Probing the Wave Function Delocalization in CdSe/CdS Dot-in-Rod Nanocrystals by Time- and Temperature-Resolved Spectroscopy

Probing the Wave Function Delocalization in CdSe/CdS Dot-in-Rod Nanocrystals by Time- and Temperature-Resolved Spectroscopy: "

ACS Nano

DOI: 10.1021/nn2005969

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Correlated Structure and Optical Property Studies of Plasmonic Nanoparticles

Correlated Structure and Optical Property Studies of Plasmonic Nanoparticles: "

The Journal of Physical Chemistry C

DOI: 10.1021/jp2010309

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Rare Earth Hexaboride Nanowires: General Synthetic Design and Analysis Using Atom Probe Tomography

Rare Earth Hexaboride Nanowires: General Synthetic Design and Analysis Using Atom Probe Tomography: "

Chemistry of Materials

DOI: 10.1021/cm200258h

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Highly Magnetic Core–Shell Nanoparticles with a Unique Magnetization Mechanism

Highly Magnetic Core–Shell Nanoparticles with a Unique Magnetization Mechanism: "

The potent core: A new approach to preparing highly magnetic nanoparticles consisting of a ferromagnetic core (Fe) and an artificial ferrite shell was developed. The monometallic core contributes to high overall magnetization. The superparamagnetic ferrite shell protects the core against oxidation and further increases magnetization while minimizing particle aggregation.

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Fluorescent magnetic nanoparticles for biomedical applications

Fluorescent magnetic nanoparticles for biomedical applications: "


Silica and carboxymethyl chitosan-coated magnetic [gamma]-Fe2O3nanoparticles with bound fluorescein labeled rat mesenchymal stem cells; both magnetic resonance and fluorescent imaging of a rat brain with implanted cells were performed.
Nataliya Chekina, Daniel Horak, Pavla Jendelova, Miroslava Trchova, Milan J. Benes, Martin Hruby, Vit Herynek, Karolina Turnovcova, Eva Sykova

( from J. Mater. Chem.)

Nataliya Chekina, J. Mater. Chem., 2011, DOI: 10.1039/C1JM10621J

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Magnetic Nanoparticles: A Versatile Method for the Reductive, One-Pot Synthesis of Bare, Hydrophilic and Hydrophobic Magnetite Nanoparticles (Adv. Funct. Mater. 8/2011)

Magnetic Nanoparticles: A Versatile Method for the Reductive, One-Pot Synthesis of Bare, Hydrophilic and Hydrophobic Magnetite Nanoparticles (Adv. Funct. Mater. 8/2011): "

Abstract

A biocompatible, reliable, and particularly versatile synthesis of magnetic iron oxide nanoparticles (IONPs) is presented that uses iron(III) acetylacetonate Fe(acac)₃ as an iron precursor and sodium borohydride as a reducing agent. Both the reaction temperature and the concentration of the reducing agent have considerable effects on the IONP size. These dependencies can be used to prepare IONPs ranging in size from 5 to 8 nm, as determined by transmission electron microscopy (TEM). Synthesis at room temperature or with higher sodium borohydride concentrations always resulted in smaller particle sizes. Powder X-ray diffraction patterns show the presence of an iron oxide phase with a cubic unit cell and allow for the determination of the lattice parameters and average crystallite sizes for all synthesized IONPs. Transmission Mössbauer spectroscopy shows that the as-synthesized IONPs are pure magnetite (Fe₃O₄) and is further used to elucidate the reaction pathway by analyzing iron intermediates formed prior to nanoparticle formation and precipitation. TEM and high-resolution TEM reveal quasi-spherical shapes and lattice fringes for most IONPs. With only minor modifications of the synthesis procedure, this versatile, one-pot synthesis is proven to be suitable for the production of bare (uncoated) IONPs, IONPs with hydrophilic poly(ethylene glycol), L-arginine, and L-glutamic acid coatings, as well as IONPs with hydrophobic coatings such as oleic acid. All coated IONPs were characterized by FT-IR spectroscopy. In addition, the bare IONPs could easily be modified post-synthesis with a suitable capping agent using ultrasonication. To verify the biocompatibility of the IONPs, in vitro cytotoxicity studies were carried out on bare IONPs with intestinal (Caco2) and liver epithelial (HepG2) cell cultures using an 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Phase contrast microscopy after hematoxylin-eosin staining showed the intact morphology of the Caco2 and HepG2 cells treated with IONPs.

The fast, biocompatible, and versatile synthesis of magnetite nanoparticles is presented by Torsten Hegmann and co-workers, on page 1457. The nanoparticles can be synthesized in bare (uncoated) form, ready for subsequent monolayer capping steps, or coated in situ with hydropho-bic or hydrophilic capping agents. The image shows the starting material in solution and the nanoparticle product attracted to the flask's inner wall by rare earth magnets in front of a transmission electron microscopy background image featuring bare magnetite nanoparticles. (Image design: V. Yathindranath and T. Hegmann)

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Fluorescent Metal Nanoshells: Lifetime-Tunable Molecular Probes in Fluorescent Cell Imaging

Fluorescent Metal Nanoshells: Lifetime-Tunable Molecular Probes in Fluorescent Cell Imaging: "

The Journal of Physical Chemistry C

DOI: 10.1021/jp111475y

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Photoluminescent Lanthanide-Doped Silica Nanotubes: Sol−Gel Transcription from Functional Template

Photoluminescent Lanthanide-Doped Silica Nanotubes: Sol−Gel Transcription from Functional Template: "

The Journal of Physical Chemistry C

DOI: 10.1021/jp200515s

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Colloidal Gallium Indium Oxide Nanocrystals: A Multifunctional Light-Emitting Phosphor Broadly Tunable by Alloy Composition

Colloidal Gallium Indium Oxide Nanocrystals: A Multifunctional Light-Emitting Phosphor Broadly Tunable by Alloy Composition: "

Journal of the American Chemical Society

DOI: 10.1021/ja111514u

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Composition and Phase Tuned InGaAs Alloy Nanowires

Composition and Phase Tuned InGaAs Alloy Nanowires: "

The Journal of Physical Chemistry C

DOI: 10.1021/jp2003276

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Colloidal Gallium Indium Oxide Nanocrystals: A Multifunctional Light-Emitting Phosphor Broadly Tunable by Alloy Composition

Colloidal Gallium Indium Oxide Nanocrystals: A Multifunctional Light-Emitting Phosphor Broadly Tunable by Alloy Composition: "

Journal of the American Chemical Society

DOI: 10.1021/ja111514u

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New insight into the soot nanoparticles in a candle flame

New insight into the soot nanoparticles in a candle flame: "


All four carbon forms, nanodiamond, graphite, fullerene and amorphous particles, are detected in a candle flame.
Zixue Su, Wuzong Zhou, Yang Zhang

( from Chem. Commun.)

Zixue Su, Chem. Commun., 2011, DOI: 10.1039/C0CC05785A

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Facile Synthesis of Monodisperse Porous ZnO Spheres by a Soluble Starch-Assisted Method and Their Photocatalytic Activity

Facile Synthesis of Monodisperse Porous ZnO Spheres by a Soluble Starch-Assisted Method and Their Photocatalytic Activity: "

The Journal of Physical Chemistry C

DOI: 10.1021/jp110256s

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Epitaxial Growth of Au@Ni Core−Shell Nanocrystals Prepared Using a Two-Step Reduction Method

Epitaxial Growth of Au@Ni Core−Shell Nanocrystals Prepared Using a Two-Step Reduction Method: "

Crystal Growth & Design

DOI: 10.1021/cg200199b

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Synthesis conditions, light intensity and temperature effect on the performance of ZnO nanorods-based Dye sensitized solar cells

Synthesis conditions, light intensity and temperature effect on the performance of ZnO nanorods-based Dye sensitized solar cells: "Publication year: 2011
Source: Journal of Power Sources, In Press, Accepted Manuscript, Available online 6 April 2011
Irene, Gonzalez-Valls , Youhai, Yu , Belén, Ballesteros , Judith, Oro , Monica, Lira-Cantu
We present in this work a careful study of the different parameters affecting vertically-aligned ZnO-nanorods (NRs) based Dye sensitized solar cells (DSCs). We analyze the effect of synthesis conditions, light intensity, UV light and working temperature, and correlated them to the final photovoltaic properties of the DSC. Although similar studies can be found in the literature for DSCs based on TiO2, this work is, to our knowledge, the first detailed study carried out for DSC based on vertically-aligned ZnO nanorods. The ZnO NRs were grown between 1.6 and 5.2μm long. Electrodes made with 1.6±0.2μm thickness were used to analyze parameters..."

Size-Tunable, Bright, and Stable PbS Quantum Dots: A Surface Chemistry Study

Size-Tunable, Bright, and Stable PbS Quantum Dots: A Surface Chemistry Study: "

ACS Nano

DOI: 10.1021/nn103050w

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Size Dependence of the Multiple Exciton Generation Rate in CdSe Quantum Dots

Size Dependence of the Multiple Exciton Generation Rate in CdSe Quantum Dots: "

ACS Nano

DOI: 10.1021/nn200141f

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Selective homoepitaxial growth and luminescent properties of ZnO nanopillars

Selective homoepitaxial growth and luminescent properties of ZnO nanopillars: "Author(s): V Khranovskyy, I Tsiaoussis, L Hultman and R Yakimova
Affiliation(s): Department of Physics, Chemistry and Biology, Linkoping University, Sweden; Aristotle University of Thessaloniki, Thessaloniki, Greece"

Magnetic Core−Shell Nanoparticles from Nanoscale-Induced Phase Segregation

Magnetic Core−Shell Nanoparticles from Nanoscale-Induced Phase Segregation: "

Chemistry of Materials

DOI: 10.1021/cm200575g

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The Multistrata Nanoparticle: an FeOx/Au Core/Shell Enveloped in a Silica–Au Shell

The Multistrata Nanoparticle: an FeOx/Au Core/Shell Enveloped in a Silica–Au Shell: "

The multistrata nanoparticle is the culmination of tunable, dual-peak, UV–vis–NIR spectrum extinction characteristics, trimodal imaging contrast, simple synthesis, and facile surface modification capabilities into a single <60 nm diameter, novel, multifunctional, multilayered nanosphere that seeks to relieve current methodological limitations by coupling diagnostics and therapeutics into one single theranostic tool.

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