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Cited by 174Advanced Fiber Optic SensorsPlasmonic and Surface Plasmon ResearchAdvanced Biosensing Techniques and Applications

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A polydopamine-modified optical fiber SPR biosensor using electroless-plated gold films for immunoassays

Shi, Se, Wang, Libing, Su, Rongxin, Liu, Boshi, Huang, Renliang, Qi, Wei, He, Zhimin·2015·Biosensors and Bioelectronics
DOI 10.1016/j.bios.2015.06.080
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Abstract

A sensitive and stable electroless-plated gold film for the preparation of an optical fiber surface plasmon resonance (SPR) sensor is presented in this work, together with a facile antibody immobilization method. Gold nanoparticles were uniformly adsorbed onto the surface of an optical fiber forming a film with a thickness of approximately 56.3 nm. The sensor had a high sensitivity with 2054 nm/RIU and 3980 nm/RIU in the refractive index ranges of 1.333-1.359 and 1.359-1.386, respectively. An SPR biosensor was developed based on polydopamine-modified gold film (PDA-Au), which was fabricated by a simple and quick spontaneous polymerization of dopamine (DA) on the gold film. When goat anti-human IgG antibodies were immobilized, the PDA-Au surface had a larger resonant wavelength shift of 66.21 nm compared with the traditional 11-mercaptoundecanoic acid-modified gold film (MUA-Au) surface. In addition, the PDA-Au surface enabled the sensitive and selective determination of human IgG down to a concentration of 2 μg mL(-1) with a high sensitivity of 0.41 nm per μg mL(-1). The PDA-Au surface exhibited an approximately four fold higher sensitivity and an about seven fold lower LOD than the MUA-Au surface to human IgG.

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Metadata

Authors
Shi, S., Wang, L., Su, R., Liu, B., Huang, R., Qi, W., & He, Z.
Affiliations
Tianjin University (CN)
Corresponding author
Su, Rongxin
ORCID
Venue
Biosensors and Bioelectronics
Publisher
Elsevier BV
Published
2015-12
Volume
74
Pages
454-460
ISSN
0956-5663 (ISSN-L)
DOI
10.1016/j.bios.2015.06.080
OpenAlex
W776384419
Cited by
174
References
2
Citations by year
2026: 7 · 2025: 19 · 2024: 20 · 2023: 10 · 2022: 26 · 2021: 14 · 2020: 18 · 2019: 14 · 2018: 16 · 2017: 13 · 2016: 15 · 2015: 2
FWCI
7.39
Type
journal article
Language
en
Open access
closed
Licence
Locations
  • Biosensors and Bioelectronics (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (21276192, 51473115)
  • Ministry of Education of the People's Republic of China (B06006, NCET-11-0372)
  • Ministry of Science and Technology of the People's Republic of China (2012AA06A303, 2012BAD29B05, 2012YQ090194)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Fiber Optic Sensors
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Plasmonic and Surface Plasmon Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Advanced Biosensing Techniques and Applications
Keywords
surface plasmon resonance biosensor, fiber optic sensors, polydopamine, gold nanoparticles, antibody immobilization, human IgG detection, immunoassay, 11-mercaptoundecanoic acid, refractive index sensitivity
MeSH terms
Electrodes, Equipment Design, Fiber Optic Technology, Gold, Immunoassay, Indoles, Membranes, Artificial, Polymers, Equipment Failure Analysis, Coated Materials, Biocompatible, Surface Plasmon Resonance, Metal Nanoparticles

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