Ultra-high sensitivity SPR fiber sensor based on multilayer nanoparticle and Au film coupling enhancement

Xia, Feng; Song, Hang; Zhao, Yong; Zhao, Wan‐Ming; Wang, Qi; Wang, Xue-Zhou; Wang, Botao; Dai, Zhe-Xin

doi:10.1016/j.measurement.2020.108083

Cited by 58 publications

(27 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure 6 b, it distinctly indicates that an Au/T-Hg 2+ -T/Au sandwich structure was formed in the sensing region. In an Au/T-Hg 2+ -T/Au structure, the nanoparticle is coupled with Au film like its mirror image, and a strong enhanced electric field is generated between the gold film and the nanoparticle [ 43 ]. Accordingly, Au NPs/T tags can enhance the response signal of a fiber-optic SPR sensor for Hg 2+ detection.…”

Section: Resultsmentioning

confidence: 99%

Thymine-Functionalized Gold Nanoparticles (Au NPs) for a Highly Sensitive Fiber-Optic Surface Plasmon Resonance Mercury Ion Nanosensor

et al. 2021

View full text Add to dashboard Cite

Mercury ion (Hg2+) is considered to be one of the most toxic heavy metal ions. Once the content of Hg2+ exceeds the quality standard in drinking water, the living environment and health of human beings will be threatened and destroyed. Therefore, the establishment of simple and efficient methods for Hg2+ ion detection has important practical significance. In this paper, we present a highly sensitive and selective fiber-optic surface plasmon resonance (SPR) Hg2+ ion chemical nanosensor by designing thymine (T)-modified gold nanoparticles (Au NPs/T) as the signal amplification tags. Thymine-1-acetic acid (T-COOH) was covalently coupled to the surface of 2-aminoethanethiol (AET)-modified Au NPs and Au film by 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride/N-Hydroxysuccinimide (EDC/NHS) activation effect, respectively. In the presence of Hg2+ ions, the immobilized thymine combines specifically with Hg2+ ions, and forms an Au/thymine-Hg2+-thymine/Au (Au/T-Hg2+-T/Au) complex structure, leading to a shift in SPR wavelength due to the strong electromagnetic couple between Au NPs and Au film. Under optimal conditions, the proposed sensor was found to be highly sensitive to Hg2+ in the range of 80 nM–20 µM and the limit of detection (LOD) for Hg2+ was as low as 9.98 nM. This fiber-optic SPR sensor afforded excellent selectivity for Hg2+ ions against other heavy metal ions such as Fe3+, Cu2+, Ni2+, Ba2+, K+, Na+, Pb2+, Co2+, and Zn2+. In addition, the proposed sensor was successfully applied to Hg2+ assay in real environmental samples with excellent recovery. Accordingly, considering its simple advantages, this novel strategy provides a potential platform for on-site determination of Hg2+ ions by SPR sensor.

show abstract

Section: Resultsmentioning

confidence: 99%

Thymine-Functionalized Gold Nanoparticles (Au NPs) for a Highly Sensitive Fiber-Optic Surface Plasmon Resonance Mercury Ion Nanosensor

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Nanomaterial enhancement For OFOF SPR sensors. [101,160,266,283] nanomaterial enhancement has become an effective tool for the detection of low-concentration analytes. For OFOF SPR sensors, many methods to enhance sensitivity have been reported by researchers.…”

Section: Figure 41mentioning

confidence: 99%

“…Common fiber SPR sensing structures that can be integrated in the microfluidic channels for OFOF biochemical sensing include etched/unclad sensing structure, [166,168] tapered fiber sensing structure, [265] and hetero-core sensing structure. [160,266] They have the advantages of simple preparation and low cost and have been widely used in the field of biochemical sensing.…”

Section: Common Fiber Surface Plasmon Resonances Sensing Structuresmentioning

confidence: 99%

Optical Fiber Optofluidic Bio‐Chemical Sensors: A Review

Zhang

Zhou

et al. 2021

Laser & Photonics Reviews

Self Cite

View full text Add to dashboard Cite

Optofluidic, as an emerging technology that combines photons and microfluidics, has become a powerful, intelligent, and universal sensing platform in the field of bio-chemical sensing. Optical fiber optofluidic (OFOF), as a branch of optofluidic technology, has stimulated a host of remarkable achievements in the field of bio-chemical sensing due to its superiority of compact structure, immunity to electromagnetic interference, low sample consumption, high sensitivity, and real-time dynamic response. In this paper, an overview of OFOF bio-chemical sensors is presented. The OFOF system architectures are introduced and some advanced functional materials and coating technologies that can be utilized in the OFOF sensing platform to achieve high-performance biochemical sensing are summarized. Research progress and current status of OFOF bio-chemical sensors based on various sensing mechanisms are summarized and analyzed, with emphases on their sensing principles, sensing structures, sensing applications, advantages, and disadvantages. Lastly, the existing challenges and future development trends of OFOF biochemical sensors are briefly discussed.

show abstract

“…3–5 It makes the structure and function of the coating develop to diversification. 6–9 Development of new structure and functional coatings has become a new focus of Au–Co alloy research. 10,11 German physicist Peter Grünberg and French physicist Albert Fert observed giant magnetoresistance, 12 in iron/chromium/iron and iron/chromium multi-layer films in 1988.…”

Section: Introductionmentioning

confidence: 99%

Cyanide-free electrolyte for Au/Co–Au nano-multilayer electrodeposition utilising 5,5-dimethylhydantoin as a complexing agent

Gong

Yuan

et al. 2022

RSC Adv.

View full text Add to dashboard Cite

show abstract

Ultra-high sensitivity SPR fiber sensor based on multilayer nanoparticle and Au film coupling enhancement

Cited by 58 publications

References 29 publications

Thymine-Functionalized Gold Nanoparticles (Au NPs) for a Highly Sensitive Fiber-Optic Surface Plasmon Resonance Mercury Ion Nanosensor

Thymine-Functionalized Gold Nanoparticles (Au NPs) for a Highly Sensitive Fiber-Optic Surface Plasmon Resonance Mercury Ion Nanosensor

Optical Fiber Optofluidic Bio‐Chemical Sensors: A Review

Cyanide-free electrolyte for Au/Co–Au nano-multilayer electrodeposition utilising 5,5-dimethylhydantoin as a complexing agent

Contact Info

Product

Resources

About