Materials Literature
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To improve the thermal stability and lower the melting temperature of ion salts for using as ionic liquids (ILs), we designed an efficient filler based on octa-substituted polyhedral oligomeric silsesquioxane (POSS). Accordingly, the sulfonic acid-presenting POSS showed superior properties as a filler for improving th…
Nanocrystals are known to alter the relative stability of bulk solid phases. Here we test the limits of this effect on Ag2Se nanocrystals, a promising new electronic and infrared material. In the bulk, Ag2Se exhibits a solid-solid phase transition to a superionic conducting phase at moderate temperatures. We map this…
In this article, we demonstrate a simple and cost-effective approach to fabricate antireflective polymer coatings. The antireflective surfaces have 3D structures that mimick moth compound eyes. The fabrication is easily performed via a one-step imprinting process. The 3D arrays exhibit better antireflective performanc…
A series of polyindole/graphene oxide (GO) nanocomposites (PINCs) were synthesized through cetyltrimethylammonium bromide assisted dilute solution polymerization method, in presence of different concentrations of GO (%,w/w) ranging from 5.0 to 20.0 and ferric chloride as an oxidant. The interactions between polyindole…
Although the graphene-based materials have a great potential to be used for various energy storage devices, the expected performance of graphene has not been achieved yet seemingly due to the lack of interconnected porosity and actively-exposed surface area that should be developed in the re-stacked graphene electrode…
Non-equilibrium state defines physical properties of materials in many technologies, including architectural, metallic, and semiconducting amorphous glasses. In contrast, crystalline electronic and energy materials, such as transparent conductive oxides (TCO), are conventionally thought to be in equilibrium. Here, we…
A series of Ca2SrAl2O6:Ce(3+),Li(+),Mn(2+) phosphors have been synthesized by traditional solid state reactions. The structure and photoluminescence properties of the samples together with the energy transfer from Ce(3+) to Mn(2+) ions have been investigated in detail. The obtained phosphors can be excited efficiently…
In this Letter, by employing a combination of typical treatments and sensitive defect characterization, we discriminate between the roles of different kinds of intrinsic defects in ZnO. Thereby, we offer convincing experimental evidence that the green luminescence can originate from VO, VZn, and Oi-related defects, co…
The first example of a Pd-catalyzed Tsuji-Trost reaction, applied in a photochromic micellar media under conventional heating and microwave irradiation, is reported. The surfactant activity and recycling ability were investigated and compared with those of a few commercially available surfactants. The synthetic photoc…
We have designed and synthesized bis-pyrene derivatives, where the two pyrene units are connected by para-phthaloyl (p-BP) and meta-phthaloyl (m-BP) linkers. The compound p-BP in the condensed state does not respond to mechanical shearing. The fluorescence emission of supramolecular aggregates of compound m-BP in the…
Actinide complexes of a small-cavity, dipyrrolide macrocycle exhibit unusual bent metallocene-type binding, or bis(arene)-type binding, or both at once in a di-uranium adduct.
Abstract The electromagnetic interference (EMI) shielding mechanism of carbon nanotube (CNT)/polymer nanocomposites synthesized through a unique processing technique has been studied. As CNT/polymer nanocomposites evolve towards device applications, homogenous dispersion of CNTs has become a main objective to realize…
Airborne nanoparticles (NPs) that enter the respiratory tract are likely to reach the alveolar region. Accumulating observations support a role for zinc oxide (ZnO) NP dissolution in toxicity, but the majority of in-vitro studies were conducted in cells exposed to NPs in growth media, where large doses of dissolved io…
Ultraviolet photodetectors (PDs) have been fabricated from p-ZnO:(Li,N)/n-ZnO structures in this Letter. The PDs can operate without any external power supply and show response only to a very narrow spectrum range. The self-power character of the devices is due to the built-in electric field in the p-n junctions that…
The tosylation of cellulose in the eco-friendly solvent NaOH–urea in the presence of the nonionic surfactant polyethylene glycol alkyl-(C11–C15) ether (Imbentin) yields well soluble p-toluenesulfonic acid esters of cellulose (tosyl cellulose). The influence of reaction time, temperature, and molar ratio on the degree…
Implementation of 3D-architectures in diamond detectors promises to achieve unreached performances in the radiation-harsh environment of future high-energy physics experiments. This work reports on the collection efficiency under β-irradiation of graphitic 3D-electrodes, created by laser pulses in the domains of nanos…
PURPOSE: This study investigates amide proton transfer (APT) and nuclear overhauser enhancement (NOE) in phantoms and 9L tumors in rat brains at 9.4 Tesla, using a recently developed method that can isolate different contributions to exchange. METHODS: Chemical exchange rotation transfer (CERT) was used to quantify AP…
This study proposes a method for manufacturing high-performance electrode materials in which controlling the shape of the current collector and electrode material for a Li-ion capacitor (LIC). In particular, the proposed LIC manufacturing method maintains the high voltage of a cell by using a microdome-patterned elect…
Single-walled carbon nanotubes (SWNTs) are highly desired for future electronic applications due to the excellent electrical, mechanical, and thermal properties. However, the density and the selectivity in the growth of aligned semiconducting nanotubes do not coexist previously: when the selectivity is high, the densi…
The field of computational catalysis has existed in one form or another for at least 30 years. Its ultimate goal - the design of a novel catalyst entirely from the computer. While this goal has not been reached yet, the 21st Century has already seen key advances in capturing the myriad complex phenomena that are criti…