Materials Literature
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Three kinds of bis(aromatic fluoride) compounds, 3,5-bis(4-fluorobenzoyl)biphenyl (1), 3,5-bis(4-fluorobenzoyl)-1,1′:4′,1″-terphenyl (2), and 3,5-bis(4-fluorobenzoyl)-1,1′:4′,1″:4″,1′′′-quaterphenyl (3), were synthesized by cross-coupling of the corresponding triflates with phenylboronic acid. Linear poly(ether ketone…
A novel series of supramolecular hydrogen bonded ferroelectric liquid crystal (HBFLC) is formed through hydrogen bonding interaction between nonmesogenic dextro-levo tartaric acid (DLTA) and mesogenic p-n-alkyloxy benzoic acids (nBAO, where n = 7 to 12). The formation of hydrogen bond in the complex is confirmed throu…
Modeling the unsteady contact of thin spherical shell with the rigid obstacle was carried out. Problem was solved on base of numerical-analytical method with usage of integral representation for the shell points' normal displacements through the influence functions.
Previous attempts to characterize the γ-brass crystal structure of Ni–Zn (15.4–24% Ni) have failed to identify the location of the Ni and Zn atoms in the crystal lattice for more than 15.4% Ni content (Ni 8 Zn 44 ) due to the similar X-ray diffraction cross sections of Ni and Zn. Ni 8 Zn 44 is known to have a typical…
The close approach of the Fermi energy EF of a Dirac semimetal to the Dirac point ED uncovers new physics such as velocity renormalization,1,2,3 and the Dirac plasma 4,5 at |EF -ED| < kBT, where kBT is the thermal energy. In graphene, substrate disorder drives fluctuations in EF. Three-dimensional topological Dirac se…
Physical grafting of 1-nitropyrene (Pyr-NO <sub>2</sub> ) onto carbon onion <italic>via in situ</italic> reduction of the NO <sub>2</sub> group and pyrene polymerization for supercapacitor positive electrode.
The great majority of electronic and optoelectronic devices depends on interfaces between n-type and p-type semiconductors. Finding such matching donor-acceptor systems in molecular crystals remains a challenging endeavor. Structurally compatible molecules may not necessarily be suitable with respect to their optical…
Inserting molecular monolayers within metal / semiconductor interfaces provides one of the most powerful expressions of how minute chemical modifications can affect electronic devices. This topic also has direct importance for technology as it can help improve the efficiency of a variety of electronic devices such as…
Instability of a binary eutectic solidification front to morphological perturbations due to rejection of a ternary impurity leads to the formation of eutectic colonies. Whereas, the instability dynamics and the resultant mi- crostructural features are reasonably well understood for isotropic systems, several experimen…
A straight-forward extension of the Jackson-Hunt theory for directionally solidifying multi-phase growth where the number of components exceeds the number of solid phases becomes difficult on account of the absence of the required number of equations to determine the boundary layer compositions ahead of the interface.…
In the past decade, stimuli-responsive drug delivery vehicles based on surface-functionalized mesoporous silica nanoparticles (MSNs) have attracted intense interest as a new type of drug carrier. These intelligent drug delivery systems have been demonstrated to enable precise drug release into highly specified targets…
Herein, we demonstrate strong synergistic Co <sub>3</sub> O <sub>4</sub> @CeO <sub>2</sub> hybrid microspheres as peroxidase mimicking artificial enzymes for the sensitive and selective detection of glucose.
Plasma nitriding treatment was applied at 603 K to introduce interstitial nitrogen into carbon steel and to form a precipitation free nitrogen solid solution layer. The nitrogen solid solution layer contained 0.05–0.1 mass% (0.2–0.4 at%) interstitial nitrogen and resulted in ca. 0.7% expansion of the lattice parameter…
Отримано напiвпровiдниковi наночастинки CdS з використанням бактерiї Escherichia coli. Показано, що максимум їх люмiнесценцiї знаходиться на довжинi хвилi 443 нм, що є типовим для наночастинок сульфiду кадмiю, синтезованих з використанням мiкроорганiзмiв. За допомогою спектрального аналiзу вперше дослiджено стабiльнiс…
대기 중 이산화탄소의 재활용 기술과 재생에너지에 의한 물 분해 기술의 접목이 최근 가능해지면서 메탄올은 많은 관심을 받고 있다. 경제성이 유리하도록 메탄올 경제를 실현하기 위해서는 고활성 메탄올 합성 촉매를 제조하여야 하며, 이를 위해서는 논리적인 접근법이 필요하다. 공침법을 통해 제조하는 Cu/ZnO 기반의 촉매는 침전, 숙성, 여과, 세척, 건조, 소성, 환원 등의 복잡한 단계로 제조되며, 100년의 역사를 가지고 있음에도 불구하고 최근에야 침전 화학과 촉매 나노구조에 대한 기초적인 이해가 이루어지고 있다. 이에 본 고에서는 단계별로 합성 변수가 침전, 소성,…
ABSTRACT The influence of water content on liquid crystalline (LC) gel formation and the rheological behavior of a ternary microcrystalline cellulose (MCC)/1‐ehtyl‐3‐methylimidazolium acetate (EmimAc)/water system was investigated using polarized optical microscopy (POM) and rheometry. POM indicated that the distinct…
Abstract In this work, PA-6 nanocomposites containing different amounts of nanoclay (NC) were prepared using a corotating twin-screw extruder. In practice, it is hard task to identify the relationship between the extrusion process parameters and the tensile modulus of PA-6 nanocomposites by performing several experime…
Abstract BACKGROUND Application of perfluorocarbon based liquid/liquid two‐phase systems for cell culture expansion has been investigated at small scale for more than 30 years and it has been established that such systems are able to support the survival of a variety of cell lines. Application of drops in liquid/liqui…
The aim of this study was to understand the effects of pH (5, 6, 7, 8, 9) and activated carbon (AC) concentration (0.01, 0.1, 1, 10, 100 g/L) on the removal of a colloidal solution of nanoparticles (NPs) (ZnO + CuO) using AC in batch kinetic studies. Results revealed that adsorption capacities of AC for Zn and Cu (ind…
Cationic substitution of zirconium in ceria (CeO 2 ) greatly improves its oxygen storage capacity (OSC) and thermal stability. Although the fluorite structure of Ce 0.5 Zr 0.5 O 2 (Ce 2 Zr 2 O 8 ) exhibits good oxygen storage and release properties, its reduced counterpart Ce 2 Zr 2 O 7 in the pyrochlore structure der…