Discrete-dipole approximation for the optical properties with morphological changes of silver nanoprism and nanosphere via galvanic reaction

Lee, Hyejin; Ro, Geonmin; Kim, Ju Min; Kim, Younghun

doi:10.1016/j.matlet.2017.07.130

Cited by 8 publications

(3 citation statements)

References 12 publications

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“…Because AuNS particles were prepared by the GRR based on AgNPs, it showed a hollow-shell structure with a rough surface, 28 which looks like a hollow roseberry. The particle size of AuNS measured by TEM and dynamic light scattering (DLS) spectroscopy is ca.…”

Section: Resultsmentioning

confidence: 99%

Photothermal Cellulose-Patch with Gold-Spiked Silica Microrods Based on Escherichia coli

Han

Hong

et al. 2018

ACS Omega

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Plasmonic-mediated photothermal heating under near-infrared (NIR) irradiation is an emerging key technology in the field of photothermal therapy and chemical reactions. However, there are few reports of photothermal film (dry-type patch), and thus, in this work, we developed the plasmonic-induced photothermal cellulose-patch operating in the NIR region. Hollow and spikelike gold nanostructures, gold-spikes, as plasmonic nanoparticles were prepared and decorated on silica microrods, which were prepared based on a unicellular organism, Escherichia coli, as a framework. In addition, freestanding cellulose-patch was prepared by mixing filter-paper pulp and armored golden E. coli (AGE) microrods. The major absorbing peak of AGE solution was revealed to be 873 nm, and the surface temperature of patch was increased to 264 °C within a very short time (1 min). When NIR laser was irradiated on the patch dipped in the water, the formation of water vapor and air bubbles was observed. The heating efficiency of indirect heat transfer via conduction from patch-to-water was 35.0%, while that of direct heat transfer via radiation from patch in water was 86.1%. Therefore, the cellulose-patch containing AGE microrods has possible applicability to desalination and sterilization because of its fast heating rate and high light-to-heat conversion under the irradiation of low-powered IR laser.

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Section: Resultsmentioning

confidence: 99%

Photothermal Cellulose-Patch with Gold-Spiked Silica Microrods Based on Escherichia coli

Han

Hong

et al. 2018

ACS Omega

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“…We used the DDSCAT method [ 39 , 40 , 41 ] to study the absorption peaks and corresponding wavelengths of gold nanoparticles with different shapes and sizes in different media refractive indices. We control the same medium, which is benzene, under visible light of 530–550 nm.…”

Section: Methodsmentioning

confidence: 99%

Design of a Dual-Technology Fusion Sensor Chip with a Ring Electrode for Biosensing Application

Zhu

et al. 2019

Micromachines

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Quartz crystal microbalance (QCM) is still a new high-precision surface detection technique. However, the adsorption quality detected by the QCM currently contains a solvent-coupling quality and cannot separate the actual biomolecular mass. Local surface plasmon resonance (LSPR) can detect the mass of biomolecules, but requires a certain contrast between the solvent of the surrounding medium and the refractive index of the adsorbed layer. The sensor chip, combining two compatible technologies, can realize the simultaneous detection of biomolecules and improve the refractive index sensitivity. The structure of our chip is to prepare the ring-shaped gold electrode on the upper surface of the quartz crystal, the circular gold electrode on the bottom surface, and the spherical gold nanoparticles arrays in the center region of the ring electrode to form a QCM/LSPR dual-technology chip. Through simulation, we finally get the size of the best energy trap by the two electrodes on the upper surface and the lower surface: the ring-top electrode with a thickness of 100 nm, an inner diameter of 4 mm, and an outer diameter of 8 mm; and the bottom electrode with a thickness of 100 nm and a radius of 6 mm. By comparing the refractive index sensitivity, we chose a spherical gold nanoparticle with a radius of 30 nm and a refractive sensitivity of 61.34 nm/RIU to design the LSPR sensor chip.

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“…Silver nanoparticles (AgNPs) exhibit distinct properties that make them excellent candidates for catalysis, sensing, and antibacterial applications [15]. AgNPs are considered as ideal candidates for colorimetric sensing because of their photo-stability [16] and exclusive localized surface plasmon resonance (LSPR) which can change their average size, morphology and distances among particles [17]. Hence, AgNPs based colorimetric sensors are valuable due to their marked naked eye detection of analytes of interest based on their LSPR based nature.…”

Section: Introductionmentioning

confidence: 99%

Trace Level Colorimetric Hg2+ Sensor Driven by Citrus japonica Leaf Extract Derived Silver Nanoparticles: Green Synthesis and Application

et al. 2021

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In this report we demonstrate the use of Citrus japonica (CJ) leaf extract for the first time as biological liquid to work as capping as well as reducing agent for synthesizing extremely stable silver nanoparticles (AgNPs) from its precursor silver salt. Different parameters such as pH, speed of reaction, silver salt concentrations and leaf extract were optimized for the formation of CJ-AgNPs. CJ-AgNPs were then characterized through techniques like Ultra-violet visible (UV-Vis) spectroscopy, Fourier transform infra-red (FTIR) spectroscopy, X-ray diffraction (XRD), atomic force microscopy (AFM), Zeta-potential analysis (ZPA) and dynamic light scattering (DLS). As-formed CJ-AgNPs were verified as highly sensitive, extremely selective, stable, economical, eco-friendly and rapidly responsive colorimetric sensor for Hg 2? detection based on color change in solution from yellow to brownish. The dynamic range of developed sensor worked linearly in the range of 0.3-7.3 lM with R 2 value of 0.999 and limit of (LOD) and limit of quantification (LOQ) as 0.09 lM and 0.30 lM respectively. The sensor demonstrated negligible interference under the influence of ions like Mg 2? , Zn 2? , Cu 2? , Co 2? , Pb 2? , Cd 2? and Fe 2? and corresponding anions. The developed sensor was successfully applied to detect Hg 2? at low level in some real water samples.

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Discrete-dipole approximation for the optical properties with morphological changes of silver nanoprism and nanosphere via galvanic reaction

Cited by 8 publications

References 12 publications

Photothermal Cellulose-Patch with Gold-Spiked Silica Microrods Based on Escherichia coli

Photothermal Cellulose-Patch with Gold-Spiked Silica Microrods Based on Escherichia coli

Design of a Dual-Technology Fusion Sensor Chip with a Ring Electrode for Biosensing Application

Trace Level Colorimetric Hg2+ Sensor Driven by Citrus japonica Leaf Extract Derived Silver Nanoparticles: Green Synthesis and Application

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