Materials Literature
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Both pure and mixed CeO 2 –Fe 2 O 3 were prepared for CO 2 reduction to CO by chemical looping. The crystallographic structure of the investigated materials was monitored in situ during H 2 reduction and CO 2 oxidation. A solid solution of iron in ceria was identified. Up to 70 wt % CeO 2, a distinct Fe 2 O 3 hematite…
Light extraction efficiency (LEE) in AlGaN deep-ultraviolet (DUV) light-emitting diodes (LEDs) is investigated using finite-difference time-domain simulations. For flip-chip and vertical LED structures, LEE is obtained to be <10% due to strong DUV light absorption in the p-GaN layer. In flip-chip LEDs, LEE of transver…
Abstract The design and fabrication of synthetic structural components often result in homogeneous materials with uniform microstructures and properties. In contrast, nature has evolved structural composites exhibiting rich heterogeneous architectures and tunable site‐specific properties. Creating synthetic systems wi…
A thermodynamic analysis of continuous fuel production by redox cycling of ceria in a single solar reactor under isothermal conditions is presented. Ceria is partially reduced in a sweep gas flow of purified nitrogen and reoxidized with either steam or carbon dioxide to produce hydrogen or carbon monoxide, respectivel…
Wharton's jelly (WJ) is a gelatinous tissue within the umbilical cord that contains myofibroblast-like stromal cells. A unique cell population of WJ that has been suggested as displaying the stemness phenotype is the mesenchymal stromal cells (MSCs). Because MSCs' stemness and immune properties appear to be more robus…
Seminal recent studies that have shed new light on the remarkable properties of clay interactions suggest unexplored opportunities for biomaterial design and regenerative medicine. Here, recent conceptual and technological developments in the science of clay interactions with biomolecules, polymers, and cells are exam…
1. Introduction 2. Synthesis of Novel Nanostructured Carbon Materials 2.1. Carbon Nanotubes 2.2. Graphene 2.3. Ordered Mesoporous Carbon 2.4. Carbon Hierarchy 2.5. Macroscopic Shaping of Nanocarbon 3. Functionalization of Nanocarbon Materials 3.1. Liquid-Phase Functionalization of Nanocarbon 3.2. Gas-Phase Functionali…
Through atomization and ionization, we could completely alter the composition of a nonconductive material, aluminum nitride, by femtosecond laser ablation. Preferential production of pure aluminum cluster cations Al n + ( n ≤32) reflects not only their higher energetic stability compared with mixed clusters Al n N m +…
Elastic waves propagating in graphene nanoribbons were studied using both continuum modeling and molecular dynamics simulations. The Mindlin's plate model was employed to model the propagation of interior waves of graphene, and a continuum beam model was proposed to model the propagation of edge waves in graphene. The…
An analytical model, validated by experiments and finite element simulations, is developed to study the thermal imaging of single-walled carbon nanotube (SWNT) devices by scanning Joule expansion microscopy (SJEM). A simple scaling law for thermal expansion at low frequencies, which only depends on two nondimensional…
A hybrid structure composed of ordered C11b Ti2Ni and Ti5Ni3 substructures for the G-P zones precipitated in Ti-rich Ti–Ni shape memory ribbons is proposed to explain the appearance of extra diffuse scattering streaks in transmission electron microscopy observations. The point defects of Ni vacancies and Ti antisites,…
The electronic conductance of polymer--carbon nanotube multilayered composite films assembled by the spin-spray layer-by-layer method is investigated. Our measurements show that the film conductance per bilayer ${\ensuremath{\sigma}}_{1}$ vanishes for film thickness below a critical value, and above this threshold it…
Homojunction transparent thin-film In2O3 transistors were fabricated at room temperature. Self-assembled In2O3 source–channel–drain structures were grown by pulsed electron beam deposition using a shadow mask with a 300 µm diameter wire as an obstacle placed at ∼100 µm distance from the substrate for growing the chann…
Abstract The effects of zinc oxide addition and sintering parameters on the structure and dielectric properties of barium titanate are observed. Different percentage of ZnO ranging from 0.30 to 1 wt. % is doped in barium titanate. Both the doped and undoped samples are sintered at temperatures ranging from 1250°C to 1…
High-quality planar alignment was achieved in the hexagonal columnar phase of 2,3,6,7,10,11-hexahexyloxytriphenylene by applying an oscillating shear using a piezoelectric actuator. Discotic liquid crystals with thicknesses up to 38 µm could be aligned using this technique, with the molecular columns aligning parallel…
Rapid Single-Stage Separation of Micrometer-Long and High-Purity Semiconducting Carbon Nanotubes by Gel Filtration, Thendie, Boanerges, Miyata, Yasumitsu, Kitaura, Ryo, Miyauchi, Yuhei, Matsuda, Kazunari, Shinohara, Hisanori
In Fe-based superconductors, electron doping is often realized by the substitution of transition-metal atoms for Fe. In order to investigate how the electronic structure of the parent compound is influenced by Zn substitution, which supplies nominally four extra electrons per substituted atom but is expected to induce…
An approach to fabricate Ba0.5Sr0.5TiO3 (BST) films with a preferred orientation on a glass substrate by pulsed laser deposition was developed. To ensure a preferred crystallographic orientation, we utilized a molecularly thin Ca2Nb3O10 perovskite nanosheet as a seed layer and successfully fabricated BST films with a…
Regioregular polythiophenes containing an optically active substituent in the third position of the thiophene ring, head-to-tail poly(3-[2-((S)-1-methyloctyloxy)ethyl]thiophene)s (HT-P(S)MOETs), were synthesized using highly reactive zinc. For comparison, HT-P(R)MOET and achiral HT-P(±)MOET also were synthesized from…
Lithium vanadoxide bismuth borate glasses with composition (30-x)Li 2 O • xV 2 O 5 • 50B 2 O 3 • 20Bi 2 O 3 (x=5, 10, 15) has been prepared with the traditional melt-quenching technique.The density measurements were performed using Archimedes Principal and using density data molar volume was calculated.To determine th…