Materials Literature
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Large particle sizes having a strong light scattering lead to a significantly decreased surface area and small particle sizes having large surface area lack light-scattering effect. How to combine large and small particle sizes together is an interesting work for achieving higher solar efficiency. In this work, we inv…
A novel microporous organic polymer framework with built-in metal sites in the skeleton has been synthesized by the Sonogashira–Hagihara reaction using salen-palladium as building units. The new microporous organic polymer possesses a high BET surface area, large pore volume, good stability and acts as a highly effici…
In this work, results are given for controlling waves arbitrarily inside a lattice with spatially variant self-collimation. To demonstrate the concept, an unguided beam was made to flow around a 90◦ bend without scattering due to the bend or the spatial variance. Control of the field was achieved by spatially varying…
Novel core–shell magnetic mesoporous silica hybrid nanoparticles were synthesized and functionalized further with a glycidol reagent to produce boron-specific cis-diol, chelating functional derivatives. The resulting core–shell hybrid nanoparticles were found to be a better alternative to the existing boron adsorbents…
Chromium oxide nanoparticles were synthesized by the reduction of potassium dichromate solution with Mukia Maderaspatana plant extract. In electrochemical methods, Cr2O3 nanoparticles were synthesized by two ways, using platinum (Pt) electrodes and K2Cr2O7 solution with H2SO4 as medium in the first case. And chromium…
The m-SiO(x)/Si composite for lithium ion battery anode was prepared via a partial reduction reaction between ball-milled silicon monoxide and magnesium by high-energy mechanical milling. The m-SiO(x)/Si is composed of Si-suboxide and embedded Si nano-crystallites. The particles were further covered by a uniform carbo…
Bifunctional mesoporous silica nanoparticles (MSNs) bearing Pd-complexes and additional basic sites were prepared and tested as cooperative active catalysts in the Tsuji-Trost allylation of ethyl acetoacetate. Functionalization of the MSNs was realized by postmodification using click-chemistry. The selectivity of mono…
We present a novel wave equation for linearized plasmonic response, obtained by combining the coupled real-space differential equations for the electric field and current density. Nonlocal dynamics are fully accounted for, and the formulation is very well suited for numerical implementation, allowing us to study waveg…
福島第一原子力発電所事故によって環境中に降り積もった放射性核種が，地点ごとに原子炉1～3号機の中でどの放出源の寄与によるものであるかを134Cs/137Cs放射能比（以下放射能比）を指標として調べた．事故によって放出された134Csと137Csの放射能比はおよそ1 : 1であるが，細かく見ると原子炉ごとに比が異なるために環境試料中で放射能比のばらつきが生じており，その比が汚染源ごとの寄与の大きさを表す指標になると考えられる．そこで本研究では東日本の広域で土壌・植物片を採取してγ線測定を行い，各地点における放射能比を算出した．また東京電力が公開している原子炉建屋やタービン建屋の汚染水の放射能から，各原子炉における134Cs/137C…
The conversion of layered metal hydroxides into a metal–organic framework is studied for the case of Fe–BTC (BTC = 1,3,5-benzenetricarboxylate). The synthesis occurs at room temperature as early as 5 min using a layered double hydroxide, green rust, as a precursor and yielding a product with high surface area. Monitor…
The conventional heterogeneous catalysts involved in biodiesel production include mixed metal oxides, alkaline metal oxides, ion-exchange resins, sulfated oxides and immobilised enzymes. Heterogeneous catalysis has emerged as the preferred alternative for biodiesel production because the products are easy to separate,…
A new compact ultrawideband (UWB) patch antenna based on the resonance mechanism of a composite right/left-handed (CRLH) transmission line (TL) is proposed.The radiating element of the antenna is made from three left-handed (LH) metamaterial (MTM) unit cells placed along one axis, where each unit cell combines a modif…
Mesoporous sulfonated melamine–formaldehyde resin (MSMF) has been successfully synthesized from the self-assembly of a copolymer surfactant (F127) with a mixture of melamine, formaldehyde and NaHSO3 in an aqueous solution. After removal of the copolymer surfactant (F127) by ethanol extraction, the MSMF exhibits unifor…
In this study, a bi-functional mechanism is proposed and validated, which may be used to explain all of the reported experimental observations and to predict new sensing control parameters. Fast response and recovery in H2S sensing was then realized by using bi-functional SnO2 nanowires which have been radially modula…
Surface wrinkling of materials offers a simple yet elegant approach to fabricating cell culture substrates with highly ordered topographies for investigating cell mechanobiology. In this study we present a tunable shape memory polymer (SMP) bilayer system that is programmed to form, under cell compatible conditions, w…
With first-principle DFT calculations, the catalytic activity of heteroatom-doped carbon nanostructures in oxygen reduction reaction is investigated by exploring the active site of B-doped, N-doped and (B, N)-codoped and analyzing the kinetic pathways of oxygen reduction with the participation of protons. It is found…
The behavior of WO3 photoanodes has been investigated in contact with a combination of four anions (Cl−, CH3SO3−, HSO4−, and ClO4−) and three solvents (water, acetonitrile, and propylene carbonate), to elucidate the role of the semiconductor surface, the electrolyte, and redox kinetics on the current density vs. poten…
In2O3-In2S3 core-shell nanostructures were prepared via a simple hydrothermal process at low temperatures. Ultraviolet photoelectron spectroscopy (UPS) shows that the In2O3-In2S3 nanorod is an inverted type I nanostructure. The energy potential in this structure would drive both the photo-generated holes and electrons…
MicroRNAs are small non-coding RNAs that suppress gene expression through target mRNA degradation or translation repression. Recent studies suggest that miRNA plays an important role in multiple physiological and pathological processes in the nervous system. In this review article, we described what is currently known…
The inner structure of W18O49 mesocrystals was observed by electron microscopy with the help of ultramicrotomy and focused ion beam techniques. The results showed that these mesocrystals contain irregular mesopores formed through partial fusion of self-assembled nanowires, and consequently have long-range structural o…