Alcohol Sensor Based on Surface Plasmon Resonance of ZnO Nanoflowers/Au Structure

Xu, Haoyuan; Song, Yutong; Zhu, Panpan; Zhao, Wenyu; Liu, Tongyu; Wang, Qi; Zhao, Tianming

doi:10.3390/ma15010189

Cited by 22 publications

(8 citation statements)

References 42 publications

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“…biotin) using nanophotonic devices such as cavity structures and metamaterials with layer structures have been reported [39][40][41]. Recently, biological sensing based on ZnO-related SPR and metamaterials are reported by some papers [42][43][44]. Therefore, monitoring biological interactions at the pM level could be realized by enhancing the structural and crystalline quality of ZnO-SPR sensors.…”

Section: Experimental Spr Reflectance Spectra Of the Hybrid Sample (A...mentioning

confidence: 99%

Biological Sensing Using Infrared SPR Devices Based on ZnO

Matsui¹

2022

Biomedical Engineering

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Biological detection based on surface plasmon resonances (SPRs) on metallic Ga-doped zinc oxide (ZnO: Ga) film surfaces is introduced as one of the interesting functionalities of ZnO. SPRs on ZnO: Ga films (ZnO-SPRs) have attracted much attention as alternative plasmonic materials in the infrared (IR) range. This chapter focuses on the structure and optical properties of ZnO-SPR with different layer structure from experimental and theoretical approaches. First, the plasmonic properties of single ZnO: Ga films excited by Kretschmann-type SPRs were investigated. Second, an insulator–metal–insulator structure with a ZnO: Ga film applied as a metal layer is introduced. Finally, hybrid layer structures with the capping of thin dielectric layers to ZnO-SPR (dielectric-assisted ZnO-SPR) were fabricated to enhance SPR properties in the IR range. The biological sensing on ZnO-SPR is experimentally demonstrated by measuring biological interactions. This work provides new insights for fabricating biological sensing platforms on ZnO materials.

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Section: Experimental Spr Reflectance Spectra Of the Hybrid Sample (A...mentioning

confidence: 99%

Biological Sensing Using Infrared SPR Devices Based on ZnO

Matsui¹

2022

Biomedical Engineering

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“…Metal nanoparticles (NP) find their numerous applications in different fields of fundamental research, industry, and medicine , due to their unique optical properties, electronic structure, tunable surface sites for catalytical reactions, − and antibacterial and anticancer effects. , The gold nanoparticles represent a unique case that combines all these properties. They can be synthesized in different sizes and shapes − that are appropriate, e.g., for the task of dye photodegradation, local electromagnetic field generation, and molecular sensors …”

Section: Introductionmentioning

confidence: 99%

Machine Learning Analysis of Reaction Parameters in UV-Mediated Synthesis of Gold Nanoparticles

et al. 2023

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Gold nanoparticles represent an important class of functional nanomaterials for optoelectronics, biomedical applications, and catalysis. Therefore, controllable synthesis of nanoparticles with specified size and shape is important. Though reduction of gold ions is quite a simple process and may be performed with many different protocols, the reproducibility of the results and transfer of protocols between independent research groups remains a challenging task. Machine learning analysis based on statistical approaches is hardly applicable to the published data, since most of the researchers report only successful syntheses. In this work, we apply uniform sampling of the reaction parameter space. The concentrations of gold precursor, reducing agent, and surfactant were varied via an improved Latin hypercube sampling, and each run was performed under in situ UV−vis control. Based on the resulting set of optical spectra, we address the relevant chemical questions about nanoparticle formation, their shape, and period of growth. Our work demonstrates a data driven approach applied to the space of reaction parameters in a limited available set of experiments.

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“…Surface plasmon resonance (SPR) sensors are sensitive to changes in the refractive index of the medium in contact with the metal film, and when the refractive index of the medium changes, the resonance wavelength or angle will be changed, thus realizing the detection of a specific medium [ 1 , 2 , 3 ]. SPR sensors are widely used in food safety [ 4 , 5 ], biology [ 6 , 7 , 8 ], and gas and temperature monitoring [ 9 , 10 , 11 , 12 ] because of their label-free detection, low cost, real-time measurement, and high sensitivity. SPR sensors include prism coupling [ 13 , 14 , 15 ], waveguide coupling [ 16 ], fiber coupling [ 17 , 18 , 19 ], and grating coupling [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Design and Simulation of Au/SiO2 Nanospheres Based on SPR Refractive Index Sensor

Sun

Song

et al. 2023

Sensors

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In this paper, three different structures of surface plasmon resonance (SPR) sensors based on the Kretschmann configuration: Au/SiO2 thin film structure, Au/SiO2 nanospheres and Au/SiO2 nanorods are designed by adding three different forms of SiO2 materials behind the gold film of conventional Au-based SPR sensors. The effects of SiO2 shapes on the SPR sensor are investigated through modeling and simulation with the refractive index of the media to be measured ranging from 1.330 to 1.365. The results show that the sensitivity of Au/SiO2 nanospheres could be as high as 2875.4 nm/RIU, which is 25.96% higher than that of the sensor with a gold array. More interestingly, the increase in sensor sensitivity is attributed to the change in SiO2 material morphology. Therefore, this paper mainly explores the influence of the shape of the sensor-sensitizing material on the performance of the sensor.

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Alcohol Sensor Based on Surface Plasmon Resonance of ZnO Nanoflowers/Au Structure

Cited by 22 publications

References 42 publications

Biological Sensing Using Infrared SPR Devices Based on ZnO

Biological Sensing Using Infrared SPR Devices Based on ZnO

Machine Learning Analysis of Reaction Parameters in UV-Mediated Synthesis of Gold Nanoparticles

Design and Simulation of Au/SiO2 Nanospheres Based on SPR Refractive Index Sensor

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