Materials Literature
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Abstract Nanoparticles of nine phosphazenes with general formula 4‐CH 3 C 6 H 4 S(O) 2 N=P X 3 [ X = Cl ( A ), NC 4 H 8 ( 1 ), NC 6 H 12 ( 2 ), NC 4 H 8 N–C(O)OC 2 H 5 ( 3 ), NC 4 H 8 N–C(O)OC 6 H 5 ( 4 ), NC 4 H 8 O ( 5 ), NHCH 2 –C 4 H 7 O ( 6 ), N(CH 3 )(C 6 H 11 ) ( 7 ), NHCH 2 –C 6 H 5 ( 8 ), and 2‐NH‐NC 5 H 4 (…
Thermotropic liquid crystals possess superior foaming capability without the aid of surfactants because of the anisotropic molecular structures. We developed a T-junction microfluidic device to inject gas bubbles of uniform size into a liquid crystal in the nematic and the smectic phases. The bubble size is primarily…
Effect of Ba substitution on the multiferroic properties of non-epitaxially grown polycrystalline Bi1−xBaxFeO3 (BBFO) films on refined Pt(111) electrode buffered glass substrates is studied. The structural analysis shows that a pure perovskite phase is present for BBFO films (x = 0.05-0.15), and (110) preferred orient…
The electronic structure of Na2Ti2Sb2O single crystal is studied by photon energy and polarization dependent angle-resolved photoemission spectroscopy (ARPES). The obtained band structure and Fermi surface agree well with the band structure calculation of Na2Ti2Sb2O in the non-magnetic state, which indicates that ther…
The effects of chemistry, substrate, and processing conditions on through‐thickness cation distributions are explored in solution‐derived morphotropic composition lead zirconate titanate (PZT) films. Films prepared from chelate‐based and conventional sol–gel chemistries were spin cast onto Pt/ZnO/SiO 2 /Si and Pt/Ti/S…
We present electrical transport measurements of a van-der-Waals heterostructure consisting of a graphene nanoribbon separated by a thin boron nitride layer from a micron-sized graphene sheet. The interplay between the two layers is discussed in terms of screening or, alternatively, quantum capacitance. The ribbon can…
In the present work silver nanoparticles (cubes and spheres) with sizes of 40 ± 5 nm have been synthesized by a similar experimental method in order to optimize both the photoluminescence and photoelectric conversion enhancement factor of poly(3-hexylthiophene) photoelectrodes with thickness comparable to those used i…
The ultrafast dynamics of photoexcited carriers closely depends on the excitation processes pertaining to the energy band of the materials and the relevant relaxation pathway relies on the interactions between hot carriers and lattice phonons. By using ultrafast optical-pump terahertz (THz)-probe spectroscopy with an…
To have precise atomic layer control over interfaces, we examine the growth of complex oxides through the sequential deposition from binary targets by pulsed laser deposition. In situ reflection high-energy electron diffraction (RHEED) is used to control the growth and achieve films with excellent structural quality.…
Abstract Multicomponent segmented polyurethanes ( SPUs ) based on poly(ethylene glycol), poly( l ‐lactide) and poly(trimethylene carbonate) as macrodiols, 2,4‐toluene diisocyanate (2,4‐ TDI ) or 1,6‐hexane diisocyanate ( HDI ) as diisocyanate, and 1,4‐butanediol ( BDO ) or 2,2‐bis(hydroxymethyl)propionic acid ( DMPA )…
Clay samples from Tharaka-Nithi County in Kenya were characterized by hydrometer, X-ray fluorescence spectroscopy (XRF), atomic absorption spectroscopy (AAS), TGA, scanning electron microscopy (SEM) and powder diffraction (XRD) methods. The F-test and t-test were used to interpret the results. The major oxides present…
Colloidal solutions of Ce-doped titanate nanosheets (Ce-TNS) with tiny dimensions (<10 nm) were fabricated through a hydrolysis reaction of titanium tetraisopropoxide and Ce(NO3)3, and their annihilation activity for reactive oxygen species (ROS) was investigated. The obtained Ce-TNS had an akin crystal structure to l…
High performance active materials are of rapidly growing interest for applications including soft robotics, microfluidic systems, and morphing composites. In particular, paraffin wax has been used to actuate miniature pumps, solenoid valves, and composite fibers, yet its deployment is typically limited by the need for…
Abstract A Salen‐type [Salen = N , N ′‐ethylene bis(salicylideneimine)] mononuclear lanthanide(III)‐based Zn‐Dy‐Zn complex [Dy(ZnL) 2 (CH 3 COO)Cl 2 ] · CH 2 Cl 2 ( 1 ) was prepared [H 2 L = N , N ′‐bis(3‐ethoxysalicylidene)phenylene‐1,2‐diamine]. Single‐crystal X‐ray diffraction analysis revealed that Dy III was sand…
Magnetic and dielectric properties of the hexagonal triangular lattice antiferromagnet $2H\text{\ensuremath{-}}{\mathrm{AgFeO}}_{2}$ have been studied by neutron diffraction, magnetic susceptibility, specific heat, pyroelectric current, and dielectric constant measurements. The ferroelectric polarization, $P\ensuremat…
We investigate the atomic and electronic structure of ultra-thin ZnO films (1 to 4 layers) on the (111) surfaces of Ag, Cu, Pd, Pt, Ni, and Rh by means of density-functional theory. The ZnO monolayer is found to adopt an α-BN structure on the metal substrates with coincidence structures in good agreement with experime…
Porous graphene “pottery” is prepared via a process imitating traditional pottery preparation technology. This method is simple, cheap, scalable, and eco-friendly. The “pottery” of porous graphene materials has an ultrahigh mass density, a large SSA, good conductivity, and unique anisotropic electrical and mechanical…
Nano-TiO2 has been reported to be an efficient photocatalyst, which is able to produce reactive oxygen species (ROS) under UVA irradiation. In this study, we investigated the effects of nano-TiO2 on the cytotoxicity, induction of apoptosis, and the putative pathways of its actions in HaCaT cells. We show that nano-TiO…
Silver-chitosan nanocomposites colloidal was successfully performed by chemical reduction method at room temperature using glucose as reducing agent, sodium hydroxide (NaOH) as accelerator reagent, silver nitrate (AgNO3) as metal precursor and chitosan as stabilizing agent. Compared to other synthetic methods, this wo…
The pressure-induced phase transition of the multiferroic manganese tungstate ${\mathrm{MnWO}}_{4}$ is studied on single crystals using synchrotron x-ray diffraction and Raman spectroscopy. We observe the monoclinic $P2/c$ to triclinic $P\overline{1}$ phase transition at 20.1 GPa and get insight on the phase transitio…