化学
生物相容性
荧光
量子产额
化学稳定性
检出限
硫黄
碳纤维
发光
纳米材料
纳米技术
生物相容性材料
核化学
生物成像
氮气
分析化学(期刊)
光化学
色谱法
有机化学
材料科学
光电子学
生物医学工程
物理
复合材料
复合数
医学
量子力学
作者
Waheed Ullah Khan,Lu-Ping Qin,Lixin Chen,Wasim Ullah Khan,Shah Zeb,Ali Khan,Shengzhen Li,Salim Khan,Sajid Kamal,Ping Zhou
标识
DOI:10.1016/j.aca.2023.340847
摘要
Fluorescent carbon dots have been highly reported nanomaterials in recent times because of their excellent physio-chemical properties and various field of applications. Herein, a one-step hydrothermal approach was used to synthesize high biocompatible nitrogen and sulfur co-doped carbon dots, and examined their chemical sensing (Hg2+) and biological imaging properties. The N,S-CDs exhibited blue light, demonstrating a high quantum yield of up to 44.5% and excitation-independent fluorescent characteristics. Cytotoxicity was observed by CCK-8 assay using T-ca cells as a target source. Cell viability was recorded over 80% even after 7 days of treatment with a concentration up to 400 μg/mL, indicating low-toxicity of N,S-CDs. Notably, the bright blue fluorescence of N,S-CDs was quenched by introducing toxic Hg2+ ions into the solution. The detection limit was calculated to be about ∼3.5 nM, which is quite impressive compared to previous reports. Because of their low-toxicity, nano-size, and environment friendly properties, N,S-CDs could be excellent fluorescent agents for bio-imaging applications. The biological stability of fluorescent N,S-CDs was tested over time, and the findings were significant even after 8 days of incubation with T-ca cells. Because of good biocompatibility and bright fluorescence, N,S-CDs were suitable for in vivo imaging.
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