Materials Literature
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We studied the nonlinear time-resolved luminescence signals due to multiexciton recombination processes in single-walled carbon nanotubes (SWNTs) using femtosecond excitation correlation (FEC) spectroscopy. From theoretical analysis of the FEC signals, we found that the FEC signals in the long time range are dominated…
We are reporting ultrafast charge carrier and charge transfer dynamics of the CdTe quantum dot (QD) and type II CdTe/CdS core−shell QD materials with different shell (CdS) thicknesses. Herein, we have synthesized CdTe and CdTe/CdS core−shell quantum dots by using 3-mercaptopropionic acid as a capping agent. Steady sta…
Adsorption of human lysozyme on hydrophobic graphite is investigated through atomistic computer simulations with molecular mechanics (MM) and molecular dynamics (MD) techniques. The chosen strategy follows a simulation protocol proposed by the authors to model the initial and the final adsorption stage on a bare surfa…
Noncollinear frustrated magnets are proposed as a new class of spintronic materials with high magnetoresistance which can be controlled with relatively small applied voltages. It is demonstrated that their magnetic configuration strongly depends on position of the Fermi energy and applied voltage. The voltage induced…
Phonon-carrier interactions can have significant impact on device performance. They can be probed by measuring the phonon lifetime, which reflects the interaction strength of a phonon with other quasi-particles, in particular charge carriers as well as its companion phonons. The carrier phonon and phonon-phonon contri…
We study the effects of doping and confinement on the thermoelectric properties of nanocrystalline semiconductors. We calculate the thermopower and figure of merit for temperatures less than the charging energy. For weakly coupled semiconducting grains it is shown that the figure of merit is optimized for grain sizes…
A simple and effective template-mediated protocol has been developed for the large-scale, room-temperature preparation of high-aspect-ratio, single-crystalline Tb-doped CePO(4) nanowires, measuring approximately 12 nm in diameter and over 10 mum in length. Moreover, we also isolated sheaf-like bundles of nanostructure…
Spin transport experiments in graphene, a single layer of carbon atoms ordered in a honeycomb lattice, indicate spin-relaxation times that are significantly shorter than the theoretical predictions. We investigate experimentally whether these short spin-relaxation times are due to extrinsic factors, such as spin relax…
The limit to which the phase change memory material Ge(2)Sb(2)Te(5) can be scaled toward the smallest possible memory cell is investigated using structural and optical methodologies. The encapsulation material surrounding the Ge(2)Sb(2)Te(5) has an increasingly dominant effect on the material's ability to change phase…
The catalytic CO oxidation results revealed that nanosized ceria-lanthana (CL) solid solution exhibits superior catalytic performance and thermal stability in comparison to ceria-zirconia (CZ) solid solution. The rationale for excellent catalytic behavior of the CL sample was elucidated from the viewpoint of structure…
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The thermoelectric properties of carbon nanotube (CNT)-filled polymer composites can be enhanced by modifying junctions between CNTs using poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS), yielding high electrical conductivities (up to approximately 40000 S/m) without significantly altering thermopo…
A novel "structural difference-based selective etching" strategy has been developed to fabricate hollow/rattle-type mesoporous nanostructures, which was achieved by making use of the structural differences, rather than traditional compositional differences, between the core and the shell of a silica core/mesoporous si…
Abstract Stents or metal endoprotheses are currently used to prevent restenosis after percutaneous transluminal angioplasty (PTA). Recently multi‐component systems comprising implant applications, e. g., stents, protective and/or a drug containing layers, have found wide‐spread application. Permanent and biocompatible…
We report a two-step process for the growth/patterning of Ni honeycomb nanostructures on various substrates, such as carbon paper, carbon nanotubes (CNTs), silicon wafers, and copper grids, via the combination of a sputter-coating/patterning technique and a replacement reaction solution method. The morphology, crystal…
Particles combining multiple anisotropy dimensions offer possibilities for self-assembly that have not been extensively explored to date. The scope for assembly of microparticles in which the anisotropy dimensions of internal bond angle and chemical ordering have been varied is investigated. Colloidal assemblies with…
(Solid + liquid) phase equilibrium (SLE) has been measured for 4-chloro-2-benzofuran-1,3-dione anhydride and 5-chloro-2-benzofuran-1,3-dione anhydride using differential scanning calorimetry (DSC) over the whole concentration range. It was found that this system is a simple eutectic system. The eutectic point is at T…
Selective noncatalytic reduction (SNCR) for nitrogen oxides (NOx) abatement, using urea (the NOxOUT process) as an N-agent was conducted experimentally on a multifunctional combustion facility. Results showed that the NOxOUT process resulted in 90.1% NO reduction at 1,273 K if the N-agent-to-NO mole ratio (NSR) varied…
ABSTRACT The low‐cycle fatigue behaviour of a duplex stainless steel was comparatively studied in standard heat‐treated and isothermally aged (at 475 °C for 100 h) conditions by mechanical testing, scanning and transmission electron microscopy. It was established that fatigue life is longer in the aged condition as co…
We present a systematic theoretical study of response properties of $\ensuremath{\alpha}$-quartz ${\text{SiO}}_{2}$ to an external static electric field in the framework of the density functional theory. The distortions of the electron density and crystalline structure by the application of the field are investigated…