摘要

为了改善普通81°倾斜光纤光栅在生化检测中灵敏度低、检测极限不理想等问题，提出一种基于氧化石墨烯修饰腐蚀型81°倾斜光纤光栅的牛血清蛋白生物传感器，分析了该传感器的原理与传感特性.使用氢氟酸溶液腐蚀减小光栅直径，提高其对折射率的灵敏度，并用氧化石墨烯修饰光栅，然后将牛血清蛋白单克隆抗体固定于光栅表面，用于对牛血清蛋白的特异性检测.实验结果表明，氧化石墨烯集成腐蚀型81°倾斜光纤光栅生物传感器对牛血清蛋白的检测范围为0.15~15 nmol/L，检测极限为~0.165 nmol/L，其线性响应区域的灵敏度为~182 pm/（nmol·L^-1），传感器的检测范围较氧化石墨烯集成标准直径81°倾斜光纤光栅有所降低，但其灵敏度提高了5.3倍，且检测极限有较大的改善.

Abstract

In order to improve the sensitivity and limit of detection of 81° tilted fiber grating, bovine serum albumin immunosensor based on graphene oxide modified cladding-etched 81° tilted fiber grating was proposed, the principle and sensing properties of the sensor were analyzed. Refractive index sensitivity of 81° tilted fiber grating was improved by etching with hydrofluoric acid. Then the etched 81° tilted fiber grating was coated with graphene oxide, and bovine serum albumin monoclonal antibody were modified on the surface of 81° tilted fiber grating for the specific detection of bovine serum albumin. Experimental results show that the detection range of the immunosensor is 0.15~15 nmol/L, limit of detection ~0.165 nmol/L, and the sensitivity in its linear response region is ~182 pm/(nmol·L^-1). Although the detection range decrease, the sensitivity is ~5.3 times of that of the un-etched graphene oxide coated 81° tilted fiber grating, and the limit of detection is also improved.

补充资料

中图分类号：TN253

DOI：10.3788/gzxb20194812.1206001

所属栏目：光纤光学与光通信

基金项目：|National Natural Science Foundation of China (Nos.61875026, 61505017), the Foundation and Cutting-edge Research Projects of Chongqing Science and Technology Commission (Nos. cstc2018jcyjAX0122, cstc2019jcyj-msxmX0093), Science and Technology Project of Chongqing Education Commission (No.KJQN201801121), Graduate Student Innovation Program of Chongqing University of Technology (No.ycx2018231)

收稿日期：2019-06-10

修改稿日期：2019-07-23

网络出版日期：2020-03-17

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联系人作者：罗彬彬(luobinbin@cqut.edu.cn)

备注：|National Natural Science Foundation of China (Nos.61875026, 61505017), the Foundation and Cutting-edge Research Projects of Chongqing Science and Technology Commission (Nos. cstc2018jcyjAX0122, cstc2019jcyj-msxmX0093), Science and Technology Project of Chongqing Education Commission (No.KJQN201801121), Graduate Student Innovation Program of Chongqing University of Technology (No.ycx2018231)

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引用该论文

Ya-jie WANG,Bin-bin LUO,Sheng-hui SHI,Shang-hai JIANG,De-cao WU,Sheng-xi WU,You-ming LU,Tao-jiang WU,Ming-fu ZHAO. Biosensor Based on Cladding-etched 81° Tilted Fiber Grating Coated with Graphene Oxide[J]. ACTA PHOTONICA SINICA, 2019, 48(12): 1206001-1206001

王亚杰,罗彬彬,石胜辉,蒋上海,吴德操,吴胜昔,鲁友铭,巫涛江,赵明富. 氧化石墨烯集成腐蚀型81°倾斜光栅生物传感器[J]. 光子学报, 2019, 48(12): 1206001-1206001