Materials Literature
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A graphene-based supercapacitor electrode suitable for ionic liquid electrolytes was designed and prepared based on the electrostatic interactions between negatively charged graphene oxides (GO) and positively charged mesoporous carbon CMK-5 platelets. Thermal annealing of the GO–CMK-5 composite under an inert atmosph…
The phenomenon of π-extension has been widely applied to, and exploited within, the field porphyrin chemistry. The development of reliable synthetic routes to various useful starting materials has facilitated the underlying preparative work. The chemical resemblance between porphyrins and expanded and isomeric porphyr…
Highly active yttrium phosphasalen initiators for the stereocontrolled ring-opening polymerization of rac-lactide are reported. The initiators are coordinated by a new class of ancillary ligand: an iminophosphorane derivative of the popular "salen" ligand, termed "phosphasalen". Changing the phosphasalen structure ena…
Multimodal: Gold nanorods are coated with silica/polymer mutilayers, doped with surface-enhance Raman scattering (SERS) and fluorescence agents as well as photosensitizers. The structural and optical properties are tunable and stable in solutions and in living bodies. A real-time and specific in vivo SERS and fluoresc…
The corrosion protection of mild steel in 1 M H3PO4 solution by apricot juice was studied at different temperatures by weight loss technique. Adsorption, activation and statistical studies were addressed in this work. Adsorption studies showed that inhibitor adsorbed on metal surface according to Langmuir isotherm. Av…
Plasmonic nanostructures have played a significant role in the field of nanotechnology due to their unprecedented ability to concentrate light at the nanometre scale, which renders them precious for various sensing applications. The adsorption of plasmonic nanoparticles and nanostructures onto solid substrates in a co…
Dichroic polarizers and waveplates exploiting anisotropic materials have vast applications in displays and numerous optical components, such as filters, beamsplitters and isolators. Artificial anisotropic media were recently suggested for the realization of negative refraction, cloaking, hyperlenses, and controlling l…
Single-walled carbon nanotubes (SWNTs) possess fascinating electrical properties and offer new entries into a wide range of novel electronic applications that are unattainable with conventional Si-based devices. The field initially focused on the use of individual or parallel arrays of nanotubes as the channel materia…
Direct and selective: Supported gold–palladium nanoparticles are active for the oxidation of methane, giving a high selectivity for the formation of methyl hydroperoxide and methanol, using hydrogen peroxide as the oxidant (see picture). The optimal methanol selectivity is achieved by performing the reaction in the pr…
Au/CeO(2) catalysts are highly active for low-temperature CO oxidation and water-gas shift reaction, but they deactivate rapidly because of sintering of gold nanoparticles, linked to the collapse or restructuring of the gold-ceria interfacial perimeters. To date, a detailed atomic-level insight into the restructuring…
Iron oxide nanoparticles are one of the most versatile and safe nanomaterials used in medicine. Recent progress in nanochemistry enables fine control of the size, crystallinity, uniformity, and surface properties of iron oxide nanoparticles. In this review, the synthesis of chemically designed biocompatible iron oxide…
The development of self-healing materials has received much research attention in the last two decades. This review paper gathers recent publications on the self-healing polymeric materials with thermally reversible Diels–Alder (DA) chemistry. The DA reaction is a [4 + 2] cycloaddition involving a diene and a dienophi…
The development of stimulus-responsive polymeric materials is of great importance, especially for the development of remotely manipulated materials not in direct contact with an actuator. Here we design a photoresponsive supramolecular actuator by integrating host–guest interactions and photoswitching ability in a hyd…
Our research studied the bistable mechanism in electro-thermal switching reverse polymer-stabilized cholesteric texture (ET-RPSCT) light shutters. The bistable mechanism in ET-RPSCT is a result of a polymer distortion effect induced by applying a high-voltage pulse. It was found that long-pitch cholesteric liquid crys…
The experimental results of field-emission characteristics of selectively grown randomly oriented multiwalled carbon nanotubes (CNTs) are presented. The CNTs are synthesized onto plain silicon (n-type 100) substrates having an iron (Fe) catalyst layer using chemical vapor deposition. The field-emission measurement res…
The optical properties of magnetite at room temperature were studied by infrared reflectivity measurements as a function of pressure up to 8 GPa. The optical conductivity spectrum consists of a Drude term, two sharp phonon modes, a far-infrared band at around 600 cm(-1) and a pronounced mid-infrared absorption band. W…
Enhanced electron field emission (EFE) properties in microcrystalline diamond (MCD) films that have been Fe-coated and postannealed are observed. Additionally, improved microplasma characteristics are also observed when these materials are used as cathodes. The turn-on field for inducing the EFE process decreases from…
In this paper we report the design, fabrication and evaluation of a field emitter array of carbon nanotubes (CNTs) on a Si tip with a pn junction. Electron beam emission can be switched on by laser irradiation. The Si tip array is formed on a 5 μm-thick Si membrane. Each emitter consists of CNT emitter tips and a gate…
Abstract 1 H and 13 C NMR chemical shifts of iron porphyrin complexes are determined mainly by the spin densities at the peripheral carbon and nitrogen atoms caused by the interaction between paramagnetic iron 3d and porphyrin molecular orbitals. This review describes how the half‐occupied iron 3d orbitals such as d π…
We investigate the light wave states in the octagonal and decagonal quasiperiodic metallic structures by considering their respective approximants at different orders. The mechanisms underlying the light wave behaviors are studied in relation to various structure parameters and configurations. We show that the formati…