Optofluidic laser explosive sensor with ultralow detection limit and large dynamic range using donor-acceptor-donor organic dye

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Jieyun Wu
  • Maowen Fan
  • Guowei Deng
  • Chaoyang Gong
  • Yun-Jiang Rao
  • Yuan Gong

Detail(s)

Original languageEnglish
Article number126830
Number of pages9
Journal / PublicationSensors and Actuators, B: Chemical
Early online date18 Jul 2019
Publication statusPublished - 1 Nov 2019

Abstract

Due to the significance of explosive detection for homeland security and environmental protection, the research of new materials and new methodologies for sensing electron-deficient explosive nitryl aromatics is urgently imperative. In this paper we demonstrate an optofluidic laser sensor for explosive detection by using a highly electron-rich dye (dye-1) with donor-acceptor-donor conjugated structure. The design and facile synthesis process of dye-1 are described. Theoretical calculations, UV–vis absorption and fluorescence spectra are investigated to understand the structure-property relations. Exceptionally high quantum yield of emission in solution is achieved. As a proof of concept, electron-deficient explosive molecule 2, 4-dinitrotoluene (DNT) is used as a model analyte to evaluate the performance of the optofluidic laser sensor. Experimental results indicate that the optofluidic dye laser sensor achieves a large dynamic range with 4 orders of magnitude and an ultralow limit of detection (10 nM), much better than fluorescent sensor. This work provides a route to expand the applications of optofluidic laser for sensitive biochemical detection through specific luminescent materials.

Research Area(s)

  • Chemical sensor, Donor-acceptor-donor dye, Explosive detection, Fluorescence, Optofluidic laser

Citation Format(s)

Optofluidic laser explosive sensor with ultralow detection limit and large dynamic range using donor-acceptor-donor organic dye. / Wu, Jieyun; Fan, Maowen; Deng, Guowei; Gong, Chaoyang; Chen, Kaixin; Luo, Jingdong; Chiang, Kin Seng; Rao, Yun-Jiang; Gong, Yuan.

In: Sensors and Actuators, B: Chemical, 01.11.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review