Materials Literature
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Abstract The photoluminescence and vibrational properties of silicon nanocrystals are studied in a multilayered system elaborated by successive evaporations of SiO and SiO2 layers with controlled thicknesses. The multilayer systems are deposited on a glass substrate (Herasil). The photoluminescence and Raman spectra a…
We have investigated the delocalized nature of Ce 4$f$ electrons in CeB${}_{4}$, employing the first-principles total energy electronic structure calculations. We have shown that CeB${}_{4}$ has a paramagnetic ground state in agreement with experiment, and that the valence state of Ce is rather close to trivalent (${f…
Nano-imprint lithography (NIL) is a simple, low cost and high-resolution patterning method. However the precise evaluation method of nano-imprinted structure has not been established. Synchrotron radiation small angle X-ray scattering (SR-SAXS) measurement is a nondestructive and high resolution characterization metho…
Flowback water from natural gas extraction in Marcellus Shale contains very high concentrations of inorganic salts (mostly chlorides) and organic chemicals. Due to its adverse impact to the human health and environment, proper disposal of flowback is required. Reuse or reinjection of flowback water for the development…
In an orthotopic brain tumor mouse model, it was shown that convection-enhanced intratumoral delivery of a theranostic metallofullerene (f-Gd₃N@C₈₀) labeled with lutetium 177 (¹⁷⁷Lu) and tetraazacyclododecane tetraacetic acid (DOTA) (¹⁷⁷Lu-DOTA-f-Gd₃N@C₈₀) increases median survival from 21 to 52 days, with a prolonged…
Abstract Novel amphiphilic block copolymers containing the anthracene unit in the main chain are synthesized by reversible addition‐fragmentation chain transfer (RAFT) polymerization of a cyclic monomer, 10‐methylene‐9,10‐dihydroanthryl‐9‐spirophenylcyclopropane (MDS). A hydrophilic macro‐chain transfer agent is prepa…
An optical system for an X-ray microprobe using a Fresnel zone plate (FZP) has been developed at beamline BL15 in the SAGA Light Source. A commercial FZP was used as a focusing device. A 100-μm pinhole was used as a pseudo-point light source in the experimental hutch. The distance between the pinhole and the FZP was 1…
An accurate knowledge of the attenuation lengths of photoelectrons is necessary for quantitative analysis by x-ray photoelectron spectroscopy (XPS), especially for the determination of the thicknesses of thin films. Imamura et al ( 2011 Meas. Sci. Technol. 22 024007 ) have recently reported measured values of the atte…
Attempt has been made to join TiO 2 / SiO 2 multilayer thin films at low temperature during sputter deposition. Joining strength was evaluated by haze value after abrasion test. Joining strength was found to be improved by forming Al 2 O 3 layer of 10 nm thickness at the interface between TiO 2 and SiO 2 . Transmissio…
well as the tissue growth and sensitivity degradation with time are concerns.Studies on the vibrational behavior of middle ear Ossicular bones were made.The umbo presents as the most promising site for acoustic sensor to be coupled to as the implantable microphone, because I) The sound is naturally picked up from temp…
Abstract In the ultimate aim of grafting a fluorescent group on carbon nanotubes (CNTs) using COOH functions as anchoring groups, it was realised that optimisation of the carboxylation step of the CNTs was essential in the overall process. To reach this goal, three different treatment times with refluxed nitric acid h…
We investigated chemical states and photoluminescence of Si0.3Ge0.7-nitride film with a surface that was modified by N2+ ion implantation and rapid thermal annealing (RTA). By increasing the implantation time, the chemical bonding between Si and Ge was directly broken, and subnitrides were formed. We also observed the…
Understanding of the microscopic dynamics of fillers in rubber is a key to understand the property of macroscopic response of filled rubber. In the present study, we observe microscopic dynamics of silica and carbon black nanoparticles in unvulcanized rubber by using X-ray Photon Correlation Spectroscopy (XPCS). Depen…
A large improvement of the effective lifetime of n-type phosphorus doped multicrystalline silicon to reach 950 μs has been realized by combining both two step phosphorus treatments and surface oxidation. The average lifetime increases after the phosphorus diffusion process is mainly attributed to the remove of killer…
The relaxation of vibrational energy in the H and D stretch modes has been studied on the graphene surface using ab initio calculations. The dissipation of the vibrational energy stored in the stretching modes proceeds through vibration-phonon coupling, while the dissipation through electronic excitations makes only m…
This article reports on the optical properties of Er3+ ions doped CdO-Bi2O3-B2O3 (CdBiB) glasses. The materials were characterized by optical absorption and emission spectra. By using Judd-Ofelt theory, the intensity parameters Ω(λ) (λ = 2, 4, 6) and also oscillatory strengths were calculated from the absorption spect…
To investigate the phenomena that occur at the growth temperatures, an MOVPE (metalorganic vapor phase epitaxy) growth system was installed in the X-ray diffractometer of the laboratory level. The present MOVPE system is capable of growing GaN and related materials that are advanced in the device applications but very…
Quick x-ray reflectivity (QXRR) is a new surface examination technique for studying fast processes at the surface and interface of the materials on a nano-scale. The currently available models for classical scanning-type x-ray reflectivity cannot be applied directly to the QXRR simulations. The present article propose…
By introducing artificial pinning sites to locally modify coercivity in perpendicularly magnetized TbFeCo wires, strip domains were constructed without expense of specimen damage. The construction of strip domains with well-defined shape and controllable number enables a determination of magneto-resistance contributin…
Besides the European Union (EU) Directive on Registration, Evaluation, Authorization and Restriction of CHemicals (REACH), the EU Water Framework Directive (WFD) is probably the single most important piece of environmental legislation in Europe when it comes to dealing with nanomaterials in the future given their wide…