排序方式: 共有9条查询结果,搜索用时 0 毫秒
1
1.
The possibility to synthesize M1x M2(OH) y F z nanolayers by the ionic layering method with the use of soluble anionic complexes of metal fluorides was demonstrated. The influence of the concentration and pH of reagent solutions and of the number of ionic layering cycles on the kinetics of layer growth was studied using the example of Cu x Zr(OH) y F z layers. The composition of the synthesized layers was studied by X-ray photoelectron (XPE) spectroscopy, ellipsometry, and electronic and Fourier transform IR (FT-IR) transmission spectroscopy. 相似文献
2.
Altangerel Amarjargal Leonard D. Tijing Hem Raj Pant Chan-Hee Park Cheol Sang Kim 《Current Applied Physics》2012,12(4):1106-1112
In this study, we report a simple and cost-effective method for in situ decoration of Ag NPs onto nanoporous TiO2 microrods by one medium (ethylene glycol) that can produce two different morphologies. In order to investigate the morphology, phase composition, crystalline structure, and chemical state (valency) of samples before and after annealing in air at different temperatures, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were performed. The present results show that the size, morphology and crystallinity of both Ag NPs and TiO2 microrod substrate depend on the post-annealing treatment temperatures. The annealed Ag–TiO2 NP/microrod composites show large inhibition zones against E. coli bacteria. The obtained Ag–TiO2 composites have the potential for use as a novel antibacterial material and in water treatment applications. 相似文献
3.
This paper aims to consider an application of conjugate duality in convex optimization to the generalized Nash equilibrium problems with shared constraints and nonsmooth cost functions. Sufficient optimality conditions for the problems regarding to players are rewritten as inclusion problems and the maximal monotonicity of set-valued mappings generated by the subdifferentials of functions from data of GNEP is proved. Moreover, some assertions dealing with solutions to GNEP are obtained and applications of splitting algorithms to the oligopolistic market equilibrium models are presented. 相似文献
4.
Altangerel Amarjargal Leonard D. Tijing Chan-Hee Park Ik-Tae Im Cheol Sang Kim 《European Polymer Journal》2013
A facile method of fabricating novel heat-generating membranes composed of electrospun polyurethane (PU) nanofibers decorated with superparamagnetic iron oxide nanoparticles (NPs) is reported. Electrospinning was used to produce polymeric nanofibrous matrix, whereas polyol immersion technique allowed in situ assembly of well-dispersed Fe3O4 NPs on the nanofibrous membranes without any surfactant, and without sensitizing and stabilizing reagent. The assembly phenomena can be explained by the hydrogen-bonding interactions between the amide groups in the PU matrix and the hydroxyl groups capped on the surface of the Fe3O4 NPs. The prepared nanocomposite fibers showed acceptable magnetization value of 33.12 emu/g, after measuring the magnetic hysteresis loops using SQUID. Moreover, the inductive heating property of electrospun magnetic nanofibrous membranes under an alternating current (AC) magnetic field was investigated. We observed a progressive increase in the heating rate with the increase in the amount of magnetic Fe3O4 NPs in/on the membranes. The present electrospun magnetic nanofibrous membrane may be a potential candidate as a novel heat-generating substrate for localized hyperthermia cancer therapy. 相似文献
5.
Leonard D. Tijing Michael Tom G. Ruelo Chan-Hee Park Altangerel Amarjargal Han Joo Kim Hem Raj Pant Dong-Hwan Lee Cheol Sang Kim 《Chemical Papers》2013,67(10):1304-1310
Laboratory corrosion immersion tests were carried out to investigate the effectiveness of a physical water treatment (PWT) using zinc and ceramic tourmaline-based catalytic materials for the control of carbon steel corrosion in acidic still water (i.e., pH 4.5–5). The tests were carried out at different water temperatures over 168 h. Our results showed a maximum of 22 % reduction in the corrosion rate using PWT in comparison with the control case. Furthermore, the corrosion products depicted more agglomerated particles after the PWT treatment. In both cases, differences were observed in the crystal structures, showing in general lower corrosion activity when PWT was used. The present results could find potential applications in water distribution systems and where metallic materials are exposed to stagnant acidic water. 相似文献
6.
Leonard D. Tijing Woorim Choi Zhe Jiang Altangerel Amarjargal Chan-Hee Park Hem Raj Pant Ik-Tae Im Cheol Sang Kim 《Current Applied Physics》2013,13(7):1247-1255
Composite nanofibrous mat composed of neat polyurethane (PU) and multiwalled carbon nanotubes/polyurethane (MWNT/PU) nanofibers have been fabricated by one-step angled two-nozzle electrospinning. The morphological, thermal, and mechanical properties of the electrospun nanofibers were evaluated. The diameters of electrospun neat PU and composite nanofibers ranged from 239 to 1058 nm. The two-nozzle electrospun (MWNT/PU)/PU composite nanofibers showed curly, and randomly-oriented fibers with interfiber bonding, and were generally bigger in size than single-nozzle electrospun nanofibers. The tensile strength of the neat PU composite nanofiber mat obtained from two-nozzle electrospinning was 25% higher than that obtained from neat PU single-nozzle electrospinning. The incorporation of MWNTs in the composite nanofiber increased the tensile strength by as much as 64% without reducing elongation, made the composite nanofiber more thermally stable, and improved the melting zone. The present results showed that side-by-side angled two-nozzle electrospinning can improve the quality of the electrospun nanofibers that could have potential application in different fields such as filtration, protective clothing and tissue engineering. 相似文献
7.
Leonard D. Tijing Altangerel Amarjargal Zhe Jiang Michael Tom G. Ruelo Chan-Hee Park Hem Raj Pant Dong-Won Kim Dong Hwan Lee Cheol Sang Kim 《Current Applied Physics》2013,13(1):205-210
In this study, tourmaline (TM) nanoparticles (NPs) were incorporated in a polyurethane (PU) matrix by electrospinning and silver (Ag) nanoparticles in the form of wire-like structure were further decorated on the TM/PU nanofibrous mat by photoreduction under ultraviolet light irradiation. The incorporation of TM NPs has increased the conductivity of the solution, thus forming thinner fiber diameters compared to neat PU, but with improved tensile strength. Wire-like, agglomerated Ag NPs were decorated on the TM/PU matrix, and exhibited high bactericidal activity depending on the Ag content. The present antibacterial Ag/TM/PU hybrid mat has potential application in water treatment. 相似文献
8.
Chan-Hee Park Leonard D. Tijing Hem Raj Pant Tae-Hyung Kim Altangerel Amarjargal Han Joo Kim Cheol Sang Kim 《Applied Physics A: Materials Science & Processing》2013,112(4):919-926
In this paper, we report an evaluation of the performance of a new stent durability tester based on the electrical potential sensing method through accelerated in vitro testing of six different nonvascular Nitinol stents simulating physiological conditions. The stents were subjected to a pulsatile loading of 33 Hz for a total of 62,726,400 cycles, at constant temperature and pressure of 35±0.5 °C and 120±4 mmHg, respectively. The electrical potential of each stent was measured in real-time and monitored for any changes in readings. After conducting test-to-fracture tests, the stents were visually checked, and by scanning electron microscopy. A sudden electrical potential drop in the readings suggests a fracture has occurred, and the only two instances of fracture in our present results were correctly determined by our present device, with the fractures confirmed visually after the test. The excellent performance of our new method shows good potential for a highly reliable and applicable in vitro durability testing for different kinds and sizes of metallic stents. 相似文献
9.
Lkhamsuren Altangerel Gert Wanka 《Journal of Mathematical Analysis and Applications》2007,329(2):1010-1035
The aim of this paper is to extend the so-called perturbation approach in order to deal with conjugate duality for constrained vector optimization problems. To this end we use two conjugacy notions introduced in the past in the literature in the framework of set-valued optimization. As a particular case we consider a vector variational inequality which we rewrite in the form of a vector optimization problem. The conjugate vector duals introduced in the first part allow us to introduce new gap functions for the vector variational inequality. The properties in the definition of the gap functions are verified by using the weak and strong duality theorems. 相似文献
1