Simulations of the absorption efficiency using discrete dipole approximation (DDA) method and taking into account real shape gold nanorods are reported. A dominant surface plasma band corresponding to longitudinal resonance is observed. Its maximum position lambda(max) shifts red as aspect ratio increases. The transversal dipolar multipolar mode wavelength positions also discussed. These data in good agreement with previous theoretical work based on classical electrostatic predictions...

Abstract Raman spectroscopy of a single 40 nm 3C‐SiC nanowire (NW) has been achieved at room temperature with the use surface‐enhanced scattering (SERS). The structure used to enhance process is based on tungsten tip covered by thin gold layer; NW attached apex this tip. specific dimensions SiC NWs (diameters are few tens nanometers and lengths micrometers) allow us study several parts an individual according lateral resolution microspectrometer. High‐resolution transmission electron...

The spectrally- and polarization-resolved absorption cross-sections of a single gold nanorod have been investigated using the spatial modulation spectroscopy technique. ensemble its optical features, that is, longitudinal transverse surface plasmon resonances interband absorption, has quantitatively characterized. results are compared with numerical simulations discrete dipole approximation finite element method, yielding information on size shape.

The use of reverse micelles makes it possible to produce copper nanocrystals characterized by various sizes and shapes. By increasing the water content, average size metallic increases from 3 13 nm. Structural investigations clearly indicate formation pure with crystallographic structures. absorption spectra corresponding colloidal solutions exhibit two plasmon modes in UV−visible range, around 560 640 progressive emergence first mode (Mie's resonance a perfect sphere) increase mean particle...

We study localized surface plasmons in strong coupling with excitons of organic semiconductors. The are lithographed silver nanodisks organized square array. A giant Rabi splitting energy 450 meV is obtained, and typical behaviors mixed states, i.e., anticrossing their energies crossing linewidths, observed. Three-dimensional finite-difference time-domain simulations coupled oscillator calculations used to analyze corroborate the experimental results.

Core tip:The article is an in-depth review of the state art molecular recognition processes involving hybrid nanoparticles and bio-molecular substrates.We describe methods preparation physical characterization.The capping by proteins, DNA, peptides supramolecular assemblies, including cyclodextrins, calix[n]arenes, cucurbitales, dendrimers crown ethers then discussed.There a large analysis interactions these systems with various substrates, such as complimentary oligo-nucleotides,...

A process to synthesize continuous conducting nanofibers were developed using PEDOT:PSS as a polymer and an electrospinning method. Experimental parameters carefully explored achieve reproducible conductive synthesis in large quantities. In particular, relative humidity during the was proven be of critical importance, well doping post-treatment involving glycols alcohols. The synthesized fibers assembled mat on glass substrates, forming transparent electrode their optoelectronic have been...

The simulated optical properties of silver nanodisks are presented. extinction, absorption, and scattering efficiencies calculated using the discrete dipole approximation. influence nanodisk size, truncature (snip), aspect ratio, environment on plasmon resonance bands is investigated. In particular, dipolar multipolar peak positions have been related to specific features geometry. An interpretation origins each mode proposed for first time taking into account this

Abstract We present a simple process for the fabrication of very long SiC‐based coaxial nanocables (NCs). The versatility this technique is confirmed by ability to change chemical composition NC outer layers from silica carbon and boron nitride. NCs consist SiC core approximately 30 nm in diameter with lengths up several hundred nanometers. thickness coating range 2–10 nm. morphology structural characterization investigated scanning electron microscopy (SEM) high‐resolution transmission...

Highly ordered arrays of boron nitride nanotubes (BN-NTs) were prepared for the first time by combining a polymer thermolysis route and template process. The strategy involves four steps, i.e., synthesis liquid polymeric borazine, liquid-phase infiltration an alumina membrane, at 1200 °C under nitrogen confined in 200 nm nanochannels, etching to generate BN-NTs supported BN sheet. Their crystallinity was controlled through further high-temperature treatments. thin multiwall displaying...

Novel boron nitride (BN) fibers have been developed with diameters ranging from the nano- to microscale by thermal conversion of as-electrospun polyacrylonitrile and poly[B-(methylamino)borazine] blend solutions. Such a new class ceramic is seen as potential candidate for management applications filtration systems in harsh environments.

We report a simple synthetic route based on electroless deposition (galvanic displacement) and natural lithography to simultaneously control the shape organization of Au nanoparticles (NPs). show for first time formation organized extended domains nanoflowers nanocrowns with single crystalline tips. The dimension morphology desired nanostructures (NSs) can be tuned easily by controlling conditions at room temperature using saccharin as an organic additive. exact role crystal growth process...

Copper nanocrystals are obtained by chemical reduction of copper ions in mixed reverse micelles. A large excess reducing agent favors producing a new generation shaped as nanodisks, elongated nanocrystals, and cubes. By using UV-Visible spectroscopy numerical optical simulations we demonstrate that the properties tuned relative proportions spheres nanodisks.

We have developed a straightforward synthetic route to prepare core-shell systems based on gold nanoparticles (NPs) surrounded with J-aggregates molecules. This synthesis allows the direct and efficient coating, at room temperature, of pretreated citrate-stabilized NPs 5, 5′, 6, 6′-tetrachloro-1-1′-diethyl-3, 3′-di (4-sulfobutyl)-benzimidazolocarbocyanine (TDBC), without supplementary adding salts bases during synthesis. As size particle is tunable, precise optimization strong coupling...

A novel approach based on the Stöber method allows breaking of symmetry core–shell systems metallic core and metal oxide shell. By adjusting proportion TiO2 precursor with regard to silica precursor, different morphologies particles have been obtained displacing gold particle from center eccentric positions leading acorn-like raspberry-like structure.

Self-standing highly crystallized hexagonal boron nitride (h-BN) mono-, bi- and few-layers have been obtained for the first time via Polymer Derived Ceramics (PDCs) route by adding lithium (Li₃N) micropowders to liquid-state polyborazylene (PBN). Incorporation of Li₃N as a crystallization promoter allows onset h-BN at lower temperature (1200 °C) than under classical conditions (1800 °C). The structure was confirmed both electron X-ray diffraction.

Silver nanodisks, having two different sizes, and spherical particles are synthesized by soft chemistry. By using centrifugation, nanodisks mainly selected. The experimental absorption spectra of these with sizes compared to those simulated the discrete dipole approximation method. For small nanodisk shape is neglected closest experiments obtained assuming a spheroidal particle. Conversely, for larger precise geometries represented snip aspect ratio needed good agreement between simulations.

Highly ordered two-dimensional (2D) mesoporous silicoboron carbonitride (SiBCN) materials were prepared by a double nanocasting approach using SBA-15 silica as starting template. The latter was converted into its negative replica CMK-3 carbon template, which subsequently impregnated with boron-modified polysilazanes of the type [B(C2H4SiCH3NCH3)3]n ([C14.4H31.4N4.1B1.0Si3.0]n) liquid-phase impregnation (LPI) process. derived [B(C2H4SiCH3NCH3)3]n-carbon composite cross-linked under ammonia at...