Materials Literature
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We have performed $^{69,71}\mathrm{Ga}$ nuclear magnetic resonance (NMR), nuclear quadrupole resonance (NQR), and muon spin rotation and resonance on the quasi-two-dimensional antiferromagnet $\mathrm{Ni}{\mathrm{Ga}}_{2}{\mathrm{S}}_{4}$, in order to investigate its spin dynamics and magnetic state at low temperature…
A new hybrid spherical structure α-Fe(2)O(3)@SiO(2)@Au with a size of about 141 nm was designed, with a hematite cubic core surrounded by a thick silica shell and further decorated with gold nanoparticles. The monodisperse α-Fe(2)O(3)@SiO(2) spheres were first prepared by a sol-gel process based on the modified Stöber…
Raw, pre-roasted and roasted Cocoa samples were separated into four different molecular weight fractions (> 30, 30-10, 10-5 and < 5 kDa) with ultrafiltration and tested for their antibacterial, mutagenic, as well as their radical-scavenging effects. Radical-scavenging effects were tested with electro paramagnetic reso…
We have investigated the optical response of thiolate self-assembled monolayers (SAMs) deposited from the liquid phase on well characterized, (111)-textured gold films based on the use of in situ and ex situ optical spectroscopic ellipsometry. We considered SAMs formed by several molecules with thiol functionality, fo…
Ferromagnetic resonance (FMR) derivative linewidths were measured from $3\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}12\phantom{\rule{0.3em}{0ex}}\mathrm{GHz}$ on $50\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ thick sputtered polycrystalline Fe-Ti-N films with $3\phantom{\rule{0.3em}{0ex}}\mathrm{at.}\p…
The morphological evolution of a GaAs surface induced by a focused ion beam (FIB) has been investigated by in situ electron microscopy. Under off-normal bombardment without sample rotation, Ga droplets with sizes from 70 to 25 nm in diameter on the GaAs surface can self-assemble into a highly ordered hexagonal pattern…
Molecular dynamics (MD) simulations have been employed to investigate the melting behavior of core−shell Pt−Au nanoparticles with four different concentrations: Pt 13 Au 548, Pt 55 Au 506, Pt 147 Au 414, and Pt 309 Au 252 . The icosahedral core−shell structures, with an icosahedral Pt core covered with an icosahedral…
Molecular dynamics (MD) simulations have been performed to investigate the structure and dynamics of an energetic ionic liquid, 1-hydroxyethyl-4-amino-1,2,4-triazolium nitrate (HEATN). The generalized amber force field (GAFF) was used, and an electronically polarizable model was further developed in the spirit of our…
This paper thoroughly investigates the impact of the winding layer number and the choice of magnet type on the performance characteristics of surface permanent magnet (SPM) machines with fractional slot concentrated windings designed for wide speed ranges of constant-power operation. This is accomplished by carefully…
A simple, sequential approach for creation of hydrolytically degradable poly(ethylene glycol) (PEG) hydrogels has been developed and characterized. The chemistry involves an initial step growth polymerization reaction between PEG-diacrylate and dithiothreitol (DTT) to form acrylate-terminated (-PEG-DTT-)n PEG chains,…
In situ forming hydrogels based on thermosensitive polymers have attractive properties for tissue engineering. However, the physical interactions in these hydrogels are not strong enough to yield gels with sufficient stability for many of the proposed applications. In this study, additional covalent cross-links were i…
High-performance microprocessor families employ dynamic-thermal-management techniques to cope with the increasing thermal stress resulting from peaking power densities. These techniques operate on feedback generated from on-die thermal sensors. The allocation and the placement of thermal-sensing elements directly impa…
A gold nanohole array is functionalized with a cortisol thiol derivative, and binding to a monoclonal antibody is conveniently detected using the sensitive shift in the 1060 nm transmission peak of the array. Detection is also enhanced 3-fold by the application of a secondary antibody-gold nanoparticle conjugate. This…
Because of their unique photophysical properties, organic semiconductors have shown great promise in both light-emitting devices (LEDs) and photovoltaic systems. In particular, the question of spin statistics looms large in these applications: the relative energetics and rates of formation for singlet versus triplet e…
We report upper critical field B(c2)(T) measurements on a single-crystalline sample of the ferromagnetic superconductor UCoGe. B(c2)(0) obtained for fields applied along the orthorhombic axes exceeds the Pauli limit for B parallela,b and shows a strong anisotropy B(c2)(a) approximately B(c2)(b)>>B(c2)(c). This provide…
Four novel copper tetrazole-1-acetic acid (Htza) coordination polymers, namely, {[Cu(tza) 2 (Htza) 2 ]·2H 2 O} n ( 1 ), [Cu(tza) 2 ] n ( 2 ), {[Cu 4 (tza) 4 (CH 3 COO) 2 (μ 3 -OH) 2 (H 2 O) 2 ]·2H 2 O} n ( 3 ), and {[Cu 4 (tza) 6 (μ 3 -OH) 2 ]·4H 2 O} n ( 4 ), were synthesized as pH-dependent products and characterize…
Short range surface plasmon resonators are investigated at the nanometer scale. Gold nanorods (30 nm in diameter) were microfabricated and probed by photoemission electron microscopy under direct laser light excitation. Resonances presenting various numbers of lobes occur for specific rod lengths. A simple analytical…
We have discovered functionalized multiwalled carbon nanotubes with reduced protein-binding, cytotoxicity, and immune response and the associated structure-activity relationships using in silico surface molecular diversity design, combinatorial library synthesis, and multiple biological screenings. Our results demonst…
This paper evaluates the design of a new segmented interior permanent magnet (SIPM) machine with very wide constant power operation range. The machine uses segmentation of the rotor magnets with the help of iron bridges between magnet segments. This provides for an inherent flux-weakening capability to the interior pe…
Tissue engineering aims at replacing or regenerating tissues lost due to diseases or traumas (Langer and Vacanti, 1993). However, mimicking in vitro the physiological complexity of vascularized tissue is a major obstacle, which possibly contributes to impaired healing in vivo. In higher organisms, native features incl…