Materials Literature
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This article introduces a novel design for a soft morphing actuator capable of pure twisting motion through a pair of shape memory alloy wires embedded in a polydimethylsiloxane matrix at constant and opposite eccentricity across the cross section in opposite directions. This report introduces the design of the actuat…
Chemokine-induced stem cell recruitment is a promising strategy for post myocardial infarction treatment. Injection of stromal cell-derived factor 1 (SDF1) has been shown to attract bone marrow-derived progenitor cells (BMPCs) from the blood that have the potential to differentiate into cardiovascular cells, which sup…
To produce lignocellulosic biofuels economically, the complete release of monomers from the plant cell wall components, cellulose, hemicellulose, and lignin, through pre-treatment and hydrolysis (both enzymatic and chemical), and the efficient utilization of these monomers as carbon sources, is crucial. In addition, t…
In situ real-time monitoring of upconversion emission is applied to study the reaction mechanism for the synthesis of β-NaYF 4:17% Yb,3% Er nanoparticles in oleic acid and octadecene via the heat-up method. Transmission electron microscopy is used to correlate the spectroscopic signature of the reaction mixture with i…
A facile photoreduction strategy to attach silver nanoparticles on filter paper (AgNPs@FP) to form surface‐enhanced Raman scattering (SERS) substrate array was proposed and examined. As prepared, SERS substrate array was applied to detect low concentration of adenine and other nucleobases in aqueous solutions. In addi…
Scanning Electrochemical Microscopy (SECM) is introduced as a promising technique to probe localized interfacial kinetics at the interface of electrolyte/supercapacitor electrode based on polyaniline (PANI) by measuring approach curves from which heterogeneous charge transfer rate constants (k eff) are extracted. The…
ABSTRACT Crosslinking core‐shell emulsions of waterborne fluorinated polyurethane‐acrylate (WFPUA) were successfully synthesized using a solvent‐free method. The crosslinkers of diacetone acrylamide and adipic dihydrazide were introduced into the WFPUA emulsions. The physical properties of hybrid emulsions such as the…
Abstract Spherical boron nitride nanoparticles with good aqueous dispersibility were synthesized by means of a direct reaction of boric acid and ammonium chloride. The X‐ray powder diffraction pattern confirmed the hexagonal BN structure (h‐BN) with d002 = 3.33 Å. Copper oxide (CuO) was found to affect the morphology…
We report herein the synthesis and characterization of Au25 clusters containing tellurolates (TePh) in the ligand shell ([Au25(TePh)n(SC8H17)18-n](-); n = 1-18). [Au25(TePh)n(SC8H17)18-n](-) clusters were synthesized by reacting [Au25(SC8H17)18](-) with diphenyl ditelluride ((PhTe)2) in solution. Characterization of t…
The molecular mobility of ibuprofen confined to a mesoporous silica host (MCM-41) of 3.6 nm pore diameter is investigated by dielectric relaxation spectroscopy. It is confirmed that crystallization is suppressed; therefore, depending on the temperature, the guest exists in the glassy and supercooled state inside of th…
PEGylated magneto-plasmonic nanoparticles with a hollow or semi-hollow interior have been successfully synthesized and their physico-chemical characteristics have been investigated. The hollow interior space can be used to store drugs or other molecules of interest whereas magnetic characterization shows their potenti…
We have developed a yellow persistent phosphor of Ce 3+ –Cr 3+ -codoped Gd 3 Al 2 Ga 3 O 12 transparent ceramics prepared by a solid-state reaction. The yellow persistent luminescence due to the Ce 3+ : 5d–4f transition was observed even after 460 nm blue-light excitation as well as after UV excitation. The chromatici…
Although SERS spectroscopy, which is sensitive to molecular vibration states, offers label-free visualization of molecules, identification of molecules and their reliable large-area imaging remains to be developed. Limitation comes from difficulties in fabricating a SERS-active substrate with homogeneity over a large…
The polarization of the ferroelectric polymer P(VDF-TrFE) decreases upon prolonged cycling. Understanding of this fatigue behavior is of great technological importance for the implementation of P(VDF-TrFE) in random-access memories. However, the origin of fatigue is still ambiguous. Here we investigate fatigue in thin…
We report on the fabrication and characterization of magnetic tunnel junctions consisting of a single layer of graphene as the tunnel barrier, sandwiched between two metallic ferromagnetic electrodes. We employ a fabrication process chosen to minimize oxidation of the electrode materials at the ferromagnet/graphene in…
A novel phosphorus–nitrogen-silicon polymeric flame retardant (PNSFR) was synthesized via polycondensation and characterized by FTIR, 1 HNMR, and 31 PNMR. The thermogravimetric analysis (TGA) of PNSFR showed that the temperature of 10 wt % weight loss for PNSFR was about 270 °C both under nitrogen and air, which indic…
We propose a tunable strategy for the ultrathin mantle cloak via metasurface. The tunable cloak is implemented by loading varactor diodes between two neighboring horizontal metallic strips which constitute the metasurface. We demonstrate that the varactor diodes enable the capacitive reactance of the metasurface to be…
The physicochemical and droplet impact dynamics of superhydrophobic carbon nanotube arrays are investigated. These superhydrophobic arrays are fabricated simply by exposing the as-grown carbon nanotube arrays to a vacuum annealing treatment at a moderate temperature. This treatment, which allows a significant removal…
The defect formation energies and atomic geometries of interstitial hydrogen in its different charge states in a number of wide band gap oxides are calculated by the Heyd, Scuseria, Ernzerhof hybrid functional. As in semiconductors, two behaviours are found, it acts either as an amphoteric defect or as a shallow donor…
Micro-characterized variables are proposed to precisely characterize a micro-V-grooved Si surface through the 3D measured topography rather than the designed one. In this study, level and gradient micro-grooved surfaces with depth of 25–80 µm were precisely and smoothly fabricated using a new micro-grinding process ra…