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Fast detection of myricetin with the use of dedicated microdroplets
IEEE Sensors Journal ( IF 4.3 ) Pub Date : 2020-01-15 , DOI: 10.1109/jsen.2019.2945044
Zuoren Xiong , Hai Zhang , Yuelan Lu , Lingli Zhang , Weimin Sun , Yongjun Liu

A 4-cyano-4’-pentylbiphenyl(5CB) microdroplet-based sensing method for myricetin (MY) detection, which is produced by a syringe pump connected tapered capillary microtube and functionalized by dodecyltrimethylammonium bromide (DTAB) and deoxyribonucleic acid (DNA) at the aqueous/liquid crystal (LC) interface is proposed and demonstrated. As the concentration of MY increases, the 5CB microdroplet exhibits a structural transition from a bipolar configuration to a radial configuration. We also exploit the 5CB microdroplet to act as an optical microcavity of the whispering gallery mode (WGM) and obtain typical WGM lasing spectra under a pulsed laser pump. The WGM spectrum, which is related to the orientation of LC molecules at the aqueous/LC interface, presents a spectral blue shift with the increase of the MY addition. The sensitivity within the detection range is 0.04 nm/ $\mu \text{M}$ . The experimental results demonstrate the feasibility of this simple and small size system for MY detection.

中文翻译:

使用专用微滴快速检测杨梅素

一种用于杨梅素 (MY) 检测的基于 4-氰基-4'-戊基联苯 (5CB) 微滴的传感方法,其由连接锥形毛细管微管的注射泵产生,并由十二烷基三甲基溴化铵 (DTAB) 和脱氧核糖核酸 (DNA) 在提出并演示了水/液晶(LC)界面。随着 MY 浓度的增加,5CB 微滴表现出从双极配置到径向配置的结构转变。我们还利用 5CB 微滴作为回音壁模式 (WGM) 的光学微腔,并在脉冲激光泵下获得典型的 WGM 激光光谱。WGM 光谱与 LC 分子在水相/LC 界面的取向有关,随着 MY 添加量的增加,光谱呈现蓝移。检测范围内的灵敏度为 0.04 nm/ $\mu \text{M}$ 。实验结果证明了这种简单且小尺寸的系统用于 MY 检测的可行性。
更新日期:2020-01-15
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