Noble metal-based composite nanomaterials fabricated via solution-based approaches

Liu, Hui; Yan, Feng; Chen, Dong; Li, Chengyin; Cui, Penglei; Yang, Jun

doi:10.1039/c4ta05801a

Cited by 104 publications

(50 citation statements)

References 406 publications

(562 reference statements)

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“…These fascinated optical properties allow bimetallic Au/Ag nanoparticles to play an active role in the modulation of fluorescent emission of various fluorophores via the fluorescent resonant energy transfer (FRET) or nanometal surface energy transfer (NSET) process. 47,48 Additionally, the spectral overlap between LSPR band of plasmonic nanostructures and excitation/emission wavelength of fluorophores was reported to be an essential parameter in these plasmon mediated fluorescence, especially for the experiments conducted in the solution phase. 49 Fortunately, semiconductor nanocrystals QD can be excited in a wide range wavelength to emit fluorescence with a quite narrow wavelength, and their fluorescent emission wavelength can be readily tuned by controlling the size and morphology of QD, thus the QD can be employed as ideal fluorophores in the plasmon modulated fluorescent experiments.…”

Section: Resultsmentioning

confidence: 99%

One-pot synthesis of Au/Ag bimetallic nanoparticles to modulate the emission of CdSe/CdS quantum dots

et al. 2015

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In this work, the gold/silver bimetallic nanoparticles (Au/Ag NPs) have been synthesized via a facile one-pot protocol involving co-reduction of chloroauric acid and silver nitrate with N, Ndimethylformamide (DMF) solvent in the presence of water soluble polyvinylpyrrolidone (PVP). The morphology of obtained Au/Ag NPs can be readily modified by changing reaction time and relative concentration ratio of gold/silver precursor. Subsequently, the synthesized Au/Ag NPs have been employed to modulate the fluorescent emission of CdSe/CdS quantum dots (QD) in the solution phase on the basis of plasmon controlled fluorescence. The experimental results demonstrated that the fluorescent emission of CdSe/CdS QD can be either obviously quenched or enhanced, depending on the spectral overlap and local distances control between CdSe/CdS QD and Au/Ag bimetallic NPs. Specifically, the as-synthesized Au/Ag NPs significantly quenched the fluorescent emission of CdSe/CdS QD and the quenching effect was enhanced when the plasmonic wavelength of Au/Ag NPs was tuned towards fluorescent emission wavelength of CdSe/CdS QDs. On the contrary, the fluorescent emission of CdSe/CdS QD can be obviously enhanced in the presence of SiO 2 coated Au/Ag NPs with appropriate layer thickness.

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Section: Resultsmentioning

confidence: 99%

One-pot synthesis of Au/Ag bimetallic nanoparticles to modulate the emission of CdSe/CdS quantum dots

et al. 2015

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“…Oleic acid (90%), oleylamine (80%), 1-dodecanol, silver acetate (Ag(ac), 99.5%), and ferric acetylacetonate (Fe(acac) 3 , 99.0%) were purchased from Sigma-Aldrich. All these reagents were used without any further purification.…”

Section: General Materialsmentioning

confidence: 99%

Template-directed Synthesis of Ag₂S-Fe₂O₃ Heterostructures

et al. 2015

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Controlled synthesis of optical-magnetic nanostructures has attracted more and more interest due to their enhanced performance for simultaneous optical applications and magnetic manipulating. Herein, we demonstrated the synthesis of nanocomposites containing silver sulfide and iron oxide materials by the sulfidation of silver-iron oxide nano-templates with elemental sulfur as sulfur resource. In the presence of oleylamine, the sulfidation of silver-iron oxide core-shell nanoparticles followed a "coalescence-fracture-ripening" process just like the reported sulfidation of silver nanoparticles. Meanwhile, while the sulfidation products of silver-iron oxide heteromers retained similar nanostructures as templates, indicating an in-situ sulfidation of silver. These investigations will help us to understand the sulfidation and growth process of silver-containing nanomaterials and control their syntheses for potential applications.

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“…Various experimental conditions were employed using the aforementioned experimental procedure. The corresponding experiments, labeled Exp.#1-5, are summarized in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…Combining noble metal and semiconductors onto a single nanoparticle (NP) can provide not only metal and semiconductor properties, but also novel synergistic functions 1,2) . In the last decade, noble metal/chalcogenide composite NPs such as Au/CdSe 3,4) , Au/Cu 2 S 5) , Ag/Ag 2 S 6) , Au/ Cu 2 ZnSnS 4 7) , Au/Ag 2 S 8) , and Au/CdS 9) with unique properties have been synthesized successfully.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ag/CuInS<sub>2</sub> Core-Shell Nanoparticles

et al. 2017

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In this work, the facile synthesis of Ag/CuInS 2 composite nanoparticles (NPs) with a core-shell structure is demonstrated for the rst time. In our procedure, the pre-formed Ag NPs were subsequently coated with a CuInS 2 shell through the thermal decomposition of the metal thiolate complex. The Ag/CuInS 2 composite NPs took Ag core-CuInS 2 shell structures (Ag@CuInS 2 ) when an oleic acid-oleylamine mixture was used as the co-surfactant. High-resolution transmission electron microscopy (TEM) indicated the epitaxial growth of the CuInS 2 shell on the Ag NPs. In the extinction spectrum of the Ag@CuInS 2 NPs, the localized surface plasmon resonance (LSPR) peak of the Ag core broadened and red-shifted to 2.21 eV, con rming that the LSPR can be tuned by the CuInS 2 shell. Finite-difference time-domain (FDTD) simulations indicated the enhancement of the electric eld in the CuInS 2 shell region and the surface of the Ag@CuInS 2 NPs. This enhancement effect may improve the ef ciency of incident light absorption in CuInS 2 quantum dot sensitized solar cells.

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Noble metal-based composite nanomaterials fabricated via solution-based approaches

Abstract: Recent impressive developments in noble metal-based composite nanomaterials fabricatedviawet chemistry approaches and their catalytic applications are reviewed.

Cited by 104 publications

References 406 publications

One-pot synthesis of Au/Ag bimetallic nanoparticles to modulate the emission of CdSe/CdS quantum dots

One-pot synthesis of Au/Ag bimetallic nanoparticles to modulate the emission of CdSe/CdS quantum dots

Template-directed Synthesis of Ag₂S-Fe₂O₃ Heterostructures

Synthesis of Ag/CuInS<sub>2</sub> Core-Shell Nanoparticles

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Noble metal-based composite nanomaterials fabricated via solution-based approaches

Abstract: Recent impressive developments in noble metal-based composite nanomaterials fabricatedviawet chemistry approaches and their catalytic applications are reviewed.

Cited by 104 publications

References 406 publications

One-pot synthesis of Au/Ag bimetallic nanoparticles to modulate the emission of CdSe/CdS quantum dots

One-pot synthesis of Au/Ag bimetallic nanoparticles to modulate the emission of CdSe/CdS quantum dots

Template-directed Synthesis of Ag2S-Fe2O3 Heterostructures

Synthesis of Ag/CuInS<sub>2</sub> Core-Shell Nanoparticles

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Template-directed Synthesis of Ag₂S-Fe₂O₃ Heterostructures