Materials Literature
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Nanotechnology continues to offer new materials and applications that will benefit society, yet there is growing concern about the potential health and environmental impacts of production and use of nanoscale products. Although hundreds of studies of nanomaterial hazards have been reported, due (largely) to the comple…
Crystalline piezoelectric dielectrics electrically polarize upon application of uniform mechanical strain. Inhomogeneous strain, however, locally breaks inversion symmetry and can potentially polarize even nonpiezoelectric (centrosymmetric) dielectrics. Flexoelectricity---the coupling of strain gradient to polarizatio…
Recasting the double layer: The implicit assumption that electrochemical double layers are governed only by ion/electrode charge separation may be short-sighted and lead to a fundamental misunderstanding of the phenomenological response. This is shown in a study performed on ions confined in nanoporous carbon with por…
In this first systematic study, we describe the influence of various surfactants and polymers on aggregation stability and antibacterial activity of silver nanoparticles (NPs) prepared by a modified Tollens process. The surfactant/polymer stabilizing effect was monitored using the newly established method based on a t…
The nose bridge between the inlet valve and exhaust valve is the most fragile part on the cylinder head. Fatigue crack is the major failure mode. It is necessary to analyze the structure strength and reliability (SSR) of this zone. In this paper, a three-dimensional (3D) model for a engine cylinder head is built up us…
Abstract Dielectric and conduction properties of polyimide/silica nano‐hybrid films were investigated with the silica content and the testing frequency, using a small electrode system. The hybrid films were prepared through sol‐gel process and thermal imidization, by using pyromellitic dianhydride and 4,4′‐oxydianilin…
Surface enhanced spectroscopy is demonstrated by depositing gold nanoparticles on a surface using an atomic force microscope. A modified dip pen nanolithography process is used to place particles directly on to a target. Near-field optical enhancement is demonstrated for Raman and infrared spectroscopies and is applic…
As with the first edition, this textbook provides a clear introduction to the fundamental theory of structural analysis as applied to vehicular structures such as aircraft, spacecraft, automobiles and ships. The emphasis is on the application of fundamental concepts of structural analysis that are employed in everyday…
An experimental study has been carried out to evaluate the influence of confinement ofalumina ceramic tiles through polymer restraint, on its ballistic performance. Tiles of 99.5 per centpurity alumina were subjected to ballistic impact against 7.62 mm armour piercing projectiles atvelocities of about 820 m/s. The til…
The small-angle scattering of x-rays or neutrons from proteins in solution can provide important information about the structure of the protein and the nature of interactions or distance correlations among the protein molecules (1, 2). The former is encoded in the form factor [P(q)], and the latter in the structure fa…
We have investigated epitaxial Nd0.5Sr0.5MnO3∕SrTi0.9998Nb0.0002O3(110) (NSMO/Nb:STO) junctions wherein a metal-insulator transition can be induced by magnetic field in the NSMO layer. The NSMO/Nb:STO junctions show highly rectifying current density–voltage (J-V) characteristics, in accord with the conventional theory…
Ti 1 − x Co x O 2 − δ nanobelts were synthesized without using any metal catalysts by metallorganic chemical vapor deposition. The nanobelts consisted of ∼10–20nm nanocrystallites, which were dominantly rutile structure. The Ti0.986Co0.014O2−δ nanobelt sample showed a magnetic anisotropy with a high coercive field val…
Excitonic properties of colloidal silicon quantum dots (Si qdots) with mean sizes of $4\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ were examined using stationary and time-resolved optical spectroscopy. Chemically stable silicon oxide shells were prepared by controlled surface oxidation and silanization of HF-etched Si qdo…
The third-rank susceptibility tensor that describes the second-harmonic generation changes sign after an inversion operation indicating its sensitivity to twinning structures. Here, we show the far-field scattering patterns of second-harmonic (SH) radiation generated by single twinned and twin-free ZnO rods. The patte…
We study the magnetoresistance (MR) of a multiwalled carbon nanotube (MWNT) as a function of the angle $({\ensuremath{\theta}}_{\mathit{tilt}})$ between the external field $({B}_{\mathit{ext}})$ and the MWNT axis. With ${B}_{\mathit{ext}}$ oriented along the nanotube axis, its MR exhibits two symmetric (with respect t…
Various possible orientations of lamellar structures of diblock copolymers under shear are investigated with respect to their stability. A Brownian dynamics model is put forward in which each diblock is modeled as a dumbbell. The blobs in each dumbbell are held together by a finite extendable nonlinear elastic (FENE)…
Abstract Poly(phenylene sulfide)/ferrosoferric oxide composites (PPS/Fe 3 O 4 ) with various loading levels were prepared by melt compounding. The crystallization, thermal, and viscoelastic properties were characterized respectively by the DSC, DMA, TGA and parallel plate rheometer. The results reveal that the well‐di…
This work aims at investigating the thermal stresses induced within a four-layered thin-film thermoelectric cooler. The one-dimensional (1D) temperature and thermal-stress distributions are firstly analyzed under the consideration of Joule heating, the conduction heat transfer as well as Thomson heating. Followed are…
We present Raman and dielectric data on Ni-doped ZnO (Zn1−xNixO) ceramics as a function of Ni concentration (x=0.03, 0.06, and 0.10) and temperature. A mode (around 130cm−1) is identified as TA(M) [J. M. Calleja and M. Cardona, Phys. Rev. B 16, 3753 (1977)] and appears due to an antiferromagnetic phase transition at l…
Magnetostrictive-piezoelectric heterostructures show strong magnetoelectric (ME) interactions that are mediated by mechanical forces. The effect, in general, vanishes when magnetostriction saturates at high bias magnetic fields (H). Here, we report strong ME effects for H as high as 18kOe in bilayers of lead zirconate…