Materials Literature
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The role of copper in time dependent dielectric breakdown (TDDB) of a porous low-k dielectric with TaN/Ta barrier was investigated on a metal-insulator-metal capacitor configuration where Cu ions can drift into the low-k film by applying a positive potential on the top while they are not permitted to enter the low-k d…
Abstract The structural and electronic properties of layered C3N compound have been studied using ab initio pseudopotential density‐functional method within the local‐density approximation. Total energy, lattice constant, band structure, and electron density of state are calculated. Among three possible C3N monolayer…
In this study, we report the effects of the alkyl chain length on alkanethiol-capped gold nanoparticle Langmuir films. Gold nanoparticles (2-3 nm) capped with C(n)H(2n+1)SH (n = 5-12, 14-16, 18) were prepared via a two-phase synthesis. The films were sampled by Langmuir-Schaefer horizontal transfer at various points i…
Shape memory alloy braces and buckling restrained braces have been shown to exhibit favorable energy dissipating characteristics in steel structures. However, buckling restrained braces are unable to recover their original shape after unloading and consequently experience large residual inter-story drifts after the ea…
In this study, the nature of the hydroxyl groups present on γ-alumina, γ-Al 2 O 3, pretreated at various temperatures has been reinvestigated by 1 H NMR spectroscopy. The peaks are assigned by comparison between experimental and simulated spectra, in agreement with previous IR studies. The lowest chemical shifts δ cor…
We propose and demonstrate a new type of metalenses that are phase compensated by gradient index (GRIN) or inhomogeneous permittivity metamaterials. Both elliptically and hyperbolically dispersive GRIN metalenses for both internal and external focusing are studied. The requirements for the GRIN metalenses and the ligh…
The development of tumor-targeting drug delivery systems, able to selectively transport cytotoxic agents into the tumor site by exploiting subtle morphological and physiological differences between healthy and malignant cells, currently stands as one of the most attractive anticancer strategies used to overcome the se…
Summary The sensory attributes, mechanical, water vapour permeability (WVP) and solubility properties of cassava starch and soy protein concentrate (SPC)‐based edible films of varying levels of glycerol were studied. Addition of SPC and glycerol up to 30% and 20%, respectively, reduced stickiness and improved colour a…
This manuscript describes the synthesis (based on the intermatrix synthesis (IMS) method), optimization, and application to bacterial disinfection of Ag@Co polymer-metal nanocomposite materials with magnetic and bactericidal properties. This material showed ideal bactericide features for being applied to bacterial dis…
The influence of intracrystalline organic macromolecules on the microstructure and properties of host crystals has been investigated by micro- and macroscopic analyses for several biogenic calcites: prisms in the outer layers of pearl oysters ( Pinctada fucata ), oysters ( Crassostrea nippona ), and pen shells ( Atrin…
Polycrystalline samples of the clathrate Ba${}_{8}$Au${}_{x}$Si${}_{46\ensuremath{-}x}$ were synthesized for 0.2 \ensuremath{\leqslant} $x$ \ensuremath{\leqslant} 10. The homogeneity range of the type-I clathrate phase was determined to be 3.63 \ensuremath{\leqslant} $x$ \ensuremath{\leqslant} 6.10 after annealing at…
A red luminescent silver cluster was synthesized in milligram quantities by the direct core reduction of the most widely studied class of large silver nanoparticles, namely silver@citrate of tens of nanometres diameter. No byproducts such as thiolates were detected, unlike in the case of typical methods of making such…
The study of spin-related phenomena in materials requires knowledge of the precise form of effective spin-orbit coupling for conducting carriers in solid-state systems. We demonstrate theoretically that curvature induced by corrugations or periodic ripples in single-layer graphenes generates two types of effective spi…
Polymeric micelles formed by the self-assembly of amphiphilic block copolymers can be used to encapsulate hydrophobic drugs for tumor-delivery applications. Filamentous carriers with high aspect ratios offer potential advantages over spherical carriers, including prolonged circulation times. In this work, mixed micell…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Yu-feng Tian, Yong-feng Li, Tom Wu; Tuning magnetoresistance and exchange coupling in ZnO by dopi…
Ti–35Nb–7Zr–5Ta biomedical alloys were fabricated by spark plasma sintering of nanocrystalline powders by mechanical alloying. After 60 h milling, mixtures of respective elemental powders transformed into a homogeneous structure of completed β-Ti solid solution. The grain size of the milled powder was ∼9 nm. Subsequen…
An optically transparent crab-shell with an intact original shape and substantial morphological detail is presented. Inorganic calcium carbonate particles, proteins, lipids and pigments are removed from a native crab-shell, and the remaining chitin nanofibrous structure is impregnated by a monomer and polymerized. The…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation M. Rizzi, A. Spessot, P. Fantini, D. Ielmini; Role of mechanical stress in the resistance drift o…
Explosive welding technology has been widely used in industrial production. However, there is always a controversy on the mechanism of explosive bonding, whether explosive welding should belong to a kind of mature welding such as a fusion welding or a solid phase welding. Based on the observation and analysis of the m…
Abstract Five rare earth complexes are first introduced to catalyze ring opening polymerizations (ROPs) of γ‐benzyl‐L‐glutamate N‐carboxyanhydride (BLG NCA) and L‐alanine NCA (ALA NCA) including rare earth isopropoxide (RE(OiPr)3), rare earth tris(2,6‐di‐tert‐butyl‐4‐methylphenolate) (RE(OAr)3), rare earth tris(borohy…