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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Surface modification and cellular uptake evaluation of Au-coated Ni80Fe20 nanodiscs for biomedical applications.
Gabriele Barrera,Loredana Serpe,Federica Celegato,Marco Coїsson,Katia Martina,Roberto Canaparo,Paola Tiberto +6 more
TL;DR: A successful attempt to bind cysteine-fluorescein isothiocyanate (FITC) derivative to the gold surface of magnetic NDs has been exploited to verify the intracellular uptake of the NDs by cytofluorimetric analysis using the FITC conjugate.
Journal ArticleDOI
Spatial Confinement of Enzyme and Nanozyme in Silica-Based Hollow Microreactors.
TL;DR: A facile route to encapsulate glucose oxidase (GOx) and poly(ethylenimine) ( PEI) conjugated magnetite nanoparticles (Fe3O4-PEI) in the hollow interior of hybrid microreactors is reported, suggesting that the confined space in the micro Reactors allows the tandem reactions of GOx and Fe3O 4- PEI to take place in close proximity leading to an improved overall activity.
Journal ArticleDOI
The growth of metal sulfide–Au/Ag nanocomposites in a nonpolar organic solvent
TL;DR: In this paper, a number of characterization techniques, including transmission electron microscopy (TEM), high-resolution TEM (HRTEM), HRTEM, high-angle annular dark-field scanning (HAADF-STEM), X-ray diffraction (XRD) and energy-dispersive Xray spectroscopy (EDX) are used to characterize the morphology of the formed nanocomposites, and to address the following critical issues: i) the deposition behavior of the noble metals on the semiconductor nanocrystals; ii) the
Journal ArticleDOI
Controlling the Morphology of Au-Pd Heterodimer Nanoparticles by Surface Ligands.
Martin Kluenker,Bethany M. Connolly,Bethany M. Connolly,David M. Marolf,David M. Marolf,Muhammad Nawaz Tahir,Karsten Korschelt,Paul Simon,Uta Köhler,Sergi Plana-Ruiz,Sergi Plana-Ruiz,Sergi Plana-Ruiz,Bastian Barton,Bastian Barton,Martin Panthöfer,Ute Kolb,Ute Kolb,Wolfgang Tremel +17 more
TL;DR: A facile synthesis for Au@Pd and Pd@Au heterodimer nanoparticles (NPs) with morphologies ranging from segregated domains (heteroparticles) to core-shell structures by applying a seed-mediated growth process with Au and PD seed nanoparticles in 1-octadecene (ODE), which is a high-boiling organic solvent.
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.
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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.