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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Journal ArticleDOI
From core/shell to hollow Fe/γ-Fe₂O₃ nanoparticles: evolution of the magnetic behavior.
Zohreh Nemati,Hafsa Khurshid,Javier Alonso,Manh-Huong Phan,Pritish Mukherjee,Hariharan Srikanth +5 more
TL;DR: There is a general trend for both systems that as the morphology changes from core/shell to core/void/shell, the magnetization of the system decays and inter-particle interactions become weaker, while the effective anisotropy and the EB effect increase.
Journal ArticleDOI
Enhanced visible photocatalytic activity of hybrid Pt/α-Fe2O3 nanorods
TL;DR: In this article, the performance of hybrid Pt/α-Fe2O3 nanorods with highly defective surfaces was investigated by X-ray photoelectron spectroscopy spectra.
Journal ArticleDOI
Nafion stabilized ibuprofen–gold nanostructures modified screen printed electrode as arsenic(III) sensor
Syeda Sara Hassan,Syeda Sara Hassan,Sirajuddin,Amber R. Solangi,Tasneem Gul Kazi,Muhammad Siddique Kalhoro,Yasmeen Junejo,Zulfiqar Ali Tagar,Nazar Hussain Kalwar +8 more
TL;DR: In this article, a time dependant synthesis of ibuprofen derived gold nanoflowers/nanotructures (Ibu-AuPNFs/IbuAuNSs) was carried out via heating the mixture of ibruprofen and gold chloride (HAuCl4) at constant temperature.
Journal ArticleDOI
The effect of Au domain size on the CO oxidation catalytic activity of colloidal Au–FeOx dumbbell-like heterodimers
Sharif Najafishirtari,Pablo Guardia,Alice Scarpellini,Mirko Prato,Sergio Marras,Liberato Manna,Massimo Colombo +6 more
TL;DR: Au@FeOx dumbbell nanocrystals (NCs) with different sizes of the Au domain (i.e. 4nm, 6nm and 10nm) were successfully synthesized by means of a colloidal synthesis procedure as discussed by the authors.
Journal ArticleDOI
Pt nanocrystal evolution in the presence of Au(III)-salts at room temperature: spontaneous formation of AuPt heterodimers
Stephanie I. Lim,Miriam Varón,Isaac Ojea-Jiménez,Jordi Arbiol,Jordi Arbiol,Víctor F. Puntes,Víctor F. Puntes +6 more
TL;DR: The role of oleylamine and Pt NCs in the reduction and nucleation of Au has been investigated in this article, where the synthesis was conducted at room temperature, which enabled the heterodimer growth to progress at a slower rate and thus allowed monitoring of the Au nucleation process.
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.