Materials Literature
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We propose a scheme to implement quantum computation in graphene nanoribbon (GNR). It is shown that an electron or hole can be naturally localized in each zigzag region for a GNR with a sequence of Z-shaped structures, without using confined gates. A one-dimensional graphene quantum dot chain is formed in such a GNR,…
This paper presents a tutorial discussion of the principles underlying the depth-dependent Kikuchi pattern formation of backscattered electrons in the scanning electron microscope. To illustrate the connections between various electron diffraction methods, the formation of Kikuchi bands in electron backscatter diffrac…
Bilayer graphene (BLG) has recently attracted a great deal of attention because of its electrically tunable energy gaps and its unusual electronic structure. In this Rapid Communication we present analytical and semianalytical expressions, based on the four-band continuum model, for the layer-sum and layer-difference…
A pi-conjugated organogelator (1) was synthesized, and its gelation ability was checked. It was found that it is an excellent gelator for some organic solvents, such as dichloromethane, benzene, o-dichlorobenzene, and DMSO/water. It can self-assemble into 1-D nanofibers induced by hydrogen bonding and pi-pi interactio…
This article describes the use of a fluorescent nanoprobe as a functional biomarker for the identification of increased vascular permeability in cancer/arthritis disease models. Synthesis of the fluorescent nanoprobe was achieved by passive loading of a fluorophore inside the nanoparticle using thin film hydration met…
The in vitro and in vivo efficiency of fibroin microparticles as a delivery carrier for bone morphogenetic protein-2 (BMP-2) was evaluated. BMP-2 was encapsulated in silk fibroin particles that were produced by a simple and very mild processing method. The dose-response of BMP-2-loaded fibroin particles was examined i…
Partial substitution of Ca with Sr in high permittivity Ca1−xSrxCu3Ti4O12 ceramics can lead to an anomalous increase in intrinsic bulk dielectric permittivity. The similar electron configuration of Ca and Sr excludes electronic structure variations as a source of this permittivity increase, and thus an alternative mec…
A one-step method to fabricate a biomimetic dual-scale hierarchical structure for a transparent anti-reflective, self-cleaning layer for organic solar cells is reported. Template-mediated UV replica molding is used to directly create a multi-functional surface with an acrylate-functionalized perfluoropolyether without…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTNonfouling Polyampholytes from an Ion-Pair Comonomer with Biomimetic Adhesive GroupsGuozhu Li†‡, Hong Xue†, Changlu Gao†, Fengbao Zhang‡, and Shaoyi Jiang*†View Author Information† Department of Chemical Engineering, University of W…
Exact (Hartree-Fock) exchange for correlated electrons is implemented to describe correlated orbitals in the projector augmented-waves (PAW) framework, as suggested recently in another context [P. Nov\'ak et al., Phys. Status Solidi B 243, 563 (2006)]. Hartree-Fock exchange energy is applied to strongly correlated ele…
The influence of the orthorhombic to tetragonal phase transition near room temperature in the poling process of KNN‐modified piezoceramics was studied. Poling temperatures of 25° and 120°C were used. The percentage of 90° domains reorientation induced by poling was evaluated trough X‐ray diffraction analysis. The impr…
LiNH2BH3·NH3BH3, synthesized by reacting LiH and 2 equiv of NH3BH3 or by reacting equiv LiNH2BH3 and NH3BH3, is composed of alternative LiNH2BH3 and NH3BH3 layers. The compound starts to release hydrogen at 57 °C and can desorb ca. 14.0 wt % hydrogen in a stepwise manner with peak temperatures at 80 and 140 °C, respec…
P-doped Si nanocrystals (radius <or=2 nm) were synthesized by depositing an ultrathin (0.3 nm) P- SiO(2) film close to each SiO layer of SiO/SiO(2) multilayers. During annealing P atoms migrate into the Si-rich region. Due to the low diffusivity of P in SiO(2), P atoms segregate in the Si nanocrystal region and are in…
A family of dimeric, peroxo-containing heteropolytungstates, [M(2)(O(2))(2)(XW(11)O(39))(2)](12-) [M = Zr(4+), X = Si (1), Ge (2); M = Hf(4+), X = Si (3)], have been synthesized by reacting ZrCl(4)/HfCl(4) with the respective monolacunary Keggin precursor [XW(11)O(39)](8-) (X = Si, Ge) in an aqueous acidic medium (pH…
Following the recent breakthrough of total structural determination of a Au-thiolate nanocluster [P. Jadzinsky et al., Science 318, 430 (2007)], extensive interests have been stimulated to unveil (or revisit) the structure-property relationship of various thiolate-Au nanostructures in light of the new finding of -SR-(…
Multiwalled carbon nanotube (MWCNT) based electrical double-layer capacitors (EDLCs) using ionic liquid incorporated magnesium ion conducting gel polymer electrolytes were constructed and characterized. For comparison, three electrolytes were used to fabricate EDLCs comprised of a room-temperature ionic liquid 1-ethyl…
We report the effect of water nanoconfinement on the thermal transport properties of two neighbor hydrophilic quartz interfaces. A significant increase and a nonintuitive, nonmonotonic dependence of the overall interfacial thermal conductance between the quartz surfaces on the water layer thickness were found. By prob…
We present a rapid and straightforward procedure for the synthesis of core-shell surface-enhanced Raman scattering (SERS) tags. SERS tags are combinations of Raman active dyes with metallic nanoparticles inducing the enhancement. Because of their significantly higher stability to environmental conditions, the majority…
Global hardness and softness and the associated hard/soft acid/base (HSAB) principle have been used to explain many experimental observed reactivity patterns and these concepts can be found in textbooks of general, inorganic, and organic chemistry. In addition, local versions of these reactivity indices and principles…
A novel water-bubble template process has been developed to synthesize uniform hierarchical hollow spheres of ZnO and transition metal doped ZnO in ethylene glycol. For undoped ZnO, nanorods are formed due to the preferred c -axial growth and assembled into highly regular hollow spheres. Co-doped ZnO, in contrast, fav…