A General Approach to the Synthesis of M@Au/Ag (M = Au, Pd, and Pt) Nanorattles with Ultrathin Shells Less Than 2.5 nm Thick

Yang, Miaoxin; Gilroy, Kyle D.; Xia, Younan

doi:10.1002/ppsc.201600279

Cited by 10 publications

(6 citation statements)

References 37 publications

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“…The nanocage was approximated as a nanobox, which was generated by i ) creating a cube and ii ) subtracting a smaller cube from the interior to create a box, as described in previous reports. 22–24 Once the shape was generated and inspected with Visual Molecular Dynamics (VMD) 1.9.2, it was uploaded as a shape-file into the ddscat 7.2.0 software. In all cases, the propagation (k-vector) and electric field (E x and E y -field) of the incident photon were perpendicular and parallel, respectively, to the (100)-facet of the cubic box, as indicated in Fig.…”

Section: Methodsmentioning

confidence: 99%

Enhancing the tactile and near-infrared sensing capabilities of electrospun PVDF nanofibers with the use of gold nanocages

Xie

et al. 2018

J. Mater. Chem. C

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Owing to its piezoelectric and pyroelectric properties, poly(vinylidene fluoride) (PVDF) has been extensively explored for applications related to tactile sensing, energy harvesting, and thermal imaging. However, PVDF cannot be directly used to detect light because of its weak absorption in the visible and near-infrared (NIR) regions, preventing effective conversion from light to heat and then electrical signal. In this work, we address this issue by incorporating Au nanocages (AuNCs) into PVDF nanofibers during electrospinning. The strong and tunable optical absorption associated with AuNCs makes them an effective transducer for converting light to heat and then electrical signal. The presence of AuNCs and the strong electric field inherent to electrospinning both promote the formation of the ferroelectric β phase for maximal piezoelectric and pyroelectric conversions. With the incorporation of AuNCs, the electrospun PVDF nanofibers show enhanced capabilities for tactile and NIR sensing. While the voltage output under the tactile force is increased by 12.6-fold relative to the case of pristine PVDF nanofibers, a voltage output of 7.2 V is achieved when the hybrid device is subjected to the on/off cycles of NIR irradiation by an 808-nm diode laser at a power density of 0.2 W/cm2.

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Section: Methodsmentioning

confidence: 99%

Enhancing the tactile and near-infrared sensing capabilities of electrospun PVDF nanofibers with the use of gold nanocages

Xie

et al. 2018

J. Mater. Chem. C

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“…Pd–Au bimetallic nanoparticles have the plasmonic‐induced enhancement of electrocatalytic activity for ethanol oxidation . Compared to bimetallic nanoparticles, trimetallic nanosystems offer new functionalities and additional parameters to tailor the physical and chemical properties of nanoparticles . In terms of plasmonic nanomaterials, trimetallic Au–Cu–Ag nanostructures are the most attractive because Au, Ag, and Cu can all support localized surface plasmon resonance in the visible wavelength region and act as catalytic active sites for driving chemical reaction .…”

Section: Methodsmentioning

confidence: 99%

“…[10] Compared to bimetallic nanoparticles, trimetallic nanosystems offer new functionalities and additional parameters to tailor the physical and chemical properties of nanoparticles. [8,9,11,12] In terms of plasmonic nanomaterials, trimetallic Au-Cu-Ag nanostructures are the most attractive because Au, Ag, and Cu can all support localized surface plasmon resonance in the visible wavelength region [13][14][15] and act as catalytic active sites for driving chemical reaction. [16] For example, Au-Ag-Cu alloys provided a new possibility to tailor specific optical permittivity by tuning their intermixing ratios.…”

Section: Shutang Chen Gabriella Reggiano Sravan Thota and Jing Zhao*mentioning

confidence: 99%

Au–Cu–Ag Nanorods Synthesized by Seed‐Mediated Coreduction and Their Optical Properties

Chen

Reggiano

Thota

et al. 2017

Part & Part Syst Charact

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Development of trimetallic nanoparticles can potentially broaden the optical window for plasmonic applications, but can also offer new photocatalysts for organic synthesis. The optical and catalytic properties can be tuned by the ratio between different components and how they are distributed in the nanoparticles, in addition to their size and shape. This work reports a seed‐mediated coreduction method for the fabrication of Au‐Cu‐Ag nanorods in oil phase. The composition and morphology of trimetallic Au‐Cu‐Ag nanostructures can be controlled by adjusting the injection temperature and the concentration of silver precursor. An additional peak (around 395 nm) is observed in extinction spectrum of trimetallic Au‐Cu‐Ag nanorods compared to that of bimetallic Au‐Cu nanorods, caused by the segregated silver composition in the trimetallic nanorods. The reported synthesis can be used to develop a wide range of trimetallic nanostructures with tunable optical properties and functionality.

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“…Such kind of reaction at this stage have been usually avoided in previous studies, since it fully destroys the well-defined morphology of hollow nanostructure, such as nanocage or nano-rattle. [20] However, it can be interesting to be developed as an effective means if the resulting products manifested distinct morphology or elemental distribution that can be difficult to achieve via the conventional routes. To this end, we systematically investigated the reaction parameters to evaluate their roles in determining the morphology and structure of final products, respectively.…”

Section: Formation Mechanismsmentioning

confidence: 99%

Synthesis of Branched Au‐PdAg Hybrid Nanosheets by Controlled Reduction in a Galvanic Replacement Reaction

Zheng

Zhang

et al. 2021

ChemNanoMat

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We report a niche strategy to fabricate planar trimetallic nanocrystals with in-plane branches and a unique hybrid structure. The success of current work relies on the use of seeded growth to produce Au@Ag core-shell nanocubes, followed by the reaction with an excessive third metal precursor (i. e., Pd) via galvanic replacement reaction (GRR) in the presence of controlled reduction. The morphology of resulting products varied in the order of cube, concave cube, hollow cage, yolk-shell frame, and finally branched nanoplates with Au-PdAg hybrid structure. The controlled reduction involved in the GRR process, together with the use of Au seed at appropriate amounts and docosyltrimethylammonium chloride as the capping agent, is demonstrated to be crucial for the formation of such unique structure. When loaded on carbon black and working as electrocatalysts for electroxidation of ethanol in alkaline media, the current products exhibit satisfying electrocatalytic activity (e. g., 591 mA mg Pd À 1 in mass activity and 10.01 A m À 2 in specific activity), improved kinetics, and long-term durability, as compared to commercial Pt/C. The present study offers a feasible route to applying precise spatial control over elemental metals for two-dimensional dendritic noble metal nanocrystals and could be potentially extended to other metals or alloy.

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A General Approach to the Synthesis of M@Au/Ag (M = Au, Pd, and Pt) Nanorattles with Ultrathin Shells Less Than 2.5 nm Thick

Cited by 10 publications

References 37 publications

Enhancing the tactile and near-infrared sensing capabilities of electrospun PVDF nanofibers with the use of gold nanocages

Enhancing the tactile and near-infrared sensing capabilities of electrospun PVDF nanofibers with the use of gold nanocages

Au–Cu–Ag Nanorods Synthesized by Seed‐Mediated Coreduction and Their Optical Properties

Synthesis of Branched Au‐PdAg Hybrid Nanosheets by Controlled Reduction in a Galvanic Replacement Reaction

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