Materials Literature
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This study focuses on the deformation mechanisms of nanotwinned Cu with hierarchical twins (HTs) by virtue of a series of large-scale molecular dynamics (MD) simulations. For the same grain size dG and the same secondary twin spacing L2, two softening stages and one strengthening stage are discovered, accompanied by t…
Polyhydroxyalkanoate (PHA) synthases (PhaCs) catalyze the formation of biodegradable PHAs that are considered to be ideal alternatives to non-biodegradable synthetic plastics. However, study of PhaCs has been challenging because the rate of PHA chain elongation is much faster than that of initiation. This difficulty,…
Graphene field effect transistors are considered as a candidate for future high-frequency applications. For their realization, the optimal combination of substrate, graphene preparation, and insulator deposition and composition is required. This optimization must be based on an in-depth characterization of the obtaine…
It is shown that it is in principle possible to produce combined sources of polarization and magnetization that are not only radiationless but that have any (and sometimes several) of the four microscopic or macroscopic electromagnetic fields exactly zero. The conditions that such a "null-field radiationless source" m…
Abstract Nanocomposite membranes, prepared from carbon nano‐powders (CnP) or carbon nano‐fibers (CnF) dispersions in polystyrene sulfonate (PSS), were evaluated as sensing platforms. Composite surfaces were analyzed by scanning electron microscopy and field‐emission electron microscopy. Electrical and electrochemical…
Recently, the surface of carbon fibre composite tiles of the toroidal pump limiter of Tore Supra has been analysed by scanning electron and atomic force microscopies. In regions where fibres are perpendicular to the surface, a specific erosion pattern has been observed. It is constituted of a striation oriented with a…
Natural fibres and biodegradable matrices are being considered nowadays as substitutes to synthetic fibre reinforced polymer composites mainly in sectors where high load carrying capacity and high strength are not prerequisites. Present study utilizes biodegradable matrix composite prepared by varying the weight of th…
Herein, we have implemented a modified sandwich strategy for surface enhanced Raman scattering (SERS) studies aimed at the accomplishment of remarkably enhanced vibrational signatures from preferred Raman probes. Here, para -phenylenediamine (or PDA) has been selected as the test molecule which can concurrently bind t…
Abstract We report density functional theory calculations of the electronic properties of doped heterostructures of monolayer molybdenum disulphide and hexagonal boron nitride (h‐BN). Extending on a recent study, we investigate the effect of doping the h‐BN layer on the electronic structure of the MoS 2 subsystem by a…
Thermal transport across the interfaces between few-layer graphene sheets and soft materials exhibits intriguing anomalies when interpreted using the classical Kapitza model, e.g. the conductance of the same interface differs greatly for different modes of interfacial thermal transport. Using atomistic simulations, we…
In the current work, we demonstrate how coordination chemistry can be employed to direct self-assembly based on strong hydrophobic interactions. To investigate the influence of coordination sphere geometry on aqueous self-assembly, we synthesized complexes of the amphiphilic perylene diimide terpyridine ligand with th…
BACKGROUND: One of the strategies for survival stress conditions in bacteria is a regulatory adaptive system called general stress response (GSR), which is dependent on the SigB transcription factor in Bacillus sp. The GSR is one of the largest regulon in Bacillus sp., including about 100 genes; however, most of the g…
The synthesis, structural characterization, and excited-state dynamics of series of diketopyrrolopyrrole (DPP) bridged homodinuclear Ir(III) and heterodinuclear Ir(III)/Pt(II) complexes is described. Steady-state and time-resolved photoluminescence along with transient absorption measurements were used to probe the na…
Fenton-chemistry-based detemplation combined with secondary treatments offers options to tune the hierarchical porosity of SBA-15. This approach has been studied on a series of SBA-15 mesophases and has been compared to the conventional calcination. The as-synthesized and detemplated materials were studied with regard…
Abstract ABA triblock copolymers of polylactides ( PLA : A) and aliphatic polycarbonates ( APC : B) were prepared by ring‐opening polymerization of d ‐ and l ‐lactides with poly(hexamethylene carbonate) diol and poly(hexamethylene/pentamethylene carbonate) diol ( PHPC ) as macro‐initiators. The enantiomeric copolymers…
Infrared radiation is used to radiatively transfer heat to a nanometric power generator (NPG) device with a thermoelectric Nb-doped TiO2 film deposited by atomic layer deposition (ALD) as the active element, onto a borosilicate glass substrate. The linear rise of the produced voltage with respect to the temperature di…
Graphene and porous carbon materials are widely used as electrodes in supercapacitors. In order to form mechanically stable electrodes, binders can be added to the conducting electrode material. However, most binders degrade the electrical performance of the electrodes. Here we show that by using nanofibrillated cellu…
In this work, a carbon nanotube modified by inorganic acids ( m -CNT) was blended with poly(1,4-butylene terephthalate) (PBT) and aluminum phosphinate (AlP) to prepare the flame retarded composites. Morphological observations revealed that both the m -CNT and AlP particles were homogeneously dispersed in PBT matrix. D…
A polar cobalt(II) phosphonate Co(bamdpH2)(H2O) (1) [bamdpH4 = (benzylazanediyl)bis(methylene)diphosphonic acid] is reported. It shows a linear chain structure. The neighboring chains are connected by moderately strong hydrogen bonds forming a supramolecular layer. The interlayer spaces are filled with the organic gro…
Nucleation of the γ-form in isotactic polypropylene (PP) under high pressure was investigated. Three nucleating agents were used to nucleate crystallization of PP under atmospheric pressure: commercial Hyperform HPN-20E from Milliken Chemical, poly(tetrafluoroethylene) particles nucleating the α-form, and calcium pime…