Materials Literature
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Nanoantennas for visible and infrared radiation can strongly enhance the interaction of light with matter by their ability to localise electromagnetic fields on nanometric scales. This allows for the engineering of the absorption and radiation capabilities of nanoemitters, such as dye molecules or quantum dots. In thi…
Summary In this paper, a repetitive learning control (RLC) scheme is developed for a class of nonlinear systems to handle an output tracking problem, where two state observers are introduced concurrently to estimate the unavailable control system and reference states information. The estimation of reference state info…
The near-edge fine structure of the carbon K-edge absorption spectrum of anthracene was measured and theoretically analyzed by density functional theory calculations implemented in the StoBe code. It is demonstrated that the consideration of electronic relaxation of excited states around localized core holes yields a…
Folding-induced folding for the construction of artificial hybrid helices from two different kinds of aromatic sequences is described. Linear compounds 1 a, 1 b, and 2, containing one aromatic amide trimer or pentamer and one or two aromatic 1,2,3-triazole tetramers, have been designed and synthesized. The trimeric an…
Positron annihilation lifetime spectroscopy (PALS) provides a direct measurement of the free volume void sizes in polymers and biological systems. This free volume is critical in explaining and understanding physical and mechanical properties of polymers. Moreover, PALS has been recently proposed as a potential tool i…
Amphiphilic rod–coil dendritic–linear block copolymers PEG(G m )- b -PMPCS (where m is the number of dendron generation, and m = 1, 2, 3) composed of a semirigid Percec-type dendron with hydrophilic poly(ethylene glycol) (PEG) tails and a rod-like mesogen-jacketed liquid crystalline polymer, poly{2,5-bis[(4′-methoxy-p…
Reactions of the open-cage fullerene C63NO2(Py)(Ph)2 (1) with [Ru3(CO)12] produce [Ru3(CO)8(μ,η(5)-C63NO2(Py)(Ph)2)] (2), [Ru2H(CO)3(μ,η(7)-C63N(Py)(Ph)(C6H4))] (3), and [Ru(CO)(Py)2(η(3)-C63NO2(Py)(Ph)2)] (4), in which the orifice sizes are modified from 12 to 8, 11, and 15-membered ring, through ruthenium-mediated C…
A novel cross-linked hydrogel has been synthesized through graft copolymerization of acrylic acid onto Gum tragacanth, in the presence of ascorbic acid–potassium persulphate as an initiator. Characterization of the synthesized hydrogel was carried out by thermogravimetric analysis (TGA), differential thermal analysis…
Mesenchymal stem cells (MSCs) are multi-potential cells that are able to proliferate and differentiate into other cell types. Much research has been done on the MSCs from the umbilical cord (UCMSCs) in human, mice, and avian, but little literature has been published about these cells in big livestock. Here, we choose…
We investigate the structural properties of Ge nanostructures selectively grown on Si. Defect-free nanostructures with a lateral size of 100 nm and surrounded by a thick (\ensuremath{\sim}20 times larger than the coherent-film limit) Ge layer are achieved as demonstrated by transmission electron microscopy. As demonst…
The main goal of this research is to develop a chemical solution derived planarization layer to fabricate highly aligned IBAD-MgO templates for the development of high temperature superconductor (HTS) based coated conductors. The standard IBAD-MgO template needs an additional electrochemical polishing step of the mech…
The optical properties of close-packed polystyrene colloidal crystal particles could be improved and controlled via adjusting their shape, by first forming colloidal suspension–gas Janus droplets with different structures in a double coaxial microfluidic device, and then solvent-extraction-derived self-assembly to for…
Ionic polymer-metal composite (IPMC) actuators based on two types of triple-layered Nafion composite membranes were prepared via consecutive solution recasting and electroless plating methods. The triple-layered membranes are composed of a Nafion layer containing an amphiphilic organic molecule (10-camphorsulfonic aci…
We developed a quantitative approach for the determination of molecular arrangement and electronic structure in anisotropic organic ultrathin films based on the measurement of polarized reflectivity at the carbon K-edge. The reflectivity spectra were fitted to a parameterized model calculation. The method was applied…
Silver nanoparticles synthesized in a synthetic sapphire matrix were fabricated by ion implantation using the metal vapor vacuum arc ion source. The optical absorption spectrum of the Ag: Al2O3 composite material has been measured. The analysis of the supercontinuum spectrum displayed the nonlinear refractive property…
Biofilms are communities of surface-attached microbial cells that resist environmental stresses. In this study, we found that low concentrations of ethanol increase biofilm formation in Pseudomonas aeruginosa PAO1 but not in a mutant of it lacking both Psl and Pel exopolysaccharides. Low concentrations of ethanol also…
Artificial spin ice is a frustrated magnetic two-dimensional nano-material, recently employed to study variety of tailor-designed unusual collective behaviours. Recently proposed extensions to three dimensions are based on self-assembly techniques and allow little control over geometry and disorder. We present a viabl…
The production of effective loading and direct deposition of Pt nanoparticles on graphene is difficult because this intriguing carbon material has highly hydrophobic surface properties. In this work, Pt/graphene sheet (GS) composites were successfully synthesized via a simple, effective, and environmentally benign one…
Ultrafast switching with low energies is demonstrated using InP photonic crystal nanocavities embedding InGaAs surface quantum wells heterogeneously integrated to a silicon on insulator waveguide circuitry. Thanks to the engineered enhancement of surface non radiative recombination of carriers, switching time is obtai…
Ion sputtering of Zerodur material often results in the formation of nanoscale microstructures on the surfaces, which seriously influences optical surface quality. In this paper, we describe the microscopic morphology evolution during ion sputtering of Zerodur surfaces through experimental researches and theoretical a…