Wednesday, February 17, 2010

Afterglow Luminescence of Lu2O3:Eu Ceramics Synthesized at Different Atmospheres

Afterglow Luminescence of Lu2O3:Eu Ceramics Synthesized at Different Atmospheres: "The Journal of Physical Chemistry C, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Pyridine on Colloidal Silver. Polarization of Surface Studied by Surface-Enhanced Raman Scattering and Density Functional Theory Methods

Pyridine on Colloidal Silver. Polarization of Surface Studied by Surface-Enhanced Raman Scattering and Density Functional Theory Methods: "The Journal of Physical Chemistry C, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Solution-Based Growth of Monodisperse Cube-Like BaTiO3 Colloidal Nanocrystals

Solution-Based Growth of Monodisperse Cube-Like BaTiO3 Colloidal Nanocrystals: "Chemistry of Materials, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Hydrothermal Yb3+-Doped NaGd(WO4)2 Nano- and Micrometer-Sized Crystals with Preserved Photoluminescence Properties

Hydrothermal Yb3+-Doped NaGd(WO4)2 Nano- and Micrometer-Sized Crystals with Preserved Photoluminescence Properties: "Chemistry of Materials, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Tuesday, February 16, 2010

Fabrication of Ag@SiO2@Y2O3:Er Nanostructures for Bioimaging: Tuning of the Upconversion Fluorescence with Silver Nanoparticles

Fabrication of Ag@SiO2@Y2O3:Er Nanostructures for Bioimaging: Tuning of the Upconversion Fluorescence with Silver Nanoparticles: "Journal of the American Chemical Society, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Optical manipulation of plasmonic nanoparticles, bubble formation and patterning of SERS aggregates

Optical manipulation of plasmonic nanoparticles, bubble formation and patterning of SERS
aggregates
: "Author(s): Zuwei Liu, Wei Hsuan Hung, Mehmet Aykol, David Valley and Stephen B Cronin
Affiliation(s): Department of Physics, University of Southern California, Los Angeles, CA 90089, USA; Department of Materials Science, University of Southern California, Los Angeles, CA 90089, USA; Department of Electrical Engineering, University of Southern California, Los Angeles, CA 90089, USA; Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA"

Sunday, February 14, 2010

Study of tryptophan assisted synthesis of gold nanoparticles by combining UV–Vis, fluorescence, and SERS spectroscopy

Study of tryptophan assisted synthesis of gold nanoparticles by combining UV–Vis, fluorescence, and SERS spectroscopy: "

Abstract We developed a rapid and non-toxic method for the preparation of colloidal gold nanoparticles (GNPs) by using tryptophan (Trp)
as reducing/stabilizing agent. We show that the temperature has a major influence on the kinetics of gold ion reduction and
the crystal growth, higher temperatures favoring the synthesis of anisotropic nanoparticles (triangles and hexagons). The
as-synthesized nanostructures were characterized by UV–Vis absorption spectroscopy, transmission electron microscopy (TEM),
X-ray diffraction (XRD), fluorescence, and surface-enhanced Raman scattering (SERS) spectroscopy. The UV–Vis measurements
confirmed that temperature is a critical factor in the synthesis process, having a major effect on the shape of the synthesized
GNPs. Moreover, fluorescence spectroscopy was able to monitor the quenching of the Trp fluorescence during the in situ synthesis
of GNPs. Using Trp as molecular analyte to evaluate the SERS efficiency of as-prepared GNPs at different temperatures, we
demonstrated that the Raman enhancement of the synthesized gold nanoplates is higher than that of the gold spherical nanoparticles.


  • Content Type Journal Article
  • Category Research Paper
  • DOI 10.1007/s11051-010-9869-6
  • Authors

    • Monica Iosin, Babes-Bolyai University Nanobiophotonics Laboratory, Institute for Interdisciplinary Experimental Research Treboniu Laurian 42 400271 Cluj-Napoca Romania
    • Patrice Baldeck, Université Joseph Fourier, CNRS (UMR5588) Laboratoire de Spectrométrie Physique BP 87 38402 Saint Martin d’Hères France
    • Simion Astilean, Babes-Bolyai University Nanobiophotonics Laboratory, Institute for Interdisciplinary Experimental Research Treboniu Laurian 42 400271 Cluj-Napoca Romania


"

Friday, February 12, 2010

Luminescence Properties of Eu(III) Complex/Polyvinylpyrrolidone Electrospun Composite Nanofibers

Luminescence Properties of Eu(III) Complex/Polyvinylpyrrolidone Electrospun Composite Nanofibers: "The Journal of Physical Chemistry C, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Synthesis of Anisotropic Gold Nanoparticles by Electrospraying into a Reductive-Surfactant Solution

Synthesis of Anisotropic Gold Nanoparticles by Electrospraying into a Reductive-Surfactant Solution: "Chemistry of Materials, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Smart Core−Shell Hybrid Nanogels with Ag Nanoparticle Core for Cancer Cell Imaging and Gel Shell for pH-Regulated Drug Delivery

Smart Core−Shell Hybrid Nanogels with Ag Nanoparticle Core for Cancer Cell Imaging and Gel Shell for pH-Regulated Drug Delivery: "Chemistry of Materials, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Superparamagnetic [gamma]-Fe2O3@SiO2 nanoparticles: a novel support for the immobilization of [VO(acac)2]

Superparamagnetic [gamma]-Fe2O3@SiO2 nanoparticles: a novel support for the immobilization of [VO(acac)2]: "


Clara Pereira, Andre M. Pereira, Pedro Quaresma, Pedro B. Tavares, Eulalia Pereira, Joao P. Araujo, Cristina Freire

(Paper from Dalton Trans.)

Clara Pereira, Dalton Trans., 2010, DOI: 10.1039/b920853d

To cite this article before page numbers are assigned, use the DOI form of citation above.


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Thursday, February 11, 2010

Luminescence in rare earth-doped transparent glass ceramics containing GdF3 nanocrystals for lighting applications

Luminescence in rare earth-doped transparent glass ceramics containing GdF3 nanocrystals for lighting applications: "

Abstract Rare earth ions-doped transparent glass ceramics containing hexagonal GdF3 nanocrystals with a mean size of 16 nm were prepared. Energy dispersive x-ray spectroscopy and luminescence spectrum investigation
evidenced the incorporation of rare earth ions into GdF3 nanocrystals. The efficient energy transfer from Gd3+ to Tb3+ was demonstrated in the Tb3+-doped glass ceramics, which resulted in an intense green light emission originated from Tb3+: 5D4 → 7F6 transition via the sensitization of Gd3+. Compared with the precursor glass, the Dy3+-doped glass ceramic exhibited longer lifetime and lower yellow-to-blue emission intensity ratio owing to the allocation of
Dy3+ ions in the low-phonon-energy GdF3 environment. Under ultraviolet excitation, the Dy3+-doped samples emitted bright white light, indicating their potential application in white light emitting diodes.


  • Content Type Journal Article
  • DOI 10.1007/s10853-010-4266-1
  • Authors

    • Zhifa Shan, Graduate University of Chinese Academy of Sciences State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou Fujian 350002 China
    • Daqin Chen, Graduate University of Chinese Academy of Sciences State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou Fujian 350002 China
    • Yunlong Yu, Graduate University of Chinese Academy of Sciences State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou Fujian 350002 China
    • Ping Huang, Graduate University of Chinese Academy of Sciences State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou Fujian 350002 China
    • Hang Lin, Graduate University of Chinese Academy of Sciences State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou Fujian 350002 China
    • Yuansheng Wang, Graduate University of Chinese Academy of Sciences State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou Fujian 350002 China


"

Symmetry Breaking in Gold−Silica−Gold Multilayer Nanoshells

Symmetry Breaking in Gold−Silica−Gold Multilayer Nanoshells: "ACS Nano, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Thursday, February 04, 2010

Effect of the Interaction between Molecular Exciton and Localized Surface Plasmon on the Spectroscopic Properties of Silver Nanoparticles Coated with Cyanine Dye J-Aggregates

Effect of the Interaction between Molecular Exciton and Localized Surface Plasmon on the Spectroscopic Properties of Silver Nanoparticles Coated with Cyanine Dye J-Aggregates: "The Journal of Physical Chemistry C, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Controlled Synthesis of Uniform Silver Nanospheres†

Controlled Synthesis of Uniform Silver Nanospheres†: "The Journal of Physical Chemistry C, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Controlled Fabrication of BiFeO3 Uniform Microcrystals and Their Magnetic and Photocatalytic Behaviors

Controlled Fabrication of BiFeO3 Uniform Microcrystals and Their Magnetic and Photocatalytic Behaviors: "The Journal of Physical Chemistry C, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Chemical Synthesis and Structural and Magnetic Properties of Dispersible Cobalt- and Nickel-Doped ZnO Nanocrystals

Chemical Synthesis and Structural and Magnetic Properties of Dispersible Cobalt- and Nickel-Doped ZnO Nanocrystals: "The Journal of Physical Chemistry C, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Synthesis and Photoluminescence Characteristics of High Color Purity and Brightness Li3Ba2Gd3(MoO4)8:Eu3+ Red Phosphors

Synthesis and Photoluminescence Characteristics of High Color Purity and Brightness Li3Ba2Gd3(MoO4)8:Eu3+ Red Phosphors: "The Journal of Physical Chemistry C, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Encapsulation and Stabilization of Gold Nanoparticles with “Click” Polyethyleneglycol Dendrimers

Encapsulation and Stabilization of Gold Nanoparticles with “Click” Polyethyleneglycol Dendrimers: "Journal of the American Chemical Society, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Topotactic Reduction of YBaCo2O5 and LaBaCo2O5: Square-Planar Co(I) in an Extended Oxide

Topotactic Reduction of YBaCo2O5 and LaBaCo2O5: Square-Planar Co(I) in an Extended Oxide: "Journal of the American Chemical Society, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Intracellular Delivery of a Membrane-Impermeable Enzyme in Active Form Using Functionalized Gold Nanoparticles

Intracellular Delivery of a Membrane-Impermeable Enzyme in Active Form Using Functionalized Gold Nanoparticles: "Journal of the American Chemical Society, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Phase Perfection in Zinc Blende and Wurtzite III−V Nanowires Using Basic Growth Parameters

Phase Perfection in Zinc Blende and Wurtzite III−V Nanowires Using Basic Growth Parameters: "Nano Letters, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Direct Measure of Strain and Electronic Structure in GaAs/GaP Core−Shell Nanowires

Direct Measure of Strain and Electronic Structure in GaAs/GaP Core−Shell Nanowires: "Nano Letters, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Wednesday, February 03, 2010

Silver Nanocrystals: Self-Organization and Collective Properties

Silver Nanocrystals: Self-Organization and Collective Properties: "The Journal of Physical Chemistry C, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Preparation and Physicochemical Characteristics of Luminescent Apatite-Based Colloids

Preparation and Physicochemical Characteristics of Luminescent Apatite-Based Colloids: "The Journal of Physical Chemistry C, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

CdSe/ZnS Core/Shell Quantum Dot Sensitization of Low Index TiO2 Single Crystal Surfaces

CdSe/ZnS Core/Shell Quantum Dot Sensitization of Low Index TiO2 Single Crystal Surfaces: "Journal of the American Chemical Society, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Effects of Ce3+ Codoping and Annealing on Phase Transformation and Luminescence of Eu3+-Doped YPO4 Nanorods: D2O Solvent Effect

Effects of Ce3+ Codoping and Annealing on Phase Transformation and Luminescence of Eu3+-Doped YPO4 Nanorods: D2O Solvent Effect: "Journal of the American Chemical Society, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Synthesis and optical characteristics of organic light-emitting dot based on well-defined octa-functionalized silsesquioxane

Synthesis and optical characteristics of organic light-emitting dot based on well-defined octa-functionalized silsesquioxane: "

Abstract This article reports the synthesis and characterization of a quantum-confined luminescent dot with size 2–3 nm using well-defined
m-octa(bromophenyl) silsesquioxane (m-OBPS) as core. The highly regioselective bromination of octaphenylsilsesquioxane (OPS), which is an electron-deficient nanometer-sized
molecule, has been synthesized using combined catalyst of iodine and zinc chloride at room temperature in dichloromethane
solvent. Based on m-OBPS, a hybrid luminescent dot with well-defined structure was synthesized. UV absorption and PL spectra of this light-emitting
dot remain same in dilute solution, condensed state, and solid solution. Furthermore, time-resolved PL study indicates that
the exciton decay time of the light-emitting dot remains similar regardless in dilute solution, condensed state, or blended
with other polymers, suggesting that the charge carriers are well confined within the individual light-emitting dot due to
the unique star-like structure and shielding alkyl chain layer. The light-emitting nano-particles can be considered as isolated
chromophores as both inter- and intra- molecular aggregation are prohibited.


  • Content Type Journal Article
  • Category Research Paper
  • DOI 10.1007/s11051-010-9857-x
  • Authors

    • Yang Xiao, Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) 3 Research Link Singapore 117602 Singapore
    • Xuehong Lu, Nanyang Technological University School of Materials Science and Engineering 50 Nanyang Avenue Singapore 639798 Singapore
    • Xinhai Zhang, Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) 3 Research Link Singapore 117602 Singapore
    • Chaobin He, Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) 3 Research Link Singapore 117602 Singapore


"

Tuesday, January 26, 2010

Light Emitting Diode Irradiation Can Control the Morphology and Optical Properties of Silver Nanoparticles

Light Emitting Diode Irradiation Can Control the Morphology and Optical Properties of Silver Nanoparticles: "Journal of the American Chemical Society, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Orange−Blue−Orange Triblock One-Dimensional Heterostructures of Organic Microrods for White-Light Emission

Orange−Blue−Orange Triblock One-Dimensional Heterostructures of Organic Microrods for White-Light Emission: "Journal of the American Chemical Society, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Direct Synthesis of Water-Soluble Ultrathin CdS Nanorods and Reversible Tuning of the Solubility by Alkalinity

Direct Synthesis of Water-Soluble Ultrathin CdS Nanorods and Reversible Tuning of the Solubility by Alkalinity: "Journal of the American Chemical Society, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Escherichia coli Bacteria-Templated Synthesis of Nanoporous Cadmium Sulfide Hollow Microrods for Efficient Photocatalytic Hydrogen Production

Escherichia coli Bacteria-Templated Synthesis of Nanoporous Cadmium Sulfide Hollow Microrods for Efficient Photocatalytic Hydrogen Production: "The Journal of Physical Chemistry C, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Monday, January 25, 2010

Nanostructured Magnonic Crystals with Size-Tunable Bandgaps

Nanostructured Magnonic Crystals with Size-Tunable Bandgaps: "ACS Nano, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Water-Soluble Fluorescent Silver Nanoclusters

Water-Soluble Fluorescent Silver Nanoclusters: "Ag nanoclusters consist of several to roughly a hundred atoms and possess sizes comparable to the Fermi wavelength of electrons; they exhibit molecule-like properties, including discrete electronic transitions and strong fluorescence. These nanoclusters are of significant interest because they provide the bridge between atomic and nanoparticle behavior in noble metals. Since the first observations of photoluminescence from Ag nanoclusters, substantial effort has been made to prepare Ag nanoclusters and explore their potential applications. The synthesis of well-defined Ag nanoclusters, however, is difficult due to aggregation of nanoclusters, especially in aqueous solutions. In this Research News article, we highlight some recent progress on solution-based synthesis of water-soluble Ag nanoclusters using radiolytic, chemical reduction and photochemical approaches to prepare fluorescent Ag nanoclusters."

Near-infrared photocatalysis based on YF3:Yb3+,Tm3+/TiO2 core/shell nanoparticles

Near-infrared photocatalysis based on YF3:Yb3+,Tm3+/TiO2 core/shell nanoparticles: "


Weiping Qin, Daisheng Zhang, Dan Zhao, Lili Wang, Kezhi Zheng

(Communication from Chem. Commun.)

Weiping Qin, Chem. Commun., 2010, DOI: 10.1039/b924052g

To cite this article before page numbers are assigned, use the DOI form of citation above.


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Plasmon Coupling in Two-Dimensional Arrays of Silver Nanoparticles: II. Effect of the Particle Size and Interparticle Distance†

Plasmon Coupling in Two-Dimensional Arrays of Silver Nanoparticles: II. Effect of the Particle Size and Interparticle Distance†: "The Journal of Physical Chemistry C, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Investigation of Hydrogen Storage Capabilities of ZnO-Based Nanostructures

Investigation of Hydrogen Storage Capabilities of ZnO-Based Nanostructures: "The Journal of Physical Chemistry C, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."

Melting Characteristics of Superlattices of Alkanethiol-Capped Gold Nanoparticles: The “Excluded” Story of Excess Thiol

Melting Characteristics of Superlattices of Alkanethiol-Capped Gold Nanoparticles: The “Excluded” Story of Excess Thiol: "Chemistry of Materials, Volume 0, Issue 0, Articles ASAP (As Soon As Publishable)."