Spherical and polyhedral carbon onions prepared from diamond nanoparticles are investigated by high-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, spin resonance (ESR). HRTEM studies show that, as a result of thermal annealing, transformed into spherical onions, finally the progress graphitization. ESR spectra for only narrow signal corresponding to dangling bond spins associated with structural defects. In contrast, an additional broad due conduction emerges. These...

We report an experimental study on magneto-optical (MO) Kerr effects of yttrium-iron garnet (YIG) thin films incorporating Au nanoparticles. The polar MO spectra in the wavelength between 400 and 800 nm show that, by nanoparticles, rotation angles become negative values region, where localized surface plasmon polariton (SPP) resonance nanoparticles is located. anomalous indicates a possible coupling effect YIG SPP. A mechanism for discussed.

We experimentally observe nonlinear spin torque in metallic bilayers of platinum and permalloy by means spin-torque ferromagnetic resonance (ST-FMR) under massive dc current injection. The observed exerted on magnetization is attributed primarily to polarization. An additional origin the magnon generation (annihilation) followed shrinkage (expansion) effective magnetization, which revealed ST-FMR unidirectional Hall magnetoresistance measurements. present paper paves a way effect based...

We demonstrate a chiral meta-molecule in the ultraviolet (UV) and visible (VIS) regions using complex of Au nanoparticles (NPs) rod-shaped tobacco mosaic virus (TMV). NPs five nm diameter are uniformly formed on peptide-modified TMV. The TMV with uniform-sized has improved dispersion solution. A negative circular dichroism (CD) peak is produced around 540 nm, at plasmonic resonance wavelength NPs. Additionally, modification CD UV region observed. Attaching to causes enhancement peaks both...

We experimentally demonstrate magnon polaritons with ultrastrong coupling and directional nonreciprocity in a metamolecule lacking time-reversal space-inversion symmetries at room temperature. These experimental results are reproduced well via numerical simulations theoretical considerations. Ultrastrong is due to direct interaction of magnons the magnetic meta-atom microwave photons confined chiral as resonator. Our reveal crucial step identifying deep strongly coupled optically moving for...

We report the first in situ observation of hollow organic globules any extraterrestrial material using Tagish Lake carbonaceous chondrite. Data from analytical transmission electron microscopy, Raman and micro-Fourier-transform infrared (FTIR) spectroscopy indicate that consist aliphatic oxygenated functions. The spherical morphologies are strikingly similar to produced by laboratory simulation ultraviolet photolysis interstellar ice analogues subsequent aqueous processing, suggesting...

We report direct observation of magnetochiral (MCh) effects for the $X$-band microwaves through a single metamolecule consisting copper chiral structure and ferrite rod. A fictitious interaction between chirality magnetism is realized in without intrinsic electronic interactions. The MCh are induced at resonant optical activities by applying weak dc magnetic field 1 mT, increased with field. nonreciprocal differences refractive indices evaluated to be ${10}^{\ensuremath{-}3}$ 200 mT.

Gold nanoparticles are generally considered to be biologically inactive. However, in this study we show that the addition of 1.4 nm diameter gold nanoparticle induces remodeling ring-shaped protein TRAP into a hollow, capsid-like configuration. This structural is dependent upon presence cysteine residues on surface as well specific type nanoparticle. The results reveal an apparent novel catalytic role nanoparticles.

Systematic and reproducible control over average interparticle spacing of Pt, Ni, Cu nanoparticles embedded in polyimide thin layers was achieved. The metal-catalyzed decomposition matrixes surrounding metal causes a decrease the composite layer thickness, while maintaining size nanoparticles. This ability provides an effective methodology for preparation metal/polymer nanocomposites with tailored microstructures holds great promise toward fundamental understanding physical interactions among

Optical extinction due to surface plasmon resonances of spherical and polyhedral carbon onions prepared from diamond nanoparticles has been studied. Extinction spectra for the dispersed in distilled water were obtained experimentally by optical transmission spectroscopy. Theoretical considerations given interpret experimental results. For onions, a defective onion model was introduced features traced back aggregate onions. The spectrum with two peaks reproduced treating planar segments as...

We have experimentally studied the structure and magnetic interaction in Ni nanoparticle systems embedded polymer matrices. The shrinkage of matrices due to thermal decomposition leads a decrease spacing among particles, which maintain fixed diameter several nanometers. This is accompanied by significant shift electron magnetic-resonance signals. Based on theoretical calculation, traced back an enhancement dipolar diminution interparticle spacing, suggesting that we succeeded tuning systems.

The diversity and the abundance of amphibians have dramatically declined globally over past 30 years, monitoring conservation their habitats is essential. However, traditional methods such as bait trapping mark-recapture are costly, morphological identification usually requires a high level taxonomic expertise. Here, seasonal surveillances Hida salamander Hynobius kimurae were performed by means environmental DNA (eDNA) analysis with -specific primers species-specific TaqMan probe. Water...

We have theoretically evaluated magnetic permeability of Ni nanocomposite films, in which the dipolar interactions between particles are considered explicitly. A numerical model is constructed according to our recent experimental results and a micromagnetic calculation conducted. show that value strongly depends on volume fraction randomness particles. Particularly, as increases, negative drastically shrinks. However, region applied field, where negative, becomes broader. This advantageous...

We have studied the magnetic properties of Ni nanoparticles incorporated in polyimide films using dc- and ac-magnetization measurements. Transmission electron microscopy images reveal that both mean particle diameter $({d}_{\mathit{ave}})$ volume fraction particles $({\ensuremath{\eta}}_{\mathit{ave}})$ composite layer can be controlled independently. In a series samples with fixed ${d}_{\mathit{ave}}$, system lowest ${\ensuremath{\eta}}_{\mathit{ave}}$ behaves magnetically as an ensemble...

We report resonant photon tunneling (RPT) through onedimensional metamaterials consisting of alternating layers metal and dielectric.RPT via a surface plasmon polariton state permits evanescent light waves with large wavenumbers to be conveyed the metamaterial.This is mechanism for sub-wavelength imaging recently demonstrated super-lens.Furthermore, we find that RPT peak shifted from reflectance dip increasing number Al layers, indicating shift caused by losses in RPT.

Ferromagnetic resonance (FMR) in diluted Fe nanogranular films with low volume fractions of (v) has been studied. Films prepared by a co-sputtering technique are composed amorphous nanoparticles embedded SiO2 glass matrices. The the FMR uniform mode is found to be strongly affected v, temperature, and angle between film plane applied magnetic field. present study suggests that values these parameters should carefully selected order realize left-handed materials using ferromagnetic-metal films.

A synthesis method for nanocomposite microspheres containing Ni nanoparticles via chemical surface modification has been developed, by which particle size and interparticle distance embedded can be systematically controlled. The process relies on introduction of carboxyl acid groups hydrolysis matrix polymer, incorporation ions ion exchange reaction, hydrogen-induced reduction doped in the sphere followed nanoparticle-catalyzed decomposition surrounding polymer matrix. We demonstrate...