Materials Literature
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Magnetization reversal and exchange coupling are investigated in Pr-Fe-B melt-spun ribbons. In nanocomposite magnets, not only does the coercivity decrease but also magnetization reversal becomes more non-uniform in hard grains. The non-uniform magnetization reversal, resulting in a deterioration of squareness in hyst…
Abstract The development of synthetic routes for the tailoring of efficient silica‐based heterogeneous catalysts functionalized with coordination complexes or metallic nanoparticles has become a important goal in chemistry. Most of these techniques have been based on postsynthetic treatments of preformed silicas. Neve…
The hexagonal high-temperature polymorph of LiBH 4 is stabilized by solid solution with LiI to exhibit superionic Li + ionic conductivity at room temperature. Herein, the mechanisms for the Li + diffusion are investigated for the first time by density functional theory (DFT) calculations coupled to quasi-elastic neutr…
Supramolecular conjugation between native protein concanavalin A (ConA) and synthetic polymer PEG (polyethylene glycol) was achieved by dual molecular recognition interactions via a linker, βCD-Man, of which β-cyclodextrin (βCD) and α-mannopyranoside (Man) recognized the adamantane (Ada) end of PEG and lectin ConA ort…
We survey our recent theoretical studies on the generation and detection of coherent radial breathing mode (RBM) phonons in single-walled carbon nanotubes and coherent radial breathing like mode (RBLM) phonons in graphene nanoribbons. We present a microscopic theory for the electronic states, phonon modes, optical mat…
Abstract Hybrid PbS nanocrystal/C 60 fullerite photodetectors are fabricated using a simple one‐step drop casting procedure onto pre‐patterned interdigitated electrodes. The devices exhibit a broad spectral response from the near UV through to the near infrared yielding a detectivity, D* , of above 10 10 Jones from 40…
The stress pulse attenuation of the 62 vol/vol. % dense silica particle-ethylene glycol suspension was investigated by using a modified spilt Hopkinson pressure bar. In comparison to the neat ethylene glycol solution, the transmission pulse of the shear thickening is much weaker under the same impact condition. No ene…
We present a detailed analysis of glass transitions induced by pinning particles at random from an equilibrium configuration. We first develop a mean-field analysis based on the study of p-spin spherical disordered models and then obtain the three-dimensional critical behavior by the Migdal-Kadanoff real space renorma…
Reorientation correlation times in protein solutions are key determinants for feasibility and quality of NMR experiments. Yet, their accurate estimate is not easy, especially in the case of very large proteins. We show that nuclear magnetic relaxation dispersion (NMRD) can accurately determine reorientation times up t…
Surface structures and surface interactions are key factors that influence the reactivity and stability of nanomaterials. Combining experimental and theoretical investigations, we illustrate the roles of surface interactions in the formation and phase stability of an unusual TiO2(B) polymorph that preferentially expos…
We report on the transport properties of clean, epitaxial Fe(Se,Te) thin films prepared on Fe-buffered MgO (001) single crystalline substrates by pulsed laser deposition. Near ${T}_{\mathrm{c}}$ a steep slope of the upper critical field for $H||ab$ was observed (74.1 T/K), leading to a very short out-of-plane coherenc…
Cax(Sr0.5Ba0.5)1−xNb2O6 [CSBN(x), x = 0.00, 0.10, 0.15, and 0.20] lead-Free ceramics were prepared by a traditional solid-state reaction technique. Dielectric, ferroelectric, and pyroelectric properties of CSBN(x) lead-Free ceramics were systematically investigated. The pyroelectric properties of CSBN(x) have been enh…
A facile and effective approach for the improvement of localized surface plasmon resonance (LSPR) biosensors based on silver-core and gold-shell nanoparticles (Ag@AuNPs) on a glass substrate was investigated. Silver nanoparticles (core) with thin gold shells on a transparent indium tin oxide (ITO) coated glass surface…
We present first-principle calculations on symmetric tilt grain boundaries (GBs) in bcc Fe. Using density functional theory (DFT), we studied the structural, electronic and magnetic properties of Σ3(111) and Σ11(332) GBs formed by rotation around the [110] axis. The optimized structures, GB energies and GB excess free…
We demonstrate that photon antibunching observed for individual nanocrystal quantum dots (NQDs) can be transformed into photon bunching characterized by super-Poissonian statistics when they are coupled to metal nanostructures (MNs). This observation indicates that, while the quantum yield of a biexciton (Q(2X)) is lo…
Abstract The literature of low‐dimensional CuII molecular magnetic systems in which superexchange pathways involve halide ions and/or cyclic 1,4‐diazines is reviewed. Compounds are organized by lattice type between 1D systems (including uniform and alternating chains, and ladders) and 2D systems (including square and…
Cerium oxide nanoparticles (nanoceria) possess catalytic and regenerative radical scavenging activities. The ability of nanoceria to maintain cellular redox balance makes them ideal candidates for treatment of retinal diseases whose development is tightly associated with oxidative damage. We have demonstrated that our…
Protein-protein imprinting of silk fibroin is introduced as a rapid, high-throughput method for the fabrication of nanoscale structures in silk films, through the application of heat and pressure. Imprinting on conformal surfaces is demonstrated with minor adjustments to the system, at resolutions comparable to other…
We calculate the finite-frequency conductivity of bilayer graphene with a relative twist between the layers. The low-frequency response at zero doping shows a flat conductivity with value twice that of the monolayer case and at higher frequency a strong absorption peak occurs. For finite doping, the low-frequency flat…
Together we are strong: Immediately after high-temperature reduction, ZnPd/ZnO catalysts are not notably CO2 selective in the methanol steam reforming process. Under methanol steam reforming conditions, high CO2 selectivity can only be achieved by the rather slow formation of ZnO patches on the surface of intermetalli…