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Preparation of Graphene/ITO Nanorod Metamaterial/U-Bent-Annealing Fiber Sensor and DNA Biomolecule Detection

1
Collaborative Innovation Center of Light Manipulations and Applications in Universities of Shandong, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
2
Institute of Materials and Clean Energy, Shandong Normal University, Jinan 250014, China
3
Shandong Key Laboratory of Medical Physics and Image Processing and Shandong Provincial Engineering and Technical Center of Light Manipulations, Shandong Provincial Key Laboratory of Optics and Photonic Device, Jinan 250014, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(8), 1154; https://doi.org/10.3390/nano9081154
Received: 1 July 2019 / Revised: 28 July 2019 / Accepted: 9 August 2019 / Published: 12 August 2019
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Abstract

In this paper, a graphene/ITO nanorod metamaterial/U-bent-annealing (Gr/ITO-NM/U-bent-A)-based U-bent optical fiber local surface plasmon resonance (LSPR) sensor is presented and demonstrated for DNA detection. The proposed sensor, compared with other conventional sensors, exhibits higher sensitivity, lower cost, as well as better biological affinity and oxidize resistance. Besides, it has a structure of an original Indium Tin Oxides (ITO) nanocolumn array coated with graphene, allowing the sensor to exert significant bulk plasmon resonance effect. Moreover, for its discontinuous structure, a larger specific surface area is created to accommodate more biomolecules, thus maximizing the biological properties. The fabricated sensors exhibit great performance (690.7 nm/RIU) in alcohol solution testing. Furthermore, it also exhibits an excellent linear response (R2 = 0.998) to the target DNA with respective concentrations from 0.1 to 100 nM suggesting the promising medical applications of such sensors. View Full-Text
Keywords: localized surface plasmon resonance biosensor; U-bent fiber; ITO metamaterials; high sensitivity; specificity deteection localized surface plasmon resonance biosensor; U-bent fiber; ITO metamaterials; high sensitivity; specificity deteection
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Yang, W.; Yu, J.; Xi, X.; Sun, Y.; Shen, Y.; Yue, W.; Zhang, C.; Jiang, S. Preparation of Graphene/ITO Nanorod Metamaterial/U-Bent-Annealing Fiber Sensor and DNA Biomolecule Detection. Nanomaterials 2019, 9, 1154.

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