Materials Literature
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A green synthesis process was developed for the production of PVP-coated noble metal nanoparticles in the form of stable nanosols. Water is the environmentally benign solvent; glucose serves as a mild, renewable and non-toxic reducing agent and microwave irradiation is an effective and fast heating technique. The same…
For over five decades, molecular dynamics (MD) simulations have helped to elucidate critical mechanisms in a broad range of physiological systems and technological innovations. MD simulations are synergetic with experiments, relying on measurements to calibrate their parameters and probing "what if scenarios" for syst…
In this paper, the mechanism of growth strain is discussed based on the irreversible evolving equations by considering the coupling effects of stress and chemical reaction during isothermal oxidation, and a simple model relating the growth strain and the oxide thickness is developed. If the effect of the stress on the…
We investigate the optical emission and decay dynamics of excitons confined in large strain-free GaAs quantum dots grown by droplet epitaxy. From time-resolved measurements combined with a theoretical model we show that droplet-epitaxy quantum dots have a quantum efficiency of about 75% and an oscillator strength betw…
Dual-resolution approaches for molecular simulations combine the best of two worlds, providing atomic details in regions of interest and coarser but much faster descriptions of less-relevant parts of molecular systems. Given the abundance of water in biomolecular systems, reducing the computational cost of simulating…
Reaction of tetrazole-1-acetic acid (1-Htza) with a Cu(II) salt in ionic liquids with different anions, [BMIM]X (BMIM = 1-butyl-3-methylimidazolium; X = Br−, BF4−, NTf2− (NTf2− = bis((trifluoromethyl)sulfonyl)amide)), afforded five Cu(II) coordination compounds, [Cu2(1-tza)4]Br·H3O·1/3H2O (1), [Cu2(1-tza)4]BF4·H3O·H2O…
Porous titania nanohybrids (NHs) were successfully prepared by hybridizing the exfoliated titania nanosheets with anatase TiO2 nanoparticles. Various characterizations revealed that the titania NHs as photoanodes play a trifunctional role (light harvesting, dye adsorption, and electron transfer) in improving the effic…
Low-dimensional carbon-based nanomaterials have recently received enormous attention for biomedical applications. However, increasing evidence indicates that they are cytotoxic and can cause inflammatory responses in the body. Here, we show that monocrystalline nanodiamonds (NDs) synthesized by high-pressure-high-temp…
We present experimentally and theoretically the evolution of high spatial frequency periodic ripples (HSFL) fabricated on SiC crystal surfaces by irradiation with femtosecond laser pulses in a vacuum chamber. At early stages the seed defects are mainly induced by laser pulse irradiation, leading to the reduction in th…
Five new metal–organic frameworks (MOFs) have been synthesized by using cadmium ion and 2,5-furandicarboxylic acid in presence of a variety of bridging amine ligands, [Cd(fdc)(2,2′-bpy)(H 2 O)] n ( 1 ), {[Cd(fdc)(pyz)(H 2 O) 2 ][Cd(fdc)](H 2 O) 2 ]·H 2 O} n ( 2 ), {[Cd(fdc)(4,4′-bpy)(H 2 O) 2 ]·EtOH} n ( 3 ), [Cd(fdc)…
Magnetic microspheres with an Fe 3 O 4 core and a SiO 2 –TiO 2 hybrid shell were prepared by a surfactant-assisted aerosol process and subsequent etching treatment. The core–shell spheres with robust and chemically stable Ti–O–Si shells exhibit excellent adsorption performance toward basic dyes. The maximum adsorption…
Thermosensitive hydrogels based on chitosan are of great interests for injectable implant drug delivery. The poly(ethylene glycol)-grafted-chitosan (PEG-g-CS) hydrogel was reported as a potential thermosensitive system. The objective of the present study is to evaluate the cytotoxicity, in vivo degradation and drug re…
The formation of the surface-induced stratified lamellar composition profile experimentally evidenced in spincoated layers of the photovoltaic donor–acceptor blend consisting of poly[(9,9-dioctylfluorenyl-2,7-diyl)- co -5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole]/phenyl-C61-butyric acid methyl ester (APFO-3/PCB…
CuInS2 quantum-dot sensitized TiO2 photoanodes with In2S3 buffer layer were in situ prepared via chemical bath deposition of In2S3, where the Cd-free In2S3 layer then reacted with TiO2/CuxS which employed a facile SILAR process to deposit CuxS quantum dots on TiO2 film, followed by a covering process with ZnS layer. P…
Carboxylic acid is a common ligand anchoring group used to functionalize nanoparticle surfaces. Its binding structure and mechanism as a function of the oxidation states of metal oxide nanoparticle surfaces are not well characterized. Here we present an in situ sum-frequency generation vibrational spectroscopy (SFG-VS…
In nature, the protonation of oxo bridges is a commonly encountered mechanism for fine-tuning chemical properties and reaction pathways. Often, however, the protonation states are difficult to establish experimentally. This is of particular importance in the oxygen evolving complex of photosystem II, where identificat…
Alteration zones of archeological glasses often show intriguing lamellar patterns in backscattered electron images. Here, we report results of static glass corrosion experiments with two different silicate glasses that revealed laminar porosity and subordinately chemical patterns inside silica‐based corrosion zones th…
We present one-shot $GW$ calculations of the bulk electronic structure of the topological insulators Bi${}_{2}$Se${}_{3}$ and Bi${}_{2}$Te${}_{3}$ within the all-electron full-potential linearized augmented-plane-wave formalism. We compare three different ways of treating the spin-orbit interaction in calculating the…
Organic thin‐film electroluminescent (EL) devices, such as organic light‐emitting diodes (OLEDs), typically operate using constant voltage or direct current (DC) power sources. Such approaches require power converters (introducing power losses) and make devices sensitive to dimensional variations that lead to run away…
We have examined the significant enhancement of ambipolar charge injection and transport properties of bottom-contact single crystal field-effect transistors (SC-FETs) based on a new rubrene derivative, bis(trifluoromethyl)-dimethyl-rubrene (fm-rubrene), by employing carbon nanotube (CNT) electrodes. The fundamental c…