Radial growth of plasmon coupled gold nanowires on colloidal templates

FarrokhTakin, Elmira; Rodríguez-Fernández, Denis; Mattoli, Virgilio; Solís, Diego M.; Taboada, J. M.; Obelleiro, F.; Grzelczak, Marek; Liz‐Marzán, Luis M.

doi:10.1016/j.jcis.2014.12.018

Cited by 7 publications

(7 citation statements)

References 25 publications

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“…[16][17][18] Compositing with SiO2 also enables new plasmonic materials with exotic structures and enhanced functions. [19][20][21][22][23][24][25][26][27][28] For example, Rodríguez-Fernández et al used SiO2 semi-shells as the hard mask on Au nanoparticles (NPs) to obtain Au-SiO2 Janus nanostars, and derived Au Janus nanostars that were difficult to synthesize with conventional methods. 24 Farrokhtakin et al used colloidal SiO2 as the template to grow radial Au nanowire forests, which displayed strong plasmon coupling compared with isolated Au nanowires.…”

Section: Introductionmentioning

confidence: 99%

“…24 Farrokhtakin et al used colloidal SiO2 as the template to grow radial Au nanowire forests, which displayed strong plasmon coupling compared with isolated Au nanowires. 25 Chomette et al used Platonic solids of SiO2 as the template to fabricate Au-SiO2 tetrapods, hexapods, and dodecapods with well-controlled composition, morphology and high yield. 26 Self-assembly approaches were also adopted to prepare SiO2 core-Au nanoclusters with extraordinary optical 27 and sensing 28 properties.…”

Section: Introductionmentioning

confidence: 99%

“…Gold (Au) and its related hybrid materials − are of technological importance in catalysis, advanced optics, chemical sensing, biomedicine, solar-energy harvesting, and so on . Au–silica (SiO 2 ) hybrids are a prominent class of functional materials. − SiO 2 brings benefits such as enhanced stability, ,, ease of handling, , and modified optical property to Au. − Compositing with SiO 2 also enables new plasmonic materials with exotic structures and enhanced functions. − For example, Rodríguez-Fernández et al used SiO 2 semishells as the hard mask on Au nanoparticles (NPs) to obtain Au–SiO 2 Janus nanostars and derived Au Janus nanostars that were difficult to synthesize with conventional methods . Farrokhtakin et al used colloidal SiO 2 as the template to grow radial Au nanowire forests, which displayed strong plasmon coupling compared with isolated Au nanowires .…”

Section: Introductionmentioning

confidence: 99%

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Bioinspired One-Step Synthesis of Pomegranate-like Silica@Gold Nanoparticles with Surface-Enhanced Raman Scattering Activity

Zhou

Maeda

Tanabe³

et al. 2020

Langmuir

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Gold-silica (Au-SiO2) nanohybrids are of great technological importance, and it is crucial to develop facile synthetic protocols to prepare Au-SiO2 nanohybrids with novel structures. Here we report the bioinspired synthesis of pomegranate-like SiO2@Au nanoparticles (P-SiO2@Au NPs) via one-step aqueous synthesis from chloroauric acid and tetraethyl orthosilicate mediated by a basic amino acid, arginine. Effects of chloroauric acid, tetraethyl orthosilicate, and arginine on the morphology and optical property of the products are investigated in detail. The P-SiO2@Au NPs achieve tunable plasmon resonance depending on the amount of chloroauric acid, which affects the size and shape of the P-SiO2@Au NPs. Finite-difference time-domain simulations are performed, revealing that the plasmon peak red-shifts with increasing particle size. Arginine serves as the reducing and capping agents for Au as well as the catalyst for SiO2 formation, and also promotes the combination of Au and SiO2. Formation process of the P-SiO2@Au NPs is clarified through timecourse analysis. The P-SiO2@Au NPs show good sensitivity for both colloidal and paper-based surface-enhanced Raman scattering measurements. They achieve enhancement factor of 4.3✕10 7-8.5✕10 7 and a mass detection limit of ca. 1 ng using thiophenol as the model analyte.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bioinspired One-Step Synthesis of Pomegranate-like Silica@Gold Nanoparticles with Surface-Enhanced Raman Scattering Activity

Zhou

Maeda

Tanabe³

et al. 2020

Langmuir

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“…This methodology was applied for the solution of problems such as the design of nanoantennas [33,34] and optical wireless interconnects [35]. But among all the possible applications, we have concerned ourselves especially with biosensing, and particularly with surface enhanced Raman scattering (SERS) based spectroscopy [23,[36][37][38].…”

Section: Introductionmentioning

confidence: 99%

SQUEEZING MAXWELL'S EQUATIONS INTO THE NANOSCALE (Invited Paper)

Solís¹,

Taboada²,

Landesa³

et al. 2015

PIER

Self Cite

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Abstract-The plasmonic behavior of nanostructured materials has ignited intense research for the fundamental physics of plasmonic structures and their cutting-edge applications concerning the fields of nanoscience and biosensing. The optical response of plasmonic metals is generally well-described by classical Maxwell's Equations (ME). Thus, the understanding of plasmons and the design of plasmonic nanostructures can therefore directly benefit from lastest advances achieved in classic research areas such as computational electromagnetics. In this context, this paper is devoted to review the most recent advances in nanoplasmonic modeling, related with the latest breakthroughs in surface integral equation (SIE) formulations derived from ME. These works have extended the scope of application of Maxwell's Equations, from microwave/milimeter waves to infrared and optical frequency bands, in the emerging fields of nanoscience and medical biosensing.

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“…Gold nanowires were prepared by a modified substrate-assisted nanowire growth method first reported by He et al − In a typical synthesis, (3-aminopropyl)triethoxysilane or polylysine was used to coat a substrate to make the surface positively charged. Afterward, negatively charged, 5 nm diameter citrate-stabilized AuNPs were immobilized on the substrate as seeds, and the growth was performed in a medium containing HAuCl 4 , ascorbic acid as a mild reducing agent, and mercaptobenzoic acid (MBA) as a capping ligand.…”

mentioning

confidence: 99%

Gold Aerogel Monoliths with Tunable Ultralow Densities

et al. 2019

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Herein we report the fabrication of ultralight gold aerogel monoliths with tunable densities and pore structures. Gold nanowires are prepared at the gram scale by substrate-assisted growth with uniform size, ultrathin diameters, high purity, and a high aspect ratio. Freeze-casting of suspensions of these nanowires produces free-standing, monolithic aerogels with tunable densities from 6 to 23 mg/cm3, which to the best of our knowledge represents the lowest density monolithic gold material. We also demonstrate that the pore geometries created during freeze-casting can be systematically tuned across multiple length scales by the selection of different solvents and excipients in the feedstock suspension. The mechanical behavior of porous materials depends on relative density and pore architectures.

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Radial growth of plasmon coupled gold nanowires on colloidal templates

Cited by 7 publications

References 25 publications

Bioinspired One-Step Synthesis of Pomegranate-like Silica@Gold Nanoparticles with Surface-Enhanced Raman Scattering Activity

Bioinspired One-Step Synthesis of Pomegranate-like Silica@Gold Nanoparticles with Surface-Enhanced Raman Scattering Activity

SQUEEZING MAXWELL'S EQUATIONS INTO THE NANOSCALE (Invited Paper)

Gold Aerogel Monoliths with Tunable Ultralow Densities

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