University of Dokuz Eylul, The Graduate School of Natural and Applied Sciences, Department of Chemistry, Izmir, Turkey.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 May;90:177-85. doi: 10.1016/j.saa.2012.01.042. Epub 2012 Jan 27.
In this work, the use of electrospun nanofibrous materials as highly responsive fluorescence quenching-based copper sensitive chemosensor is reported. Poly(methyl methacrylate) and ethyl cellulose were used as polymeric support materials. Sensing slides were fabricated by electrospinning technique. Copper sensors based on the change in the fluorescence signal intensity of fluoroionophore; N'-3-(4-(dimethylamino phenly)allylidene)isonicotinohydrazide. The sensor slides exhibited high sensitivities due to the high surface area of the nanofibrous membrane structures. The preliminary results of Stern-Volmer analysis show that the sensitivities of electrospun nanofibrous membranes to detect Cu(II) ions are 6-20-fold higher than those of the continuous thin films. By this way we obtained linear calibration plots for Cu(II) ions in the concentration range of 10(-12)-10(-5)M. The response times of the sensing slides were less than 1 min. Stability of the employed ionophore in the matrix materials was excellent and when stored in the ambient air of the laboratory there was no significant drift in signal intensity after 6 months. Our stability tests are still in progress.
在这项工作中，报告了将电纺纳米纤维材料用作对铜具有高响应的荧光猝灭型铜敏化学传感器。聚甲基丙烯酸甲酯和乙基纤维素用作聚合物支撑材料。通过静电纺丝技术制造传感片。基于荧光离子对 N'-3-(4-(二甲氨基苯基)亚乙烯基)异烟酰肼的荧光信号强度变化的传感器。由于纳米纤维膜结构的高表面积，传感器片表现出高灵敏度。Stern-Volmer 分析的初步结果表明，电纺纳米纤维膜检测 Cu(II)离子的灵敏度比连续薄膜高 6-20 倍。通过这种方式，我们获得了 Cu(II)离子在 10(-12)-10(-5)M 浓度范围内的线性校准曲线。传感片的响应时间小于 1 分钟。在基质材料中，所使用的离子载体的稳定性非常好，并且在实验室的环境空气中储存 6 个月后，信号强度没有明显漂移。我们的稳定性测试仍在进行中。
