Materials Literature
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Adult stem cell-derived smooth muscle cells (SMC) may be a promising source of cells for applications in regenerative medicine, including cardiovascular tissue engineering. Primary SMC from native vessels may have limited proliferative capacity and reduced collagen production when sourced from elderly donors, who are…
A major part of the heat supplied in an internal combustion engine is not realized as work output, but dumped into the atmosphere as waste heat. If this waste heat energy is tapped and converted into usable energy, the overall efficiency of AN engine can be improved. The percentage of energy rejected to the environmen…
Development of biologically inspired experimental processes for the synthesis of nanoparticles is an important branch of nanotechnology and is expected to open new avenue to fight and prevent disease. Many researches and studies are evolving regarding the green synthesis of nanoparticles due to the challenges faced by…
高分子の結晶成長に及ぼすトポロジカルな拘束と結び目絡み合いの役割を解明するために，分子量の異なる 3 種の環状ポリエチレン(C-PE)と直鎖状ポリエチレン(L-PE)の球晶成長速度 G を過冷却度 ΔT の関数として測定した．C-PE および L-PE 試料は，修飾型および第二世代 Grubbs 触媒を用いて cis-cyclooctene を開環重合して得られるポリマーを水素化することによってそれぞれ調製した．調製した試料の重量平均分子量 Mw は，C-PE が 9300, 43600 および 86500, L-PE が 44000 であった．すべての試料の G は G=G0 exp(−B/ΔT)の式に従い，球晶成長が表面二次核…
In this communication, we report the facile synthesis of hierarchical mesoporous bio-polymer/silica composite materials with bimodal mesopores using a dual-template of the cationic N,N,N-trimethyl chitosan (TMCs) and the anionic sodium dodecyl sulfate (SDS) via one-step synthetic strategy. Tetraethoxysilane (TEOS) was…
Magnetic nanocrystals are of great interest for a fundamental understanding of nanomagnetism and for their technological applications. CuxFe3−xO4 nanocrystals (x ≈ 0.32) with sizes ranging between 5 and 7 nm were synthesized starting from Cu(HCOO)2 and Fe(CO)5 using oleic acid and oleylamine as surfactants. The nanocr…
Abstract—A dual-frequency cloak based on lumped LC-circuits is proposed. Multiple LC-resonant tanks are employed to satisfy the specific conditions for dual-frequency operations. In this way, the designed cloak features greatly reduce scattering cross sections at the two working frequencies simultaneously. Besides, ex…
Lead-free K(0.5)Na(0.5)NbO(3)/Bi(0.5)Na(0.5)TiO(3) (KNN/ BNT) films have been fabricated by a composite sol-gel technique. Crystalline KNN fine powder was dispersed in the BNT precursor solution to form a composite slurry which was then spin-coated onto a platinum-buffered Si substrate. Repeated layering and vacuum in…
We demonstrated the first example of Janus microspheres with ZnO nanowires. A method for electrochemical growth of ZnO nanowires on partially masked microspheres was adopted in the Janus particle synthesis. The coverage area of ZnO nanowires on the polystyrene or SiO2 microspheres can be tailored by varying the maskin…
Amphiphilic amino acid derived compounds are very interesting for the design of building blocks able to self-assemble into highly ordered nanostructures, in a hierarchical and controlled fashion. With this aim, the modular synthesis and the full characterization of simple Gemini Amphiphilic Pseudopeptides (GAPs) have…
New electrochromic conjugated polymers and their corresponding devices based on EDOT (ethylenedioxythiophene) are described. The best of these polymers display response times on the order of 1s and high switchable contrast in the visible and near-infrared (Vis-NIR) spectral regions. Thin films (70 nm) of these new pol…
A novel class of paramagnetic liposome-based systems acting as dual T(1) and CEST (1)H-MRI contrast agents is described. The vesicles contain a shift reagent in the aqueous core and a Gd-complex on the external surface conjugated through a biodegradable linker. As such, the probe can generate T(1) contrast only, but a…
A new class of dual-mode image probe has been designed and prepared, which is composed of silica-coated Au aggregates and water-soluble CdTe quantum dots (QDs). In such a probe, the two kinds of optical signals, SERS and fluorescence, can be separately generated and switched by changing the wavelength of the excitatio…
A novel distyryl boron dipyrromethene substituted with two 4-(dimethylamino)phenylethynyl groups at the 2- and 6-positions has been synthesised and characterised. It exhibits remarkable and reversible pH-responsive changes in the absorption and fluorescence emission spectra, both in organic and in aqueous media.
We report in this paper a facile way to prepare novel amine-functionalized monomethoxy-poly(ethylene glycol)-b-poly(ε-caprolactone) (mPEG-b-PCL) amphiphilic block copolymers, which are subsequently fluorescently labeled. In our synthetic route, monomethoxy-poly(ethylene glycol)-b-poly[ε-caprolactone-co-γ-(carbamic aci…
The structures and magnetic properties of four isomorphous nonanuclear heterometallic complexes [Na(2){Mn(3)(III)(μ(3)-O(2-))}(2)Ln(III)(hmmp)(6)(O(2)CPh)(4)(N(3))(2)]OH·0.5 CH(3)CN·1.5H(2)O are reported, where Ln(III) = Eu (1), Gd (2), Tb (3) and Dy (4), H(2)hmmp = 2-[(2-hydroxyethylimino)methyl]-6-methoxyphenol. Com…
The self-alignment and optical dichroism of Au nanoparticle chains grown by glancing incidence deposition on rippled Al 2 O 3 thin films is investigated. Although the nucleation of the nanoparticles is almost isotropic, their growth is strongly anisotropic resulting in a sharp dependence of their optical transmittance…
A direct seedless method for the continuous synthesis of gold nanorods has been developed using a sequential rotating tube-narrow channel processing microfluidic configuration, with the stock feed solutions (HAuCl(4)/CTAB/acetylacetone and AgNO(3)/CTAB/carbonate buffer) being stable for weeks.
Several zinc complexes bearing amido-oxazolinate ligands are described. Reactions of ligand precursors, HNC(2)(E)Oxa (HNC(2)(E)Oxa = HNC(2)(Me)Oxa, HNC(2)(OMe)Oxa, HNC(2)(StBu)Oxa and HNC(2)(NMe2)Oxa) or HNPh(SMe)Oxa, with half or one molar equivalent of ZnEt(2) afford bis(chelate) zinc complexes, (NC(2)(E)Oxa)(2)Zn […
Two lanthanide tetrafluoro-p-phthalate (L(2-)) complexes, Ln(L)(1.5)·DMF·H(2)O (Ln = Pr(3+) (1), Nd(3+) (2)), were synthesized using pyridine as a base. The compounds were found to be isostructural, and the structure of 1 has been determined by single crystal X-ray diffraction (monoclinic, space group C2, a = 22.194(2…