Materials Literature
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We report a X-ray absorption study at Ti K- and L 2,3 -edges to determine the role of TiO 2 content as a nucleating agent in glass ceramics. It is found that the local Ti environment is not modified with TiO 2 addition, indicating that medium range organization is responsible for its ability to promote internal versus…
We confirm that graphene is a good carrier for laying molecular monolayers of an explosive, 1,3,5-triamino-2,4,6-trinitrobenzene (TATB), attributed to the strong chemical bonding of π−π stacked attraction between the TATB/graphene layers. And we report some predicted properties of a supermolecular complex of the TATB/…
We present a facile approach to transform multilayer graphene to single-layer graphene in a gradual thinning process. Our technique is based upon gradual etching of multilayer graphene in a hydrogen and nitrogen plasma environment. High resolution transmission microscopy, selected area electron diffraction and Raman s…
Ideal Al-doped ZnO (AZO) thin films should have high carrier mobility and carrier concentration, as well as high thermal and chemical stability. To achieve these properties, ZnO should be heavily doped with Al and perfectly crystallized. Through analyzing the possible valence state of the elements and local lattice st…
The hydrolysis of the carboxylic ester bond, by a base or catalyzed by an enzyme under weak basic conditions, serves as the only path to obtain a novel anisotropic supramolecular hydrogel that is stable over a wide pH range. This result not only expands the molecular scope of supramolecular hydrogelators but also illu…
We report a novel method for cap exchange of emissive semiconductor nanocrystals (NCs) using thiol functional ligands metalated with zinc. Utilizing this method, the NCs can be several times brighter and much more resistant to precipitation compared to control samples. This method has been applied using a variety of c…
Low temperature oxygen ionic conductors are key materials for the development of the next generation solid oxide fuel cells. In this regard, SrMO 2.5 ( M = Fe,Co) systems with a Brownmillerite-type structure are able to reversibly intercalate oxygen in an electrochemical reaction at room temperature to reach SrMO 3 st…
We have studied the effect of disorder on the martensitic transformation (MT), especially on the hysteretic behavior of Ti-Nb-O alloy. This system allows arbitrary tuning of the amount of disorder by the introduction of interstitial oxygen atoms into elastically soft host lattice [$\text{Ti-}26\text{Nb}\text{ }(\text{…
Abstract Waterborne polyurethane (PU) dispersions were prepared from isophorone diisocyanate (IPDI), 2‐ bis (hydroxymethyl) propionic acid (DMPA), 1,4‐butane diol (BD), poly(propylene glycol) (PPG), and triethylamine (TEA) by means of phase inversion through the acetone process. Changes in DMPA content, initial PU con…
This study reports the fabrication and characterization of LaOCl–NiO composite and LaNiO3 nanofiber mats and their potential applications for p-type gas sensors and electrochemical capacitors. One-dimensional LaOCl–NiO composite and LaNiO3 fibers were prepared via the electrospinning of LaNiO3 precursor/poly(vinyl ace…
An ordered nanostructure can be created from the hybrid materials of self-assembly poly(3-hexyl thiophene-b-2-vinyl pyridine) and nicotinic acid-modified titanium dioxide nanoparticles (P3HT-b-P2VP/TiO(2)). TEM and XRD analyses reveal that the TiO(2) nanoparticles (NPs) are preferentially confined in the P2VP domain o…
This work presents a new methodology to design patterned circular polarizers consisting of in-cell polarizers, in-cell retarders and biaxial films to achieve very wide viewing freedom for stereoscopic 3D color LCDs. The biaxial films with least materials and simple fabrication concepts are employed for off-axis compen…
We present a survey of results from various research groups under the unifying viewpoint of transformational physics, which has been recently introduced for the design of metamaterials in optics and acoustics. We illustrate the versatility of underlying geometric transforms in order to bridge wave phenomena (the diffe…
We report the observation of a long-range magnetic order in a quasicrystalline approximant, i.e., ${\text{Cd}}_{6}\text{Tb}$, demonstrating that a spin glass is not the ground state for the binary approximant but localized spins on the vertices of an icosahedron become antiferromagnetically ordered below 24 K. The res…
A slow-release formula of potential biological pesticide Pyoluteorin (Plt) was prepared by using nanophase material of silicon dioxide loading drugs. The final experimental formula was m(Plt:Brij56:TMOS:HCl(aq)) = 0.04:1.4:2:1, synthesized by a highly ordered monolith (HOM) method. This formula can continuously releas…
The structure of [Fe(Htrz) 2 (trz)]BF 4 ( 1, Htrz =1,2,4-4-H-triazole, trz = 1,2,4-triazolate) at the low-spin (LS) and high-spin (HS) states and structural transitions between the two states were investigated by in situ high-resolution synchrotron X-ray powder diffraction (XRPD) combined with Raman spectroscopy using…
Cauliflower-like cadmium sulfide (CdS) microspheres composed of nanocrystals have been successfully synthesized by a hydrothermal method using poly(ethylene glycol) (PEG) as the template coordination agent and characterized by a variety of methods. Our experiments confirmed that the size of the CdS microspheres could…
Ion irradiation of semiconductors is a well understood method to tune the carrier concentration in a controlled manner. We show that the ferromagnetism in GaMnAs films, known to be hole-mediated, can be modified by He ion irradiation. The coercivity can be increased by more than three times. The magnetization, Curie t…
A spatially resolved electroluminescence (EL) imaging experiment is developed to measure the local sheet resistance of the window layer, directly on the completed CIGS cell. Our method can be applied to the EL imaging studies that are made in fundamental studies as well as in in-line process inspection (1-3). The EL e…
We present a x-ray dichroism study of graphite surfaces that addresses the origin and magnitude of ferromagnetism in metal-free carbon. We find that, in addition to carbon {pi} states, also hydrogen-mediated electronic states exhibit a net spin polarization with significant magnetic remanence at room temperature. The…