The sample demonstrated the blue fluorescence by the UV-light illumination (λex=365nm). When excited at 350 nm, the quantum yield of honey CQDs was found to be 4.192 % at the emission wavelength (431 nm). Crucially for the first time, the existing honey CQDs generates a strong nonlinear optical response relative to some semiconductor QDs. The non-linear optical characterization was investigated utilizing the Z-Scan method. These CQDs exhibit self-defocusing nonlinearity and strong nonlinear performance in the absorption. Also, the agar well diffusion method used to investigate the antimicrobial efficacy of the CQDs against the foodborne pathogens. It is inferred from the existing observations that honey CQDs have been used as effective optoelectronic devices and antimicrobial agents.



中文翻译:

从天然蜂蜜中提取的受生物启发的荧光碳量子点:用于光子和抗菌应用的高效材料

使用水热法从天然蜂蜜中提取了荧光碳量子点。XRD和HRTEM研究证实,碳量子点(CQD)的形态为直径为8.29 nm的球形。FTIR和XPS分析表明氮和硫原子有效地掺入了CQD中。样品通过紫外线照射显示出蓝色荧光(λ=365纳米)。在350 nm激发时,发现蜂蜜CQD的量子产率为在发射波长(431 nm)下为4.192%。至关重要的是,相对于某些半导体QD,现有的Honey CQD首次产生了强大的非线性光学响应。使用Z-Scan方法研究了非线性光学表征。这些CQD在吸收中表现出自散焦非线性和强大的非线性性能。此外,琼脂井扩散方法还用于研究CQD对食源性病原体的抗菌功效。从现有的观察结果可以推断出,蜂蜜CQD已被用作有效的光电器件和抗菌剂。

更新日期:2020-11-03
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