Materials Literature
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In this paper, we report a facile method to synthesize high quality CdS: Eu nanocrystals (NCs) and CdS: Eu/ZnS NCs with strong photoluminescence (PL). The influence of various experimental variables including the concentration of Eu3+ ions, the reaction time and the reaction temperature were investigated systematicall…
Lead-free (K0.5Na0.5)(Nb0.7Ta0.3)O3 piezoelectric material was successfully synthesized via a sol-gel process. Crystalline (K0.5Na0.5)(Nb0.7Ta0.3)O3 nanopowders were obtained after heat treatment at 700 degrees C. The particle size was estimated to be 87nm +/- 23 nm. The transmission electron microscopy images showed…
Nano-sized Cu-Sn and Cu oxide particles supported on ball-milled graphite were synthesized, and their electrochemical characteristics for use as anode active materials in lithium-ion batteries were investigated. The samples were also characterized via FE-SEM, XRD, and TGA. Most of the Cu oxides on BMG were monoclinic…
We demonstrate that the structural transition of ZnS nanoparticles from sphalerite to wurtzite is influenced by high pressures and temperatures. Under the pressure of 1 GPa, the structural transition of ZnS nanoparticles commences at 250 degrees C, much lower than that 400-500 degrees C for ZnS nanoparticles under nor…
We report on the fabrication of silicon nanostructures with a high aspect ratio that were created using a combination of electrochemical etching and alkaline etching. With this technique, we were able to fabricate nano- and/or micro-wire structures that are perfectly periodic over large areas of 3.14 cm2. After porous…
Objective:To prepare the solid dispersions of ibuprofen,in order to improve dissolution properties and mask bitterness of ibuprofen.Methods: Ibuprofen raw materials were mixed with Eudragit EPO in the proportion of 1 to 1.5(w/w) and the solid dispersions were produced by hot-melt extrusion.The dispersed state of ibupr…
Supercooled smectic nanoparticles are under investigation as potential drug carrier systems. Lipid nanoemulsions have the disadvantage of insufficient stabilization whereas solid lipid nanoparticles suffer from disadvantages like low drug incorporation tendencies. Hence there was a need to develop new drug delivery sy…
In amorphous silicon solar cells, degradation is directly related to V(oc), FF and cell performance. The dependence of the stability of thin film amorphous silicon solar cells is studied in terms of the volume fraction of B2H6 in the p-layer. When the volume fraction of B2H6 is increased by an order of magnitude, the…
Technology of elongated magnetically hard nanoparticles is far less developed than that of spherical magnetic nanoparticles. This article reports on new fabrication method and properties of magnetically hard magnetite nanowires in anodized alumina membrane (AAM). First, Fe nanowires with 60 nm diameter and 100 nm inte…
Nanostructured ZnO photoelectrodes were synthesized on fluorine-doped tin oxide (FTO) glass substrates that were spin-coated with a sol-gel based ZnO seed layer via a chemical bath deposition (CBD) method at varying times of 1, 2, 4, and 8 h. Then, TiO2 nanoparticulate electrodes were prepared on ZnO nanorods using th…
In this communication, we report a new method for effective immobilization of Ag nanoparticles (AgNPs) on thiolated singlestranded DNA (thiol-ssDNA) modified Au electrode (AuE) surface via coordination interactions between the nitrogen atoms of DNA bases and AgNPs. It suggests that the AgNP-immobilized AuE exhibits no…
Dependent effects on edge-to-edge distance and incidence polarization in surface-enhanced Raman Scattering (SERS) were studied in detection of 4-mercaptopyridine (4-MPy) molecules absorbed on gold nanotrenches and nanoholes. The gold nanostructures with controllable size and period were fabricated using electron-beam…
Ruthenium manganese and cobalt manganese nano ceramic catalysts were synthesized using a new synthesis procedure at relatively low temperature by thermal decomposition of co-precipitated [Mn(Bipy)2]Cl2 and, [Ru(Bipy)3]Cl2 in an inert ambient of dry argon gas and also by Co precipitation method and studied for the syng…
The dependence of exchange-bias field (HEB) and coercivity (HC) on the ferromagnetic (FM) layer thickness in CoFe/IrMn and CoFe/FeMn bilayers was investigated. The coercivity of the CoFe/IrMn bilayers is very sensitive to the IrMn (110) structure. Through inserting a thin antiferromagnetic (AFM) FeMn layer into the Co…
Low temperature cofired ceramics (LTCC) is established as a widespread platform for advanced functional ceramic circuits in many different applications, such as space, aviation, medical, and sensor technology. MLC (multi layer ceramics) based systems allow the integration of passive components, which leads to a high i…
Liquid state provides a function of matter transport or reaction field and plays an important role in manufacturing processes such as refining, forging or welding. However, experimental procedures are significantly difficult for an observation of solidification process of iron and iron-based alloys in order to identif…
We propose an instrument based on a abstract experiment model that covers very different set-ups but still yields enough formal grip to allow useful services to be implemented in advance. The model demands the user to entirely decompose the experiments into named compounds. In return the services help with the present…
Keggin형 $H_{3+x}PW_{12-x}Nb_xO_{40}$ (x=0, 1, 2, 3) 및 Wells-Dawson형 $H_{6+x}P_2W_{18-x}Nb_xO_{62}$ (x=0, 1, 2, 3) 헤테로폴리산(Heteropolyacid) 촉매를 이용하여 n-Butanol의 에테르화(Etherification) 반응을 통한 Di-n-Butyl Ether의 제조를 수행하였다. 먼저 Niobium이 서로 다른 비율로 치환된 Keggin형 및 Wells-Dawson형 헤테로폴리산 촉매를 제조하였다. FT-IR, ICP-AES 및 $^{31}P$ NMR 분석을 통하여…
Program «Poil» is developed for yarn hairiness research by means of a computer method. The program defines yarn hairiness indicators on five gradation of fiber lengths by processing of the scanned images of a yarn
Background and Aim : The density of Gutta-percha is an important factor in canal seal and root canal treatment success. So, the present study intended to compare the effect of Ni-Ti and S-S spreaders on the intracanal Gutta-percha weight . Materials and Methods : In this experimental study, 40 simulated canals with 40…