Materials Literature
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We analyze a possibility of gain-induced compensation of losses in a one-dimensional layered structure, consisting of alternating layers of metal and dielectric with gain. Using an exact approach without effective medium approximations, we demonstrate that losses can be completely compensated for a certain value of th…
We show through both theoretical arguments and numerical calculations that graphene discerns an unconventional sequence of quantized Hall conductivity, when subject to both magnetic fields ($B$) and strain. The latter produces time-reversal symmetric pseudo/axial magnetic fields ($b$). The single-electron spectrum is…
Biomaterials that can stimulate stem cell differentiation without growth factor supplementation provide potent and cost-effective scaffolds for regenerative medicine. We hypothesize that a scaffold prepared from cellulose and silk blends can direct stem cell chondrogenic fate. We systematically prepared cellulose blen…
Intensity spikes in Raman scattering, accompanied by switching between line spectra and band spectra, can be assigned to shorting the junction plasmon through molecular conductive bridges. This is demonstrated through Raman trajectories recorded at a plasmonic junction formed by a gold AFM tip in contact with a silver…
The self-assembly in water of designed peptide amphiphile (PA) C16-ETTES containing two anionic residues and its mixtures with C16-KTTKS containing two cationic residues has been investigated. Multiple spectroscopy, microscopy, and scattering techniques are used to examine ordering extending from the β-sheet structure…
Cell adhesion is a dynamic process that results from specific interactions between cell sur‐ face molecules and their appropriate ligands. Adhesion can be found between adjacent cells (cell-cell adhesion) as well as between cells and the extracellular matrix (ECM) (cell-matrix adhesion). Adhesion is an extremely impor…
A biomaterial is any material that comprises whole or part of a living structure or biomedi‐ cal device which performs, augments, or replaces a natural function to improve the quality of life of the patients [1]. Over the past fifty years biomaterials has been developed as a sci‐ ence with various forms of implants/me…
In this work we find that polyaniline (PANI), synthesized by aniline chemical polymerization at a surface of template polycarbonate (PC) particles, is significantly different in molecular weight, structural order, oxidation state, and conductivity from a neat PANI. Molecular weight of the PANI phase in the composite (…
Polyurethanes are a family of polymers used in a variety of biomedical applications but mainly in the cardiovascular field due to their good physicochemical and mechanical properties in addition to a good biocompatibility. Traditionally, segmented polyur‐ ethanes (SPUs), have been used in cardiovascular applications (…
Atomic-resolution structural and spectroscopic characterization techniques (scanning transmission electron microscopy and electron energy loss spectroscopy) are combined with nanoscale electrical measurements (conductive atomic force microscopy) to study at the atomic scale the properties of graphene grown epitaxially…
techniques 2.1. Conventional fabrication techniques Many techniques are available to process synthetic and natural biomaterials into various scaffolds. These include conventional techniques, such as solvent-casting and particulateleaching [6], gas foaming [7], phase separation [8], melt molding [9], and freeze drying…
The document gives definitions of terms met in the conventional thermal and thermomechanical characterisation of polymeric materials.
A new family of boron difluoride-rigidified dyes, phenanthro[9,10-d]imidazole-quinoline boron difluoride (PQBD), with solid-state fluorescence has been designed and synthesized. The novel series of PQBD are advantageous over the typical boron difluoride-rigidified dyes such as BODIPYs in terms of large Stokes shift an…
Long-range corrected (LC) hybrid functionals and asymptotically corrected (AC) model potentials are two distinct density functional methods with correct asymptotic behavior. They are known to be accurate for properties that are sensitive to the asymptote of the exchange-correlation potential, such as the highest occup…
The paradoxically low basicity (despite high anionicity) of oxygen in the characteristic Si-O-Si linkages of silicone polymers is investigated with hybrid density functional and natural bond orbital (NBO) computational methods, extending a previous study of idealized disiloxane and dimethyl ether parent species to ful…
Magnesium and its alloys are candidate materials for biodegradable implants; however, excessively rapid corrosion behavior restricts their practical uses in biological systems. For such applications, surface modification is essential, and the use of anticorrosion coatings is considered as a promising avenue. In this s…
The intrinsic interfacial thermal resistance at graphene/organic interfaces, as a result of mismatches in the phonon vibrational spectra of the two materials, diminishes the overall heat transfer performance of graphene/organic nanocomposites. In this paper, we use molecular dynamics (MD) simulations to design alkyl-p…
A common problem with implants is that bacteria can form biofilms on their surfaces, which can lead to infection and, eventually, to implant rejection. An interesting strategy to inhibit bacterial colonization is the immobilization of silver (Ag) species on the surface of the devices. The aim of this paper is to inves…
Here, we adapt the concept of transformational thermodynamics, whereby the flux of temperature is controlled via anisotropic heterogeneous diffusivity, for the diffusion and transport of mass concentration. The n-dimensional, time-dependent, anisotropic heterogeneous Fick's equation is considered, which is a parabolic…
The crystal structure of sodium bismuth titanate (NBT) and related compounds is of great interest, as these may form part of a new generation of ferroelectric materials used in a multitude of piezoelectric applications. This work examines the short- and long-range structure of sodium bismuth titanate in different stat…