Materials Literature
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Highly fluorescing biological labels with excitation in near-infrared window II have attracted the interest of scientific community as they are capable of increasing both penetration depth and imaging quality. However, studies on the utilization of quantum dots (QDs) in biological imaging appear to be rather limited t…
Gold nanorods (AuNRs) have been largely investigated driven by their promising potentials in drug delivery, imaging, and photodynamic therapy because of their distinctive physicochemical properties. It is widely known that AuNRs can be taken up by different cells, however, the trafficking of the nanorods in cells are…
Ag/Ag2S hybrid nanostructures have recently received much attention, because of their synthetically tunable plasmonic properties and enhanced chemical stability. Sulfidation of pregrown Ag nanocrystals is a facile process for making Ag/Ag2S nanostructures. Understanding the sulfidation process can help in finely contr…
Auger recombination (AR) can be an important loss mechanism for optoelectronic devices, but it is typically not very efficient at low excitation densities. Here we show that in conductive quantum-dot solids, AR is the dominant charge carrier decay path even at excitation densities as low as 10⁻³ per quantum dot, and t…
Quantum-confined graphene-like electronic states are directly observed in graphene oxide and photothermally reduced graphene oxide via transient spectroscopy. An unexpected novel hybrid state arising from amorphous carbon-like peripheral structure with high sp(3) /sp(2) carbon ratio in close vicinity of confined graph…
Understanding in vivo drug release kinetics is critical for the development of nanoparticle-based delivery systems. In this study, we developed a fluorescence resonance energy transfer (FRET) imaging approach to noninvasively monitor in vitro and in vivo cargo release from polymeric nanoparticles. The FRET donor dye (…
Abstract The aim of this study is to investigate the effect of surface modification through sodium hydroxide (NaOH) treatment and fiber length on the tensile strength of coir fiber of reinforced epoxy composites. The coir fibers were treated with 2%, 4%, 6%, 8%, and 10% concentration of NaOH separately for 10 days. Th…
The development of effective and alternative tissue-engineered skin replacements to autografts, allografts and xenografts has became a clinical requirement due to the problems related to source of donor tissue and the perceived risk of disease transmission. In the present study 3D tissue engineered construct of serici…
Repair or replacement of damaged tissues using tissue engineering technology is considered to be a fine solution for enhanced treatment of different diseases such as skin diseases. Although the nanofibers made of synthetic degradable polymers, such as polylactic acid (PLA), have been widely used in the medical field,…
The concept of the electromagnetic wave transparency is introduced into the thermal field. The conditions of the thermal transparency for a multilayered sphere with isotropic coatings, a coated spheroid with an isotropic coating, and a coated sphere with a radial anisotropic core or a radial anisotropic coat are deduc…
Heterogeneous catalysts play an important role in surface catalytic reactions, but selective bond breaking and control of reaction products in catalytic processes remain significant challenges. High-vacuum tip-enhanced Raman spectroscopy (HV-TERS) is one of the best candidates to realize surface catalytic reactions. H…
The solubility of nifedipine (NIF) in binary mixtures of ethanol (EtOH) + water and propylene glycol (PG) + water at 293.2, 298.2, 303.2, 308.2, and 313.2 K was measured. The Jouyban–Acree model and its combination with van’t Hoff equation was used to predict the solubility of NIF in the mixed solvents at different te…
A neutron scattering investigation of the magnetoelectric coupling in PbFe${}_{1/2}$Nb${}_{1/2}$O${}_{3}$ has been undertaken. Ferroelectric order occurs below 400 K, as evidenced by the softening with temperature and subsequent recovery of the zone center transverse optic phonon mode energy ($\ensuremath{\hbar}{\ensu…
We present a comprehensive study of the adsorption behavior of iron phthalocyanine on the low-index crystal faces of silver. By combining measurements of the reciprocal space by means of photoelectron momentum mapping and low energy electron diffraction, the real space adsorption geometries are reconstructed. At monol…
We present a general formalism of ultrafast diffractive voltammetry approach as a contact-free tool to investigate the ultrafast surface charge dynamics in nanostructured interfaces. As case studies, the photoinduced surface charging processes in oxidized silicon surface and the hot electron dynamics in nanoparticle-d…
An amino-acid-based (11-(4-(pyrene-1-yl)butanamido)undecanoic acid) self-repairing hydrogel is reported. The native hydrogel, as well as hybrid hydrogels, have been thoroughly characterized by using various microscopic techniques, including transmission electron microscopy (TEM), atomic force microscopy (AFM), Raman s…
Bloch points are magnetic topological defects. The discrete nature of a magnetic lattice creates a periodic potential that can pin a Bloch point. The pinning force is of the order of the exchange constant, a few piconewtons in a typical ferromagnet (permalloy). A domain wall containing a Bloch point can have a sizable…
The aim of this review article is to assess the descriptive capabilities of the Hubbard-rooted LDA+U method and to clarify the conditions under which it can be expected to be most predictive. The paper illustrates the theoretical foundation of LDA+U and prototypical applications to the study of correlated materials, d…
Using advanced first-principles calculations we predict that the nonpolar SrTiO${}_{3}$/SrZrO${}_{3}$ (001) interface, designed as either thin SrZrO${}_{3}$ film deposited on SrTiO${}_{3}$ or short-period (SrTiO${}_{3}$)${}_{m}$/(SrZrO${}_{3}$)${}_{n}$ superlattice, hosts a two-dimensionally confined electron gas. Mob…
The screening properties and collective excitations (plasmons) in AA-stacked bilayer graphene are studied within the random phase approximation. Whereas long-lived plasmons in single-layer graphene and in AB-stacked bilayer graphene can exist only in doped samples, we find that coherent plasmons can disperse in AA-sta…