Journal ArticleDOI
Dumbbell-like Bifunctional Au−Fe3O4 Nanoparticles
TLDR
The dumbbell is formed through epitaxial growth of iron oxide on the Au seeds, and the growth can be affected by the polarity of the solvent, as the use of diphenyl ether results in flower-like Au-Fe(3)O(4) nanoparticles.Abstract:
Dumbbell-like Au−Fe3O4 nanoparticles are synthesized using decomposition of Fe(CO)5 on the surface of the Au nanoparticles followed by oxidation in 1-octadecene solvent. The size of the particles is tuned from 2 to 8 nm for Au and 4 nm to 20 nm for Fe3O4. The particles show the characteristic surface plasmon absorption of Au and the magnetic properties of Fe3O4 that are affected by the interactions between Au and Fe3O4. The dumbbell is formed through epitaxial growth of iron oxide on the Au seeds, and the growth can be affected by the polarity of the solvent, as the use of diphenyl ether results in flower-like Au−Fe3O4 nanoparticles.read more
Citations
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Ternary asymmetric particles with controllable patchiness.
TL;DR: This work demonstrated a facile approach to the fabrication of the ternary asymmetric silica particles that consisted of different components on the opposite poles, such as metal or fluorescent quantum dots, with the aid of the mask-unmask method and double-sided etching and modifying.
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From Molecular-Level Organization to Nanoscale Positioning: Synergetic Ligand Effect on the Synthesis of Hybrid Nanostructures
TL;DR: In this paper, a combined experimental and theoretical study employing multiscale simulations and shows how molecular information encoded on particle surface can be transferred into distinct composite patterns, and the emergence of different HNs is found to be not only related to ligand binding strengths affecting the reaction kinetics but also the ligand-ligand interactions responsible for phase segregation.
Journal ArticleDOI
Functionalization of Cobalt Ferrite Nanoparticles by a Vitamin C-assisted Covering with Gold
Arūnas Jagminas,Kęstutis Mažeika,Rokas Kondrotas,Marija Kurtinaitienė,Aldona Jagminienė,Agnė Mikalauskaitė +5 more
TL;DR: In this article, the authors report the design and methodology for functionalization of the surface of small Co-ferrite nanoparticles with a mean size of up to 5.0 nm through the attachment of vitamin C molecules.
Journal ArticleDOI
Catalytic activity of Au@Cu2O core-shell nanostructure for the organic pollutant remediation
Satyaranjan Jena,M. B. Bhavya,Sai Rashmi Manippady,Prangya Bhol,Swarnalata Swain,Manav Saxena,Pramila K. Misra,Akshaya K. Samal +7 more
TL;DR: In this paper, gold-copper oxide (Au@Cu2O) core-shell nanostructures were studied for catalytic activity for the degradation of dyes such as crystal violet (CV) and congo red (CR) and the reduction of organic pollutant, 4-nitrophenol (4-NP) to 4-aminophenol(4-AP) and compared with monometallic Au NPs.
Journal ArticleDOI
A study of charge transfer mechanism and optical properties of Au–CdS core–shell nanocrystals
TL;DR: In this article, the enhancement in band edge photoluminescence intensity and Purcell factor associated with red shift in PL features is observed in chemically prepared Au-CdS core-shell nanocrystals.
References
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Gold nanoparticles: assembly, supramolecular chemistry, quantum-size-related properties, and applications toward biology, catalysis, and nanotechnology.
TL;DR: A review of gold nanoparticles can be found in this article, where the most stable metal nanoparticles, called gold colloids (AuNPs), have been used for catalysis and biology applications.
Journal ArticleDOI
Monodisperse MFe2O4 (M = Fe, Co, Mn) Nanoparticles
Shouheng Sun,Hao Zeng,David B. Robinson,Simone Raoux,Philip M. Rice,Shan X. Wang,Guanxiong Li +6 more
TL;DR: As-synthesized iron oxide nanoparticles have a cubic spinel structure as characterized by HRTEM, SAED, and XRD and can be transformed into hydrophilic ones by adding bipolar surfactants, and aqueous nanoparticle dispersion is readily made.
Journal ArticleDOI
Nanoparticles with Raman Spectroscopic Fingerprints for DNA and RNA Detection
TL;DR: Six dissimilar DNA targets with six Raman-labeled nanoparticle probes were distinguished, as well as two RNA targets with single nucleotide polymorphisms, and the current unoptimized detection limit of this method is 20 femtomolar.
Journal ArticleDOI
Novel Gold Catalysts for the Oxidation of Carbon Monoxide at a Temperature far Below 0 °C
TL;DR: In this article, a variety of gold catalysts are used to catalyze the oxidation of carbon monoxide at temperatures as low as −70 °C and are stable in a moistened gas atmosphere.
Journal ArticleDOI
Epitaxial Growth of Highly Luminescent CdSe/CdS Core/Shell Nanocrystals with Photostability and Electronic Accessibility
TL;DR: The synthesis of epitaxially grown, wurtzite CdSe/CdS core/shell nanocrystals is reported in this paper, where shells of up to three monolayers in thickness were grown on cores ranging in diameter from 23 to 39.