magnetic particles synthesis and characterization

... 3:76–81 magnetic nature would be a proper candidate for biological applications Metal-encapsulated carbon nanobeads, a new kind of carbon nanotubes having both defects (by its structure) and magnetic ... and other biological applications Many research groups have concentrated on the synthesis of SWNT, MWNT and metal-filled MWNT, addressing various key issues such as scale up, reproducibility and ... (MWNTs) and magnetic metal-filled MWNTs by fixed bed thermal chemical vapour deposition technique [21, 22] In this paper we present a novel, cost-effective, easy and singlestep process for the synthesis...

Ngày tải lên: 21/06/2014, 22:20

... binding and selective alkylation leading to a depletion of mtDNA in intact cells (Fig 1) Here we report the synthesis and characterization of a novel mitochondria-targeted alkylating reagent and ... liver mitochondria (40 mg protein) and incubated with 500 lM mitoDC-81 for h and then cut with ClaI (C and D) DNA was separated by electrophoresis on an agarose gel and the ethidium bromide fluorescence ... bromide gel and the fluorescence recorded (A and C) The DNA was then transferred to a nylon membrane and TPP moieties covalently attached to the DNA were visualized using anti-TPP serum (B and D) The...

Ngày tải lên: 20/02/2014, 11:20

... parameters and transport characteristics of Bip-[3H]Pro Results and Discussion Synthesis, chemical characterization and stability of Bip-Pro Figure shows the structure (Fig 1A) and the synthesis ... Ala-4-nitroanilide and Lys(4-nitrobenzyloxycarbonyl)-Val were synthesized according to peptide synthesis standard procedures [18,29] All other chemicals were of analytical grade Synthesis of Bip-Pro and Bip-[3H]Pro ... existence of two conformations Fig Structure and synthesis of Bip-Pro (A) Bip-Pro structure (B) Bip-Pro synthesis: mixed anhydride (MA) method (C) Synthesis of Bip-[3H]Pro EDC, N-ethyl-N¢-(3-dimethyl...

Ngày tải lên: 07/03/2014, 05:20

... Hydrogen (H2) gas was introduced and then hydrogen radicals generated by 2.45 GHz microwave were irradiated on the sample surface to fabricate metal nanoparticles For synthesis of SiNWs, silane gas ... experimental chamber and it was reacted with hydrogen radicals SiNWs were synthesized for 20 at 400 °C Detailed other synthesis conditions are summarized in Table The optical and morphological characteristics ... diameters of SiNWs on the bottom and top were approximately 60 nm and thinner than 10 nm, respectively Their lengths extended up to ~ 1.5 μm Moreover, the SiNWs were tapered and catalysts remained on...

Ngày tải lên: 16/03/2014, 15:12

... deposition Microstructural characterization Scanning and transmission electron microscopy (SEM and TEM) have been carried out in order to determine the degree of homogeneity and crystalline arrangement ... of the nanowire lateral sides and apex Electron diffraction (ED) and analysis of zero-order and higher-order Laue-zones allows precise determination of unit cell and space group Incoherent imaging ... exceeds several microns and the width is smaller than 100 nm As shown in Fig 2a, the length and width of the nanowire measure 25.3 ␮m and about 50 nm, respectively The length and flexibility allows...

Ngày tải lên: 16/03/2014, 15:25

... both hydrophobic forces and hydrogen bonding between Tyr35 (dyad) and the aromatic cluster consisting of Trp344, Trp345* and Tyr355* (Fig 7B, legend), and between Ile28 and Val361 The Lys26 (dyad) ... and the filtrate was precipitated and washed twice with cold diethyl ether After centrifugation at 2800 g for 12 min, the supernatant was discarded and the crude peptide was dissolved in H2O and ... apamin and was shown to be less than 8% of the total binding Electrophysiology Oocyte preparation Xenopus laevis oocytes (stages V and VI) were recovered and prepared for cRNA injection and electrophysiological...

Ngày tải lên: 17/03/2014, 10:20

... reaction of bulky rutile powders and 10 M NaOH solution without using any templates and catalysts The inner and outer diameters of the nanotubes were approximately and nm, respectively The amount ... for 96 (c) and 144 h (d), the peaks at 250 and 620 cm−1 had almost disappeared and new peaks were observed near 290 and 660–760 cm−1 The peaks at 290 and 660–760 cm−1 might be suggested to be ... (c) and 144 h (d–f) J Yu, H Yu / Materials Chemistry and Physics 100 (2006) 507–512 accelerating voltage and the applied current were 40 and 40 mA, respectively X-ray photoelectron spectroscopy...

Ngày tải lên: 19/03/2014, 16:48

... filtered, washed with distilled water and absolute ethanol, and finally dried in vacuum at 50 ◦ C for h 2.2 Characterization The rodlike ␣-FeOOH (goethite) and porous fusiform ␣-Fe2 O3 (hematite) ... and O, and no contamination elements are detected The atomic ratio of Fe and O matched their stoichiometries quite well Associating all those results, the whole reaction to form the ␣-FeOOH and ... 24 h and indicate the large quantity and good uniformity ␣-Fe2 O3 nanocrystallines were achieved using this approach These fusiform ␣-Fe2 O3 nanocrystallines have a mean diameter of 60 nm and...

Ngày tải lên: 19/03/2014, 16:48

... aggregate particles is facilitated and followed by the growth of 1D nanorods to form the urchin-like structure TEM and HR-TEM micrographs of h-WO3 nanostructures formed using Na+ ion- and NH4 + ... ammonium tungstate and a NH4 + ion-based EDTA salt solution and (NH4 )2 SO4 yielded irregular particles In addition, reactions were carried using sodium tungstate, Na+ -based EDTA, and (NH4 )2 SO4 ... , 754 cm−1 , and 810 cm−1 can be observed According to the lit- erature [23,24], these bands can be assigned to the fundamental modes of crystalline h-WO3 The bands at 754 cm−1 and 810 cm−1...

Ngày tải lên: 19/03/2014, 16:48

... Hydrothermal synthesis of ultra®ne Fe2O3 and Fe3O4 powders, Mat Res Bull 33 (1998) 841 [7] D Barb, L Diamandescu, D Mihaila-Tarabasanu, A Rusi, Romanian Patent Osim 86 979, 18 December 1984 [8] L Diamandescu, ... from FeCl3 solution and gaseous NH3 pH $12 160 C 1h with stirring Acicular 0.20 20±25 4.61 Starting material for magnetic recording media B Fe(OH)3 obtained from Fe2(SO4)3 and NaOH solutions ... ratio 3:2x:x2 where x varies between 0.99 and 1.15 A sensible increase (up to 527 kOe) from the standard value of 517 kOe was found for the hyper®ne magnetic ®eld (Hhf ) for all powder oxides...

Ngày tải lên: 19/03/2014, 16:48

... substrate is clean and nothing is observed on its surface, and TiO2 nanorods grow radially on the unmodified substrate and form many papillae in a random pattern, as illustrated in Fig 1b and c The FE-SEM ... composed of fine particles Top view SEM images (Fig 2b and c) show that TNAs grow more vertically on the substrate and have a better orientation after the substrate is coated with TiO2 nanoparticles ... 8C and at a hydrothermal growth temperature of 160 8C and growth time of h (a) PT-substrate; (b) top view of TNAs; (c) side view of TNAs the nanorods have a diameter between 15 and 25 nm and...

Ngày tải lên: 19/03/2014, 16:48

... Advanced chemical methods for soil and clay mineral research Dordrecht: Reidel; 1980 [40] Jeevananda T, Siddaramaiah S, Seetharamu S, Saravanan S, D’Souza L Synthesis and characterization of poly (aniline-co-acrylonitrile) ... AgNO3 and pyrrole in the presence of poly(vinylpyrrolidone) J Phys Chem B 2005;109:18283–8 [37] Sahoo NG, Jung YC, So HH, Cho JW Polypyrrole coated carbon nanotubes: synthesis, characterization, and ... the peak at 1040 cmÀ1 is attributed to C–H deformation and N–H stretching vibrations, and the broad band at 1300 cmÀ1 demonstrates the C–H and C–N in-plane deformation vibration, respectively UV–Vis...

Ngày tải lên: 20/03/2014, 13:08

... graphite tape and sputter coated with gold before analysis Magnetic measurements were carried out at room temperature using a vibrating sample magnetometer (VSM) with a maximum magnetic field ... of 10 kOe Results and discussions The structures of the PPy/Zn0.5Cu0.5Fe2O4 nanocomposite were investigated by FTIR spectroscopy and X-ray diffraction FTIR spectra of the PPy and PPy/Zn0.5Cu0.5Fe2O4 ... deformation vibration at 1302 and 1053 cm− 1, C–N stretching vibration at 1190 cm− 1, Fig XRD patterns of PPy/Zn0.5Cu0.5Fe2O4 nanocomposite (a) and the reference standard data for Zn0.5Cu0.5Fe2O4...

Ngày tải lên: 20/03/2014, 13:08

... Alonso-Nuñez G Synthesis and Structural Characterization of Mo–Ni–W oxides nanostructures J Nanosci Nanotechnol 2008;8(6):2983–9 [23] Solarska R, Alexander BD, Augustynski J Electrochromic and structural ... of the material for the peaks O1 s and W4f are shown in Fig 6a and b respectively Peaks position for O1 s is 530.3 eV and binding energy peak located at 35.4 and 40.6 eV is attributed to W4 f ... large scale synthesis of WS2 nanotubes from WO3 nanorods prepared by a hydrothermal route Solid State Sci 2005;7:67–72 [19] Ha J-H, Muralidharan P, Kyung Kim Do Hydrothermal synthesis and characterization...

Ngày tải lên: 20/03/2014, 13:08

... Bonville P, Antonietti M, Nie- and nanobelts -synthesis, and properties J Phys Chem B, 2006, derberger M Magnetite nanocrystals: Nonaqueous synthesis, characterization, and solubility Chem Mater, ... vapor and iron, and the growth process was depicted in Figure Fe2O3·nH2O grains were gained in the air under high temperature (Figure 9(a) and (b)) Fe2O3·nH2O grain began to decompose and became ... Wang Y, Zhang S Y, Qian Y T patible and biodegradable polymer nanofibers displaying superpara8 Magnetic Fe3O4 nanodisc synthesis on a large scale via a surfac- magnetic properties Chem Phys Chem,...

Ngày tải lên: 20/03/2014, 13:11

... of the valence and conduction bands between the core and shell (Figure 19).14 Figure 19: Band (valence and conduction bands) alignment of different core-shell systems The first and most common ... between the particle size and its resultant bandgap, based on the material being used and its bandgap in the bulk form (Equation 1).9 In the equation, EgQD is the theoretical bandgap of the quantum ... being free of heavy metals), and ability to coordinate ligands and functional groups to the surface 2.3 Quantum Dot Synthesis Techniques The history of quantum dot synthesis reaches back to glass...

Ngày tải lên: 15/05/2014, 10:25

... stabilization An in-depth study is required, and further experiments are underway to understand and investigate the exact mechanism and the role of TG in the synthesis of CuO nanowires In order to ... contributions ASE did the synthesis and performed tests on the samples DJK conceived and designed the experiments ASE and DJK wrote the manuscript All authors read and approved the final manuscript ... gates and computation from assembled nanowire building blocks Science 2001, 294:1313-1317 Hu J, Odom TW, Lieber CM: Chemistry and physics in one dimension: synthesis and properties of nanowires and...

Ngày tải lên: 20/06/2014, 21:20

... Authors’ contributions JDP and KST built the synthesis system and instrumented a closed-loop temperature control JDP and HJE carried out the experiments and data collection KST and JDP interpreted the ... vents Two main components of the synthesis system - the source and growth substrates - are contained within the sealed quartz chamber and flushed with argon and oxygen at a ratio of 99.67% to ... melting point of zinc (420°C), substrate type and temperature, and thermal annealing temperatures Figure shows the optical image and SEM images (top view and edge-on view) of a typical ZnO film deposited...

Ngày tải lên: 20/06/2014, 22:20

... paper JS, HP, JWK, and KK participated in the characterization of samples and carried out experiments VM contributed to the technical discussions All the authors have read and approved the final ... (M = Mn0.5-yNi0.5-yCo2yand Ni1-yCoy) solid solutions Chem Mater 2007, 19:3067-3073 15 Johnson CS, Li N, Lefief C, Vaughey JT, Thackeray MM: Synthesis, characterization and electrochemistry of ... high temperature synthesis of layered electrodes have been reported [12,15] The morphology and size distribution of the Li[NixCoxLi1/3-x-Mn2/3-x]O2 system were examined by FE-SEM and is shown in...

Ngày tải lên: 20/06/2014, 23:20

... core and BeO buffer layer to only 7.7%, which is the optimized situation to minimize lattice misfit between ZnO and BeO and thus obtain a quite smooth core/shell interface On the other hand, ... in (b) island growth will occur to release internal stress, and the grains tend to grow in random orientation to minimize the surface energy Correspondingly, a polycrystalline shell and a rough-textured ... originates from the type I band alignment between ZnO and BeO, in which the valence band maximum of BeO is of lower energy than that of ZnO, while the conduction band minimum of BeO is of higher...

Ngày tải lên: 21/06/2014, 00:20