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Polymer micro- and nano-fibers, made of organic light-emitting materials with optical gain, show interesting lasing properties. Fibers with diameters from few tens of nm to few microns can be fabricated by electrospinning, a method based on…

Materials Science · Physics 2013-12-02 Andrea Camposeo , Luana Persano , Dario Pisignano

In 1987-89 were synthesized soluble nano-composites of polyacetylene (NPA) with an abnormally high intensity of Raman scattering and high stability under laser radiation. Here we demonstrate that the key pre-condition to the outstanding…

Materials Science · Physics 2007-05-23 Valerii M. Kobryanskii

A novel type of hybrid colloids is presented, based on the association of several polymeric systems and ferrofluids. On the one hand, we use inorganic nanoparticles made of magnetic iron oxide prepared at the LI2C, which response to a…

We are presenting a new method of processing polystyrene-silica nanocomposites, which results in a very well-defined dispersion of small primary aggregates (assembly of 15 nanoparticles of 10 nm diameter) in the matrix. The process is based…

Materials Science · Physics 2009-04-02 Nicolas Jouault , Perrine Vallat , Florent Dalmas , Sylvère Said , Jacques Jestin , François Boué

We report on self-assembled iron oxide nanoparticle films on silicon substrates. In addition to homogeneously assembled layers, we fabricated patterned trenches of 40-1000 nm width using electron beam lithography for the investigation of…

Mesoscale and Nanoscale Physics · Physics 2010-10-21 M. J. Benitez , P. Szary , D. Mishra , M. Feyen , A. H. Lu , O. Petracic , H. Zabel

Polystyrene-based phosphorene nanocomposites were prepared by a solvent blending procedure allowing the embedding of black phosphorus (BP) nanoflakes in the polymer matrix. Raman spectroscopy, X Ray Diffraction and TEM microscopy were…

A number of metal-based nanopowders such kinds as Fe, Co, Fe/Co alloy, Fe/C, Fe/organic shell were successfully produced by aerosol synthesis method. The mechanism of nanoparticles formation and the influence of experimental parameters on…

Materials Science · Physics 2007-08-13 E. S. Vasilieva , O. V. Tolochko , V. E. Yudin , D. Kim , D. -W. Lee

Designable media can control properties of nanocomposite materials by spatially organizing nanoparticles. Here we theoretically study particle organization by ultrathin polymer films of grafted chains (``brushes''). Polymer-soluble…

Soft Condensed Matter · Physics 2009-11-07 Jaeup U. Kim , Ben O'Shaughnessy

The authors report on the realization of ordered arrays of light-emitting conjugated polymer nanofibers by near-field electrospinning. The fibers, made by poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene], have diameters of few…

Light emitting electrospun nanofibers of poly-[(9,9-dioctylfluorenyl-2,7-diyl)-co-(N,N'-diphenyl)-N,N'-di(p-butyl-oxy-phenyl)-1,4-diaminobenzene)] (PFO-PBAB) are produced by electrospinning under different experimental conditions. In…

Materials Science · Physics 2013-09-04 Vito Fasano , Alessandro Polini , Giovanni Morello , Maria Moffa , Andrea Camposeo , Dario Pisignano

The free standing solid polymer nanocomposite films has been prepared through standard solution cast technique. The improvement in structural, microstructural and electrochemical properties has been observed on the dispersion of nanofiller…

Materials Science · Physics 2018-07-16 Anil Arya , A. L. Sharma

When polyelectrolyte-neutral block copolymers are mixed in aqueous solutions with oppositely charged species, stable complexes are found to form spontaneously. The mechanism is based on electrostatics, and on the compensation between the…

Single-crystal nanoparticles of silicon, several tens of nm in diameter, may be suitable as building blocks for single-nanoparticle electronic devices. Previous studies of nanoparticles produced in low-pressure plasmas have demonstrated the…

Ordering nanoparticles into a desired super-structure is often crucial for their technological applications. We use molecular dynamics simulations to study the assembly of nanoparticles in a polymer brush randomly grafted to a planar…

Soft Condensed Matter · Physics 2017-12-11 Shengfeng Cheng , Mark J. Stevens , Gary S. Grest

Ordered binary and ternary photonic crystals, composed of different sized polymer-composite spheres with diameter ratios up to 120%, are generated using bending induced oscillatory shearing (BIOS). This viscoelastic system creates…

Mesoscale and Nanoscale Physics · Physics 2016-05-10 Qibin Zhao , Chris E. Finlayson , Christian Schafer , Peter Spahn , Markus Gallei , Lars Herrmann , Andrei Petukhov , Jeremy J. Baumberg

In this work, 6 to 12 nm iron oxide nanoparticles were synthesized and coated with poly(acrylic acid) chains of molecular weight 2100 g/mol. Based on a quantitative evaluation of the dispersions, the bare and coated particles were…

Materials Science · Physics 2012-12-10 J. Fresnais , M. Yan , J. Courtois , T. Bostelmann , A. Bée , J. -F. Berret

Polynorbornene-based decomposable polymer which can be patterned with ultraviolet or electron-beam radiation is used to create micrometer-scale fluidic channels. Silicon nitride substrates are used to fabricate nanophotonic wavegide and…

Optics · Physics 2015-03-10 Ehsan Shah Hosseini , Mehrsa Raeis Zadeh , Paul Kohl , Ali Adibi

In present study we exploited Langmuir technique to produce self-assembled arrays composed of monodisperse iron oxide nanoparticles 10 nm and 20 nm in diameter and of their binary mixture. A combination of in-situ X-ray reflectometry and…

Soft Condensed Matter · Physics 2019-01-28 V. Ukleev , A. Khassanov , I. Snigireva , O. Konovalov , M. Dudnik , I. Dubitskiy , A. Vorobiev

Polymer assisted spherical FeNi nanoparticles were prepared via wet chemical method using hydrazine as a reducing agent and polymers (PVP and PEG) as reducing and stabilizing agent. Structural studies performed using XRD and TEM shows…

Materials Science · Physics 2012-12-17 S. K. Karna , S. R. Mishra , E. Gunapala , I. Dubenko , V. Malagareddy , G. K. Marasinghe , N. Ali

The quantum dots of semiconductor display novel and interesting phenomena that have not been in the bulk material. The color tunability is one of the most attractive characteristics in II-VI semiconductor nanoparticles such as CdS, ZnS,…

General Physics · Physics 2012-04-05 M. Alagar , T. Theivasanthi , A. Kubera Raja
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