Materials Literature
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The feasibility of applying laser-induced phosphorescence in a combustion environment was shown by testing the consistency of the emission–temperature relations of thermographic phosphor particles (YAG:Dy). The relations were calibrated before and after the phosphor particles had passed a flame front. The calibrations…
Abstract A synthetic protocol for the preparation of hetero‐biofunctional protein–polymer conjugates is described. A chain transfer agent, S , S ‐bis (α,α′‐dimethyl‐α″‐acetic acid) trithiocarbonate was functionalized with α,ω‐pyridyl disulfide (PDS) groups, Subsequently, one of the PDS groups was covalently attached t…
Conjugated polymer films of unsubstituted and alkoxy-substituted poly( p -phenylene) have been prepared via a Kumada-type catalyst-transfer polycondensation in a grafting-from configuration. A surface-bound external initiator was formed by reacting a Ni(0) complex with a thienyl bromide monolayer, and this surface-bou…
A new family of polyimides having two bulky groups in the central ring of a m -terphenyl moiety has been obtained. These polyimides have been synthesized by reaction of four commercial diamines with the electrophilic monomer, 5′- t -butyl-2′-pivaloylimino-3,4,3′′,4′′- m -terphenyltetracarboxylic acid dianhydride ( PTP…
It is shown that the lines of adsorbed hydrogen pair atoms divide a graphene sheet into electronically independent strips and form an electron waveguide or 2H-line graphene-based superlattice (2HG-SL). We investigated the electronic properties of such structures in detail. The electronic spectra of a “zigzag” ( n,0)-2…
We have reported here, for the first time, the parallel and perpendicular orientation preferences of two planar and unhindered imidazoles as axial ligands (L) while coordinated toward iron(III) and iron(II) porphyrins, respectively, in a nonplanar porphyrinic environment. The synthesis and characterization of low-spin…
Abstract Nucleation characteristics of isotactic polypropylene (iPP) nucleated by the α/β compounded nucleating agents (NAs) were investigated by wide‐angle X‐ray scattering, differential scanning calorimetry and mechanical testing. The results showed that the nucleation effect of the α/β compounded NAs depends on not…
A targeted dendrimeric anticancer prodrug, a conjugate of generation 5 (G5) polyamidoamine (PAMAM) dendrimer, folic acid (FA), and methotrexate (MTX), has been successfully synthesized by using a novel "one pot" approach which is simple, reproducible, and feasible for large-scale synthesis. All dendrimer products have…
We report an experimental and theoretical lattice-dynamics study of yttrium orthovanadate $({\text{YVO}}_{4})$ up to 33 GPa together with a theoretical study of its structural stability under pressure. Raman-active modes of the zircon phase are observed up to 7.5 GPa, where the onset of an irreversible zircon-to-schee…
Much progress has been made recently in the study of the effects of electron-phonon (el-ph) coupling in doped insulators using angle resolved photoemission (ARPES), yielding evidence for the dominant role of el-ph interactions in underdoped cuprates. As these studies have been limited to doped Mott insulators, the imp…
Magnetism is not usually expected in simple sp oxides like MgO or in carbons like graphite. Yet basic intrinsic defects in these systems can be magnetic in ways that seem to be shared by more complex oxides. A second puzzle comes from reports of possible room temperature ferromagnetism in simple oxides, where experime…
The application of colloidal nanocrystals in various devices requires their assembly into well-defined mono- or multilayers. We explore the possibilities of the Langmuir-Schaefer technique to make such layers, using CdSe quantum dots as a model system. The layer quality is assessed using atomic force microscopy, trans…
We report transport measurements on etched graphene nanoribbons. We show that two distinct voltage (i.e. energy) scales can be experimentally extracted for characterizing the parameter regions of suppressed conductance at low charge density in graphene nanoribbons. The energy scales are related to the charging energy…
The present paper reports on the spatially controlled synthesis of silver nanoparticles (NPs) and silver nanowires by photosensitized reduction. In a first approach, direct photogeneration of silver NPs at the end of an optical fiber was carried out. Control of both size and density of silver NPs was possible by chang…
This review covers some of the basic theoretical aspects of the electronic and magnetic structure of graphene nanoribbons, starting from the simplest tight-binding models to the more sophisticated ones where the electron–electron interactions are considered at various levels of approximation. Nanoribbons can be classi…
This study demonstrates that collagen, the most abundant protein in animals, exists as a distribution of nanoscale morphologies in teeth, bones, and tendons. This fundamental characteristic of Type I collagen has not previously been reported and provides a new understanding of the nanoscale architecture of this ubiqui…
We review the tight-binding model of bilayer graphene which describes four low-energy electronic bands near the corner of the first Brillouin zone. The model takes into account terms arising from nearest and next-nearest neighbour hopping within each layer, non-orthogonality of atomic orbitals, various inter-layer cou…
The polymer-derived ceramics (PDCs) route has been combined with a warm-pressing process to synthesize for the first time boron nitride workpieces avoiding the conventional sintering process. A polyborazylene was synthesized with a controlled degree of cross-linking suitable to be warm-pressed into cylindrical green b…
Abstract Great achievements have been made in the research of biobased thermoplastic polymers, but the progress concerning thermosetting resins has been minor. In particular, research on high‐performance thermosetting polymers from renewable feedstock has not been reported elsewhere. A novel biobased epoxy was synthes…
Introduction Although studied less than aquatic diatoms, aerial diatoms are discussed in an extensive literature. Most publications on the topic consist merely of floristic lists. Thus our understanding of aerial diatom ecology is meager. Given the brevity of the current chapter, it is not possible to list all of the…