저작근 근전도에 관한 정상교합자와 ii급 부정교합자의 비교 연구

CuO nanostructures: Synthesis, characterization, growth mechanisms, fundamental properties, and applications

Molecular Semiconductors in Organic Photovoltaic Cells

SnO2: A comprehensive review on structures and gas sensors

One-dimensional TiO2 (1D TiO2) nanomaterials with unique structural and functional properties have been extensively used in various fields including photocatalytic degradation of pollutants, photocatalytic CO2 reduction into energy fuels, water splitting, solar cells, supercapacitors and lithium-ion batteries. In the past few decades, 1D TiO2 nanostructured materials with a well-controlled size and morphology have been designed and synthesized. Compared to 0D and 2D nanostructures, more attention has been paid to 1D TiO2 nanostructures due to their high aspect ratio, large specific surface area, and excellent electronic or ionic charge transport properties. In this review, we present the crystal structure of TiO2 and the latest development on the fabrication of 1D TiO2 nanostructured materials. Besides, we will look into some critical engineering strategies that give rise to the excellent properties of 1D TiO2 nanostructures such as improved enlargement of the surface area, light absorption and efficient separation of electrons/holes that benefit their potential applications. Moreover, their corresponding environmental and energy applications are described and discussed. With the fast development of the current economy and technology, more and more effort will be put into endowing TiO2-based materials with advanced functionalities and other promising applications.

A review of one-dimensional TiO2 nanostructured materials for environmental and energy applications

Photocatalytic degradation of toxic organic chemicals is considered to be the most efficient green method for surface water treatment. We have reported the sol-gel synthesis of Gadoped anatase TiO2 nanoparticles and the photocatalytic oxidation of organic dye into nontoxic inorganic products under UV irradiation. Photodegradation experiments show very good photocatalytic activity of Ga-doped TiO2 nanoparticles with almost 90% degradation efficiency within 3 hrs of UV irradiation, which is faster than the undoped samples. Doping levels created within the bandgap of TiO2 act as trapping centers to suppress the photogenerated electron-hole recombination for proper and timely utilization of charge carriers for the generation of strong oxidizing radicals to degrade the organic dye. Photocatalytic degradation is found to follow the pseudo-first-order kinetics with the apparent 1st order rate constant around 1.3 × 10-2 min-1. The cost-effective, sol-gel-derived TiO2 :Ga nanoparticles can be used efficiently for light-assisted oxidation of toxic organic molecules in the surface water for environmental remediation.

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Photocatalytic degradation of organic dye by sol-gel-derived gallium-doped anatase titanium oxide nanoparticles for environmental remediation

Low-threshold field emission from transparent p-type conducting CuAlO2 thin film prepared by dc sputtering

Titania (TiO2) nanotube arrays (TNAs) with different pore diameters (140???20 nm) are fabricated via anodization using hydrofluoric acid (HF) containing ethylene glycol (EG) by changing the HF-to-EG volume ratio and the anodization voltage. To evaluate the effects of different pore diameters of TiO2 nanotubes on bacterial biofilm formation, Shewanella oneidensis (S. oneidensis) MR-1 cells and a crystal-violet biofilm assay are used. The surface roughness and wettability of the TNA surfaces as a function of pore diameter, measured via the contact angle and AFM techniques, are correlated with the controlled biofilm formation. Biofilm formation increases with the decreasing nanotube pore diameter, and a 20 nm TiO2 nanotube shows the maximum biofilm formation. The measurements revealed that 20 nm surfaces have the least hydrophilicity with the highest surface roughness of ?17 nm and that they show almost a 90% increase in the effective surface area relative to the 140 nm TNAs, which stimulate the cells more effectively to produce the pili to attach to the surface for more biofilm formation. The results demonstrate that bacterial cell adhesion (and hence, biofilm formation) can effectively be controlled by tuning the roughness and wettability of TNAs via controlling the pore diameters of TNA surfaces. This biofilm formation as a function of the surface properties of TNAs can be a potential candidate for both medical applications and as electrodes in microbial fuel cells.

https://iopscience.iop.org/article/10.1088/0957-4484/26/6/065102/pdf

Biofilm formation on a TiO2 nanotube with controlled pore diameter and surface wettability

Cell electrofusion in microfluidic devices attracted great attention in recent years due to its widespread applications potential in cell-based studies. In these microfluidic devices, many manipulation methods, such as chemical conjugation, electric field induced dielectrophoresis, and microfluidic controlling based on microstructure, are used to improve the pairing precision of cells, especially heterogeneous cells. High-strength electric field can produce minipores on cell membrane and induce cell fusion. It can be generated by a constricting electric field with microstructures or two microelectrodes. In comparison with the traditional electrofusion or other cell-fusion methods, microfluidic cell-electrofusion method has many advantages such as precise manipulation, high efficiency in cell pairing and fusion, higher cell viability, lower sample contamination and smaller Joule heating effect. In this article, the development of various microfluidic cell-electrofusion methods is reviewed. Some important parameters affecting the cell electrofusion are discussed in detail. Techniques that can be integrated on microfluidic devices for high-efficiency cell electrofusion, such as on-chip cell separation and culture, are also discussed comprehensively.

Cell electrofusion in microfluidic devices: A review

Enhanced thermo-optical performance and high BET surface area of graphene@PVC nanocomposite fibers prepared by simple facile deposition technique: N2 adsorption study

Arghya Narayan Banerjee

Papers

Photocatalytic degradation of organic dye by sol-gel-derived gallium-doped anatase titanium oxide nanoparticles for environmental remediation

Low-threshold field emission from transparent p-type conducting CuAlO2 thin film prepared by dc sputtering

Biofilm formation on a TiO2 nanotube with controlled pore diameter and surface wettability

Cell electrofusion in microfluidic devices: A review

Enhanced thermo-optical performance and high BET surface area of graphene@PVC nanocomposite fibers prepared by simple facile deposition technique: N2 adsorption study