microscopy scanning Articles
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Study on fabrication and photoluminescence of SiC nanorods synthesised by carbothermal reduction
SiC nanorods were synthesised from SiO2 xerogel containing carbon nanoparticles at 1550°C in argon flow. The morphology and structure of the materials were determined by transmission electron microscopy, scanning electron microscopy, X-ray diffraction and Raman scattering methods. The static photoluminescence and time-resolved photoluminescence of SiC nanorods were examined under different ...
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Near field optical microscopy: a brief review
Near Field Optical Microscopy (NSOM) has evolved into a mature member of the family of scanning probe microscopy. In this article, we briefly go over the principle of NSOM, its breakthroughs and setbacks. We will describe some of the most commonly used NSOM modalities and conclude with the recent advances based on optical nanoantennas. We will then highlight the potential of this high–resolution ...
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Novel p–n junction UiO-66/BiOI photocatalysts with efficient visible-light-induced photocatalytic activity
Novel visible-light-induced UiO-66/BiOI photocatalysts with a p–n junction structure have been prepared for the first time through a facile hydrothermal method. The prepared photocatalysts were characterized using the powder X-ray diffraction, high resolution transmission electron microscopy, scanning electron microscopy, UV–visible diffuse reflectance spectra, and N2 adsorption–desorption ...
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Synthesis of ZnO-CuO/MCM-48 photocatalyst for the degradation of organic pollutions
The photocatalytic properties of ZnO-CuO catalysts supported on siliceous MCM-48 (Mobil Composition of Matter No. 48) for the degradation of organic pollutions such as methylene blue and salicylic acid under UV light irradiation were investigated. These catalysts were prepared by impregnation of MCM-48 with a mixed aqueous solution of copper acetate and zinc acetate. X-ray diffraction, ...
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Electrospun substituted polyphenylene vinylene nanofibres
Biosensors are a rapidly growing research field, which is being swiftly advanced due to recent advances in nanotechnology. However most of the sensors developed are solution based, which limits their commercial use. Thus, with the view of developing bio–nanosensors based on solid–state photoluminescent nanofibres the electrospinning process was optimised for a novel PPV–derivative composite ...
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Characterization of cerium oxide nanoparticles—Part 2: Nonsize measurements
Part 1 (see companion paper) of the present study discussed the application of a multimethod approach in characterizing the size of cerium oxide nanoparticles (NPs). However, other properties less routinely investigated, such as shape and morphology, structure, chemical composition, and surface properties, are likely to play an important role in determining the behavior, reactivity, and potential ...
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Supramolecular chemistry at the liquid/solid interface probed by scanning tunnelling microscopy
The liquid/solid interface provides an ideal environment to investigate self-assembly phenomena, and scanning tunnelling microscopy (STM) is one of the preferred methodologies to probe the structure and the properties of physisorbed monolayers on the nanoscale. Physisorbed monolayers are of relevance in areas such as lubrication, patterning of surfaces on the nanoscale, and thin film based ...
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Self–organised growth of molecular arrays at surfaces
The autonomous ordering and assembly of atoms and molecules on atomically well–defined surfaces allow creating a wide range of surface nanostructures, opening an alternative bottom–up route to the traditional top–down fabrication methods of the microelectronics industry now approaching their fundamental limits. This review summarises some recent efforts of our team to grow molecular arrays on ...
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Molecular nanoscience and engineering on surfaces
Molecular engineering of low-dimensional materials exploiting controlled self-assembly and positioning of individual atoms or molecules at surfaces opens up new pathways to control matter at the nanoscale. Our research thus focuses on the study of functional molecules and supramolecular architectures on metal substrates. As principal experimental tools we employ low-temperature scanning ...
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Photocatalytic degradation of methyl orange, methylene blue and rhodamine B with AgCl nanocatalyst synthesised from its bulk material in the ionic liquid [P6 6 6 14]Cl
The photocatalytic degradation of wastewater containing three industrial dyes belonging to different families, methyl orange (MO), methylene blue (MB) and Rhodamine B (RhB), was studied under UV-Vis irradiation using synthesised silver chloride nanoparticles. The nanocatalyst was prepared by a dissolution/reprecipitation method starting from the bulk powder and the ionic liquid ...
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Temperature dependent morphological evolution of Rh nanopyramids
The temperature dependent oxygen–induced nanopyramidal faceting of atomically rough Rh(210) surface has been studied using scanning tunnelling microscopy (STM). Rh(210) surface is annealed in oxygen at temperature ≥550 K, the surface completely covered with nanometre–scale facets. The annealing temperature is found to be one of the responsible factors for the nucleation and growth of faceted ...
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Photocatalytic removal of nitrate using TiO2/polyacrylonitrile nanofiber membrane synthesized by co-electrospinning process
The present study investigates the development of titanium dioxide (TiO2)/polyacrylonitrile (PAN) nanofiber membrane for the removal of nitrate from aqueous solution by photocatalysis. The TiO2 nanoparticles were synthesized by conventional sol–gel method followed by blending them into PAN polymer. The blended solution was electrospun into nanofiber using the co-electrospinning ...
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Effects of DMSO and glycerol additives on the property of polyamide reverse osmosis membrane
The polyamide reverse osmosis (RO) membranes were prepared through interfacial polymerization of m-phenylenediamine (MPD) and trimesoyl chloride (TMC). The use of dimethyl sulfoxide (DMSO) and glycerol as additives for the formation of thin-film composite (TFC) was investigated. We studied the effect of DMSO and glycerol addition on membrane property and RO performance. Microscopic morphology ...
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Study on non-linear equilibrium, kinetics and thermodynamic of deltamethrin removal in aqueous solution using modified magnetic iron oxide nanoparticles
The purpose of modification of magnetic iron oxide nanoparticles is an eco-friendly, emerging and economical method for removing deltamethrin in the aqueous solution and wastewater effluents when compared with other adsorbent methods. Modified magnetic iron oxide nanoparticles were synthesized by co-precipitation and then coupled with 3-hydroxytyraminium chloride. The nano-sorbent was ...
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Direct contact membrane distillation for nuclear desalination. Part I: Review of membranes used in membrane distillation and methods for their characterisation
Membrane distillation (MD) is a relatively novel membrane technology considered by the researchers as a potential method for seawater desalination. In the first issue of this journal, the possibility of nuclear desalination by MD was discussed comparing various MD configurations. The present paper firstly reviews the membranes used in MD and the methods of their characterisation, among them ...
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Multi-component supramolecular assembly structures studied by scanning tunnelling microscopy
In this review, recent progress on the multi-component self-assembled structure and assembling mechanism are discussed. The effects of various interaction types on the assembling structures are summarised to gain better understanding and controlling on the functional molecular assemblies. We are focused on the hydrogen-bonded supramolecular structures, template effects of assemblies and the ...
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Preparation and characterisation of silver doped ZnO nanostructures
ZnO was prepared by hydrothermal method. The result of scanning electron microscopy showed that the materials had nanorod structures. Ag–doped ZnO was prepared by UV–photoreduction respectively. Crystalline phases and optical absorption of the prepared samples were determined by X–ray diffraction, Raman spectrum and UV–visible spectrophotometer. X–ray analyses reveals that Ag doped ZnO ...
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Scanning probe recognition microscopy investigation of neural cell prosthetic properties
Scanning probe recognition microscopy (SPRM) with auto-tracking of individual nanofibres is used for investigation of the key nanoscale properties of polyamide a nanofibrillar matrix that promotes more in vivo-like forms and functions for cultured cells. Both unmodified and fibroblast growth factor-2-modified nanofibres are considered. The contributions of nanofibrillar matrix elasticity and ...
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Stability and deactivation research of RuO2-PdO/Ti electrode in dye water degradation
RuO2-PdO/Ti electrode was prepared and used for the electro-catalytic degradation of Active Red K-2BP. It was found that the electrode was very stable in the process. A discoloration rate of 96.2% could still be achieved on the electrode after being used for 100 runs. X-ray photoelectron spectroscopy, X-ray diffraction, and scanning electron microscopy characterizations of the electrode ...
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Comparative in situ PET biodegradation assay using indigenously developed consortia
A soil burial test was carried out to evaluate the biodegradation of polyethylene terephthalate under natural environment for a period of six months in presence of three different indigenously developed bacterial consortia. These consortia comprised of potential polymer-degrading bacterial cultures isolated from various waste disposal sites. The comparative biodegradation of PET samples in ...
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