Materials Literature
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The dipeptide amphiphile Fmoc-Leu-Gly-OH has been induced to self-assemble into thin surface-supported hydrogel gel films and gap-spanning hydrogel membranes. The thickness can be closely controlled, giving films/membranes from tens of nanometers to millimeters thick. SEM and TEM have confirmed that the dipeptides sel…
This book provides a background in the mechanics of solids for students of mechanical engineering, while limiting the information on why materials behave as they do. It is assumed that the students have already had courses covering materials science and basic statics. Much of the material is drawn from another book by…
Upconversion luminescence tuning of beta-NaYF(4) nanorods under 980 nm excitation has successfully been achieved by tridoping with Ln(3+) ions with different electronic structures. The effects of Ce(3+) ions on NaYF(4):Yb(3+)/Ho(3+) as well as Gd(3+) ions on NaYF(4):Yb(3+)/Tm(3+)(Er(3+)) have been studied in detail. B…
Piezoelectric generators enable maintenance‐free power supply for integrated electronics in smart system applications. The majority of publications consider the aspect of power transfer electronics; however, the influence of the transducer materials was rarely described. Recently, material characteristics received inc…
Abstract Incorporating colloidal CdSe quantum dots (QDs) into CdSe nanowire (NW)‐based photoelectrochemical solar cells increases their incident‐photon‐to‐carrier conversion efficiencies (IPCE) from 13% to 25% at 500 nm. While the effect could, in principle, stem from direct absorption and subsequent carrier generatio…
A series of open-framework aluminoborates (ABOs) [M(dien)(2)][AlB(6)O(11)(OH)] (M=Co (I a), Ni (I b), Cd (I c), Zn (I d); dien=diethylenetriamine) and [M(en)(3)][AlB(7)O(12)(OH)(2)] (H(2)O)(0.25) (M=Co (II a), Ni (II b); en=ethylenediamine) have been made under hydrothermal conditions and characterized by elemental an…
Novel functional polymeric nanocarriers with ionic cores containing biodegradable cross-links were developed for delivery of chemotherapeutic agents. Block ionomer complexes (BIC) of poly(ethylene oxide)-b-poly(methacylic acid) (PEO-b-PMA) and divalent metal cations (Ca(2+)) were utilized as templates. Disulfide bonds…
Following the Dirac-Frenkel time-dependent variational principle, dynamics of a one-dimensional Holstein polaron is probed by employing the Davydov D2 Ansatz with two sets of variational parameters, one for each constituting particle in the exciton-phonon system, and a simplified variant of the Davydov D1 Ansatz, also…
We show that the information gained in spectroscopic experiments regarding the number and distribution of atomic environments can be used as a valuable constraint in the refinement of the atomic-scale structures of nanostructured or amorphous materials from pair distribution function (PDF) data. We illustrate the effe…
This article reviews the current status of spin dynamics in semiconductors which has achieved a lot of progress in the past years due to the fast growing field of semiconductor spintronics. The primary focus is the theoretical and experimental developments of spin relaxation and dephasing in both spin precession in ti…
Recent developments in tissue engineering approaches frequently revolve around the use of three-dimensional scaffolds to function as the template for cellular activities to repair, rebuild and regenerate damaged or lost tissues. While there are several biomaterials to select as three-dimensional scaffolds, it is gener…
In this work, we investigated the temperature dependence of the upper critical field ${\ensuremath{\mu}}_{0}{H}_{c2}(T)$ of ${\text{Fe}}_{1.02(3)}{\text{Te}}_{0.61(4)}{\text{Se}}_{0.39(4)}$ and ${\text{Fe}}_{1.05(3)}{\text{Te}}_{0.89(2)}{\text{Se}}_{0.11(2)}$ single crystals by measuring the magnetotransport propertie…
Nitrogen doped carbon nanotubes (N-CNTs) have become a topic of increased importance in the study of carbonaceous materials. This arises from the physical and chemical properties that are created when N is embedded in a CNT. These properties include modified chemical reactivity and modified conductivity and mechanical…
Ultrafast two-color pump-probe measurements, involving coherent acoustic phonon waves, have provided information simultaneously on the mechanical properties and on the electronic structure of ferromagnetic ${\text{Ga}}_{1\ensuremath{-}x}{\text{Mn}}_{x}\text{As}$. The elastic constants ${C}_{11}$ of ${\text{Ga}}_{1\ens…
We present extensive numerical studies to determine the phase diagrams of cubic and hexagonal blue phases in an electric field. We confirm the earlier prediction that hexagonal phases, both two and three dimensional, are stabilized by a field, but we significantly refine the phase boundaries, which were previously est…
A small number of type I collagen-glycosaminoglycan scaffolds (collagen-GAG scaffolds; CGSs) have unusual biological activity consisting primarily in inducing partial regeneration of organs in the adult mammal. Two of these are currently in use in a variety of clinical settings. CGSs appear to induce regeneration by b…
A vertically aligned ZnO/ZnS core/shell nanowire array with type II band alignment was directly synthesized on an indium-tin-oxide glass substrate and the photovoltaic effect of the nanowire array was investigated. The epitaxial relationship, wurtzite (0001) matching zinc-blende (111), was observed in the ZnO/ZnS nano…
The magneto-oscillations in graphene bilayers are studied in the vicinity of the K and K' points of the Brillouin zone within the four-band continuum model ased on the simplest tight-binding approximation involving only the nearest neighbor interactions. The model is employed to construct Landau plots for a variety of…
We study the velocity dependence of the frictional force of the tip of an atomic force microscope as it is dragged across a surface, taking into account memory effects and thermal fluctuations. Memory effects are described by a coupling of the tip to low frequency excitation modes of the surface in addition to the cou…
Using a first-principle approach beyond density functional theory we calculate the electronic and optical properties of small diameter CdSe nanowires. Our results demonstrate how some approximations commonly used in bulk systems fail at this nanoscale level and how indispensable it is to include crystal local fields a…