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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Magnetically recoverable magnetite/gold catalyst stabilized by poly(N-vinyl-2-pyrrolidone) for aerobic oxidation of alcohols.
TL;DR: Fe3O4:PVP/Au nanocomposite synthesized via a two-step procedure was tested as a quasi-homogenous alcohol oxidation catalyst and shows rapid magnetic recoverability and reusability characteristics.
Journal ArticleDOI
Star-Shaped Magnetic-Plasmonic Au@Fe3O4 Nano-Heterostructures for Photothermal Therapy
B.J. Muzzi,Martin Albino,Alessio Gabbani,Alexander Omelyanchik,Elena Kozenkova,Michele Petrecca,Claudia Innocenti,Elena Balica,Alessandro Lavacchi,Francesca Scavone,Cecilia Anceschi,Gaia Petrucci,Alfonso Ibarra,Anna Laurenzana,Francesco Pineider,Valeria Rodionova,Claudio Sangregorio +16 more
TL;DR: In this article , an advanced electron microscopy characterization allows assessing the multifaceted nature of the Au core and its role in the growth of the peculiar epitaxial star-like shell with excellent crystallinity and homogeneity.
Journal ArticleDOI
Metal-support interaction in catalysis: The influence of the morphology of a nano-oxide domain on catalytic activity
Sharif Najafishirtari,Clara Guglieri,Sergio Marras,Alice Scarpellini,Rosaria Brescia,Mirko Prato,Giulia Righi,Anna Franchini,Rita Magri,Liberato Manna,Massimo Colombo +10 more
TL;DR: In this article, the authors used wet chemistry synthesis methods to prepare nanodumbbell structures as a model oxide supported metal catalyst and found that increasing the number of nanocrystals with hollow oxide domains resulted in a decrease in catalytic activity.
Journal ArticleDOI
Controlled deposition of ultra-small Ag particles on TiO2 nanorods: oxide/metal hetero-nanostructures with improved catalytic activity
TL;DR: In this paper, the authors synthesize controllable Ag particle numbers and domain size by in situ reduction of silver acetate and further growth of Ag on TiO2 nanorods.
Journal ArticleDOI
Synthesis of different nanostructured flower-like iron oxides and study of their performance as adsorbent
Maryam Khosravi,Saeid Azizian +1 more
TL;DR: In this paper, the effect of reaction time (reflux time) and the calcination conditions on the morphology and composition of prepared iron oxides were investigated, and the results showed that the prepared nanostructured iron oxide can be used as adsorbent for rapid removal of dye pollutants from water.
References
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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.