Improved stability of gold nanoparticles on the optical fiber and their application to refractive index sensor based on localized surface plasmon resonance

Kim, Hyeong Min; Jeong, Dae Hong; Lee, Ho‐Young; Park, Jae Hyoung

doi:10.1016/j.optlastec.2019.02.002

Cited by 60 publications

(26 citation statements)

References 57 publications

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“…1a, the FO-LSPR sensor is used as a sensor by immobilization Au NPs to the surface of the optical fiber cross-section. In previous study, it was confirmed that the size of Au NP could be increased additionally from several nm to several tens nm by Au capping [13]. The second method is to increase the roughness of the optical fiber surface which is not covered with Au NPs by an etching process using Au NPs formed on the optical fiber surface as a mask.…”

Section: Introductionmentioning

confidence: 82%

“…After this, when the Au NPs were reacted with 1 mM of chloride trihydrate ( HAuCl 4 • 3H 2 O , 99%, Sigma Aldrich), the size of Au NP was increased with the reduction of gold ions. In previous study [13], the size of Au NP was increased by 3.3 nm on average for 30 min in proportion to the time of reaction with HAuCl 4 solution. The Au NP was increased additionally up to 20 nm after 180 min of reaction.…”

Section: Fabrication Of Fo-lspr Sensormentioning

confidence: 96%

“…As shown in Fig. 1b, when the size of Au NP is increased additionally by the first method, the amount of the scattered light is increased [13,14]. The roughness of the optical fiber surface is increased due to the second method so that the reflected light which is the background signal of the sensor's intensity from the surface of the optical fiber is reduced [15].…”

Section: Introductionmentioning

confidence: 95%

“…In the previous paper, it showed two performance improvements with Au capping process that can control the size of gold nanoparticle (Au NP) [13]. First, the sensitivity of the sensor was improved by increasing the size of Au NPs.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of fiber optic based localized surface plasmon resonance sensor by optical fiber surface etching and Au capping

Bae

Kim

Park

et al. 2019

Micro and Nano Syst Lett

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Fiber optic based localized surface plasmon resonance (FO-LSPR) sensor is one of the biosensors that detects specific biomolecules and can detect the onset of disease. In this paper, we propose two methods to improve the signal to noise ratio (SNR) of the sensor, which is one of the main characteristics of the FO-LSPR sensor. The first method is to increase the intensity of the sensor by increasing the size of gold nanoparticle (Au NP) formed on the optical fiber surface by Au capping method. The second method is to form a structure that reduces the reflection by increasing the roughness of the surface by etching the surface of the optical fiber using the Au NP formed on the surface of the optical fiber as a mask. Increasing the roughness of the optical fiber surface can reduce the background signal of the sensor. The two methods mentioned above can increase the SNR of the sensor. When the SNR of the sensor is increased, the efficiency of the sensor is improved.

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Section: Introductionmentioning

confidence: 82%

Section: Fabrication Of Fo-lspr Sensormentioning

confidence: 96%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improvement of fiber optic based localized surface plasmon resonance sensor by optical fiber surface etching and Au capping

Bae

Kim

Park

et al. 2019

Micro and Nano Syst Lett

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“…The seed-mediated growth technique was reported to adjust the particle size. The citrate ions were used to reduce Au + ions to Au 0 on the surface of Au NPs seeds during the Au capping process [ 125 ]. One can adjust the particle size by changing the growth time [ 126 ].…”

Section: Optical Fiber Lspr Biosensorsmentioning

confidence: 99%

Preparation and Application of Metal Nanoparticals Elaborated Fiber Sensors

Haoru

et al. 2020

Sensors

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In recent years, surface plasmon resonance devices (SPR, or named plamonics) have attracted much more attention because of their great prospects in breaking through the optical diffraction limit and developing new photons and sensing devices. At the same time, the combination of SPR and optical fiber promotes the development of the compact micro-probes with high-performance and the integration of fiber and planar waveguide. Different from the long-range SPR of planar metal nano-films, the local-SPR (LSPR) effect can be excited by incident light on the surface of nano-scaled metal particles, resulting in local enhanced light field, i.e., optical hot spot. Metal nano-particles-modified optical fiber LSPR sensor has high sensitivity and compact structure, which can realize the real-time monitoring of physical parameters, environmental parameters (temperature, humidity), and biochemical molecules (pH value, gas-liquid concentration, protein molecules, viruses). In this paper, both fabrication and application of the metal nano-particles modified optical fiber LSPR sensor probe are reviewed, and its future development is predicted.

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Advancement in Optical Biosensors to Detect Malignant Tumors

2024

Biosensors

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Improved stability of gold nanoparticles on the optical fiber and their application to refractive index sensor based on localized surface plasmon resonance

Cited by 60 publications

References 57 publications

Improvement of fiber optic based localized surface plasmon resonance sensor by optical fiber surface etching and Au capping

Improvement of fiber optic based localized surface plasmon resonance sensor by optical fiber surface etching and Au capping

Preparation and Application of Metal Nanoparticals Elaborated Fiber Sensors

Advancement in Optical Biosensors to Detect Malignant Tumors

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