In this study we have developed a highly sensitive optical sensor for the detection of epinephrine using carbon dots co-doped with samarium and nitrogen (Sm,N-CDs) with a very low detection limit of 28.1 nM and a broad linear dynamic range from (0–105 nM). Various techniques were employed to characterize the synthesized material, aiming to understand its morphological and physicochemical characteristics. The synergistic effect of the synthesized Sm,N-CDs demonstrated excellent optical performance, high selectivity and photostability. Additionally, good recovery findings were obtained when the sensor’s viability for Epinephrine detection in biological fluid samples that had been spiked was evaluated. In addition, we have developed an smartphones-based sensor to record the solution’s fluorescent color shift as it is being sensed. Using a mobile phone application to examine the green, red, and blue values from these photos, the comparable LOD was found to be 17.21 μM in a (0–90 μM) wide linear range of concentration. This straightforward, affordable, and quick screening device is highly demanding for the on-the-spot identification of the analytes at remote locations where advanced instrumentation is typically unavailable. Density functional theory was used to examine energy, stability, band gap, and how Ep interacted with the Sm,N-CDs nanoparticles.

中文翻译：

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用于检测肾上腺素的钐、氮共掺杂碳点：理论和实验


在这项研究中，我们开发了一种高灵敏度光学传感器，用于使用钐和氮共掺杂碳点 (Sm,N-CD) 检测肾上腺素，其检测限非常低，为 28.1 nM，线性动态范围为 ( 0–105 nM）。采用各种技术来表征合成材料，旨在了解其形态和物理化学特征。合成的Sm,N-CDs的协同效应表现出优异的光学性能、高选择性和光稳定性。此外，当评估传感器在已加标的生物液体样品中检测肾上腺素的可行性时，获得了良好的回收结果。此外，我们还开发了一种基于智能手机的传感器，用于记录溶液被检测到时的荧光颜色变化。使用手机应用程序检查这些照片中的绿色、红色和蓝色值，发现在 (0–90 μM) 宽线性浓度范围内，可比较的 LOD 为 17.21 μM。这种简单、经济且快速的筛查设备对于在通常没有先进仪器的偏远地区现场鉴定分析物要求很高。密度泛函理论用于检查能量、稳定性、带隙以及 Ep 如何与 Sm,N-CDs 纳米颗粒相互作用。