改性石墨烯包覆光纤的马赫-曾德尔大肠杆菌传感器

彭志清; 廖杰; 李玉洁; 冯文林; 杨晓占

doi:10.3788/OPE.20202802.0296

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改性石墨烯包覆光纤的马赫-曾德尔大肠杆菌传感器

现代应用光学 | 更新时间：2020-07-16

- 改性石墨烯包覆光纤的马赫-曾德尔大肠杆菌传感器
- Escherichia coli fiber sensor based on modified graphene coated fiber Mach-Zehnder interference
- 光学精密工程 2020年28卷第2期页码：296-302
- 作者机构：
  
  1.重庆理工大学理学院物理与能源系, 重庆 400054
  2.绿色能源材料技术与系统重庆市重点实验室, 重庆 400054
  3.中山大学附属第六医院, 广东广州 510665
- 作者简介：
  
  [ "彭志清(1994-)，男，江西萍乡人，硕士研究生，2016年于重庆理工大学获得学士学位，主要从事光纤传感的研究。E-mail: 522982466@qq.com" ]
  冯文林(1976-), 男, 四川南部人, 博士, 教授, 2008年于四川大学获得博士学位，2009-2011重庆大学“光学工程”博士后流动站博士后，2011-2012清华大学访问学者，2013-2014美国阿肯色大学访问学者，主要从事光电功能材料与器件方面的研究。E-mail: wenlinfeng@126.com FENG Wen-lin, E-mail: wenlinfeng@126.com
- 基金信息：
  
  国家自然科学基金资助项目(51574054);重庆市科技局社会事业与民生保障科技创新专项(cstc2017shmsA20017);重庆市高校创新团队资助项目(CXTDX201601030);重庆市科技局项目(cstc2018jcyjAX0294);重庆市科技创新领军人才项目(CSTCCXLJRC201905)
- DOI：10.3788/OPE.20202802.0296
  中图分类号： TN253
- 收稿日期：2019-06-25，
  
  修回日期：2019-08-20，
  
  录用日期：2019-8-20，
  
  纸质出版日期：2020-02-15
- 稿件说明：
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彭志清, 廖杰, 李玉洁, 等. 改性石墨烯包覆光纤的马赫-曾德尔大肠杆菌传感器[J]. 光学精密工程, 2020,28(2):296-302.

Zhi-qing PENG, Jie LIAO, Yu-jie LI, et al. Escherichia coli fiber sensor based on modified graphene coated fiber Mach-Zehnder interference[J]. Optics and precision engineering, 2020, 28(2): 296-302.
彭志清, 廖杰, 李玉洁, 等. 改性石墨烯包覆光纤的马赫-曾德尔大肠杆菌传感器[J]. 光学精密工程, 2020,28(2):296-302. DOI： 10.3788/OPE.20202802.0296.

Zhi-qing PENG, Jie LIAO, Yu-jie LI, et al. Escherichia coli fiber sensor based on modified graphene coated fiber Mach-Zehnder interference[J]. Optics and precision engineering, 2020, 28(2): 296-302. DOI： 10.3788/OPE.20202802.0296.

摘要

针对日益严峻的食品安全问题，特别是食源性致病菌的快速检测，本文提出一种基于表面改性石墨烯粗锥型马赫-曾德尔干涉结构的光纤大肠杆菌传感器。首先，截取一根4 cm的实心光子晶体光纤，两端分别与两根单模光纤进行粗锥熔接，形成基于马赫-曾德尔干涉原理的传感结构；接着，制备一种表面改性石墨烯敏感材料，将它涂覆在实心光子晶体光纤的表面，使传感器对大肠杆菌溶液有较高的灵敏度；最后，将上述传感器置于水槽中，以此检测大肠杆菌溶液浓度。实验结果表明，在大肠杆菌溶液浓度为50~600 cfu/mL内，随着菌液的浓度增大，传感器的干涉光谱发生了明显的蓝移，灵敏度为3.43 pm/(cfu·mL

-1

)，菌液浓度与波长偏移的线性度为0.956 49，检测限为67.18 cfu/mL，响应时间为15 s。该传感器成本低、体积小、响应时间快，适用于低浓度大肠杆菌浓度的快速检测。

Abstract

To solve increasingly serious food safety problems

especially the rapid detection of food-borne viruses

an E. coli sensor based on the surface-modified graphene enlarged-cone Mach-Zehnder interference structure was proposed in this study. First

a 4 cm solid photonic crystal fiber was intercepted and coarsely fused with two single-mode fibers to form an interference structure based on the Mach-Zehnder principle. Next

surface-modified graphene sensitive material was prepared. The modified graphene

coated on the surface of the solid photonic crystal fiber

allowed the sensor to have a higher sensitivity to

E. coli

solutions. Finally

the above sensor is placed in a water tank to detect the concentration of the

E. coli

. The experimental results show that the interference spectrum of the sensor has a significant blue shift with a sensitivity of 3.43 pm/(cfu·mL

-1

) in the range of 50-600 cfu/mL of the

E. coli

solution. The linearity between the bacterial concentration and wavelength shift is 0.956 49

detection limit is 67.18 cfu/ml

and response time is 15 s. The sensor has low cost

small volume

fast response time

and is suitable for the rapid detection of low concentration

E. coli

关键词

Keywords

references

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