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vapors, etc ; distillation; electricity; energy; energy conservation; heat; heat pumps; Show all 7 Subjects
Abstract:
... Trichlorobenzene is a mixture of three isomers which are 1,2,3-trichlorobenzene, 1,2,4-trichlorobenzene and 1,3,5-trichlorobenzene. Due to the boiling points of the three components are close to each other, the adoption of conventional distillation process requires a large amount of energy. To reduce the distillation energy consumption, heat integration technology and mechanical vapor recompressio ...
vapors, etc ; biomass; carbon; combustion; environment; nitrates; oxygen; oxygen isotopes; photochemistry; pollution; China; Show all 11 Subjects
Abstract:
... Atmospheric nitrate (NO₃⁻) produced by photochemical oxidation in the atmosphere has high oxygen isotope ratios (δ¹⁸O values). Recently, the primary NO₃⁻ emitted from combustion sources was found to have much lower δ¹⁸O values. However, it is unclear how and to what extents the low δ¹⁸O signatures were controlled by major O sources during the primary NO₃⁻ formation of combustion processes. Here, w ...
vapors, etc ; Poisson distribution; carbon; compression strength; deformation; formaldehyde; modulus of elasticity; nanomaterials; temperature; thermal expansion; thermal stress; Show all 11 Subjects
Abstract:
... Chemiresistive SiOC Negative Poisson's ratio structures for gas detection under thermal and pressure loading were constructed by vat photopolymerization and surface sensitization. Metal-organic framework-derived SnO₂ nanocubes modification provided the structures with sensing capability, while the high deformation-resistant SiOC substrates protected the integrity and connectivity of the sensing la ...
John S. Bulmer; Arthur W.N. Sloan; Michael Glerum; Jennifer Carpena-Núñez; Robert Waelder; Jefford Humes; Adam M. Boies; Matteo Pasquali; Rahul Rao; Benji Maruyama
... Carbon nanotube (CNT) diameter control is essential for many conductive and structural applications; to date, a general diameter methodology applicable to all floating catalyst chemical vapor deposition (FC-CVD) reactors is not yet established. Single-walled CNT (SWCNT) diameter was robustly controlled by systematically exploring an extensive variety of fundamental FC-CVD reactor parameters (631 e ...
vapors, etc ; carbon; carbon dioxide; carbon nanotubes; density functional theory; desorption; electrodes; electrolytes; electrosynthesis; encapsulation; energy; ethanol; hydrogen; liquids; nanoparticles; nickel; Show all 16 Subjects
Abstract:
... The electrosynthesis of ethanol by CO₂ reduction is mostly achieved on metallic copper electrocatalysts, but confronts low Faradic efficiency (FE) and selectivity. Herein, we report novel electrocatalysts in which Ni nanoparticles are encapsulated in N-rich carbon nanotubes (Ni@NCNT) by chemical vapor deposition method. The optimized Ni@NCNT-700 exhibits a high ethanol FE of 38.5% at −0.5 V and re ...
vapors, etc ; aerogels; carbon; carbon nanotubes; energy conversion; heat transfer; molecular dynamics; paraffin wax; phase transition; polymerization; pyrroles; thermal conductivity; thermal energy; vibration; Show all 14 Subjects
Abstract:
... Phase change materials (PCMs) have been widely investigated as promising thermal management materials due to their high thermal storage capacity, satisfactory heat transfer rate and multi-responsive energy conversion and storage characteristics. In this work, a shape-stabilized solar-/electro- responsive thermal energy capture and storage system is proposed involving polypyrrole (PPy)-deposited ca ...
vapors, etc ; air; ceramics; chemical species; chlorobenzene; environment; naphthalene; octanol; polychlorinated biphenyls; polychlorinated dibenzodioxins; polychlorinated dibenzofurans; sodium silicate; t-test; vapor pressure; volatile organic compounds; Italy; Show all 16 Subjects
Abstract:
... Extractable denuders were designed to collect trace atmospheric semivolatile organic compounds with high volume (38.30 and 200 L/ min) samplers. Denuders were made of multichannel ceramic support coated with sodium silicate and functionalised with phenyl moieties. Polycyclic aromatic hydrocarbons, polychlorinated biphenyls, polychlorinated dibenzodioxins and polychlorinated dibenzofurans and chlor ...
Jakub Piastek; Jindřich Mach; Stanislav Bardy; Zoltán Édes; Miroslav Bartošík; Jaroslav Maniš; Vojtěch Čalkovský; Martin Konečný; Jiří Spousta; Tomáš Šikola
... Surface-enhanced Raman spectroscopy (SERS) is a perspective nondestructive analytic technique enabling the detection of individual nanoobjects, even single molecules. In this paper, we have studied the morphology of Ga islands deposited on chemical vapor deposition graphene by ultrahigh vacuum evaporation and local optical response of this system by the correlative Raman imaging and scanning elect ...
... Low-cost multicomponent alloyed one-dimensional (1D) semiconductors exhibit broadband absorption from the ultraviolet to the near-infrared regime, which has attracted a great deal of interest in high-performance flexible optoelectronic devices. Here, we report the facile one-step fabrication of high-performance broadband rigid and flexible photodevices based on multicomponent alloyed 1D cadmium–su ...
... Regulating atomically precise sites in catalysts to achieve site-selective reactions is remarkable but challenging. In this work, a convenient and facile solid–gas/liquid reaction strategy was used to construct controllable active sites in metal–organic frameworks (MOFs) to guide an orientation site-selective reaction. A flexible Cuᴵ-MOF-1 with dynamics originating from an anionic and tailorable f ...
... The strong and varied chemical interactions between polymer semiconductors and small molecules, and the electronic consequences of these interactions, make polymer organic field-effect transistors (OFETs) attractive as vapor sensing elements. Two hindrances to their wider acceptance and use are their environmental drift and the poor specificity of individual OFETs. Approaches to addressing these t ...
... The high-quality semipolar (112̅2) AlGaN epitaxial films have been obtained on m-plane sapphire by metal–organic chemical vapor deposition. X-ray rocking curve measurements show the full-width at half-maximums of semipolar (112̅2)-oriented AlGaN films are 0.357° and 0.531° along [112̅3̅]AₗGₐN and [11̅00]AₗGₐN, respectively. The fabricated semipolar AlGaN metal–semiconductor–metal solar-blind ultra ...
... We present a thermodynamic argument showing that the evaporation and condensation free-energy barriers of water confined between two hydrophobic self-assembled monolayers (SAMs) vary more gradually with the SAM hydrophobicity as compared to the case of water confined between two bare hydrophobic surfaces (no SAMs). We validate our theory by calculating the free-energy profiles of water confined be ...
... The independent expertise required by the preparation and application of graphene has brought a challenge to the more fluent development of graphene devices. We combine the advantages of chemical vapor deposition and micromechanical exfoliation methods of synthesizing graphene to develop a “graphene tape” for the fast utilization of graphene, which is robust, storable, and user-friendly. Prepared ...
... Reversible vapochromism in the NIR region is achieved for a mixed-valence platinum complex with lipid counterions, from which exclusion of crystallization water by organic vapor alters the lipid molecular orientation, which amplifies the information to changes in the 1D coordination structure and the electronic state. ...
Yannick Beckmann; Annika Grundmann; Leon Daniel; Mohamed Abdelbaky; Clifford McAleese; Xiaochen Wang; Ben Conran; Sergej Pasko; Simonas Krotkus; Michael Heuken; Holger Kalisch; Andrei Vescan; Wolfgang Mertin; Tilmar Kümmell; Gerd Bacher
... A promising strategy toward ultrathin, sensitive photodetectors is the combination of a photoactive semiconducting transition-metal dichalcogenide (TMDC) monolayer like MoS₂ with highly conductive graphene. Such devices often exhibit a complex and contradictory photoresponse as incident light can trigger both photoconductivity and photoinduced desorption of molecules from the surface. Here, we use ...
vapors, etc ; energy; photoluminescence; semiconductors; Show all 4 Subjects
Abstract:
... The quality of as-synthesized monolayers plays a significant role in atomically thin semiconducting transition metal dichalcogenides (TMDCs) to determine the electronic and optical properties. For designing optoelectronic devices, exploring the effect of processing parameters on optical properties is a prerequisite. In this view, we present the influence of processing parameters on the lattice and ...
... Solvent-free synthesis is one kind of important approach for the preparation of porous materials. However, the catalytic vapor generated during these processes is limitedly reported. Herein, a novel catalytic vapor-assisted solvent-free method was established for the preparation of porous organic polymers (POPs) by application of catalytic vapor derived from ferric chloride. After investigating th ...
... Bilayer graphene (BLG) has aroused enormous research interest because of its unique tunable physical properties, which are dependent on the twisted angles and interlayer interaction. Therefore, controlling electronic properties of BLG is very crucial to developing its potential applications in many fields. In this article, BLG single crystals with two representative twisted angles, ∼0° and ∼30° gr ...
... In this work, the condensation characteristics of droplets considering the non-condensable gas with different interaction effects are numerically studied utilizing a multicomponent multiphase thermal lattice Boltzmann (LB) model, with a special focus on the asymmetric nature induced by the interaction effect. The results demonstrate that for isolated-like growth with negligible interactions, the c ...