amine assisted synthesis of aluminum oxide

... planes of silicon The crystallinity of the nanowires is considerably higher when only argon was used instead of a mixture of argon and hydrogen The role of hydrogen in promoting the amorphization of ... has a Y-shape, with arms of a uniform width of 200 nm, and a length of a few microns Careful studies of the TEM images and electron diffraction data may unravel the nature of the junction In Fig ... characteristic of cubic silicon with a small impurity of silica Reaction of silicon powder with activated carbon in the absence of H2 , by procedure (ii), yielded abundant quantities of SiNWs The...

Ngày tải lên: 16/03/2014, 15:04

... the average diameter of 400 nm, revealing the typical structure of wire-like spherical particle agglomerates at the end of the wire Fig 3c shows a magnified TEM image of a part of individual relatively ... formation of the SiNWs; (2) in the addition of a procedure that Si substrate was cleaned with aqueous solution of 5% HF for 10 to remove the native oxide layer, to verify whether the native oxide ... This native oxide layer is reduced by carbon nanoparticles to yield silicon monoxide, and then the nucleation site of the Si nanostructures is formed by the decomposition of silicon monoxide The...

Ngày tải lên: 16/03/2014, 15:06

... in the presence of CTAB and the morphologies of WO3 were independent of the HCl When 1.2 g Na2S and 0.8 g CTAB were added at the same time, the morphologies Fig XRD patterns of WO3 nanobelts ... be concluded that addition of Na2S and CTAB at the same time is important and both of them affect corporately on the formation of WO3 nanobelts The growth mechanism of crystal is determined by ... formation of WO3 nanobelts The effect should be able to be extended to the synthesis of other 1D nanomaterial Acknowledgments We wish to acknowledge the financial support from the Foundation of Educational...

Ngày tải lên: 20/03/2014, 13:04

... fraction of magnetite In this paper, we report a facile one-pot synthesis of PANI/magnetite nanorod composites through DBSA micelleassisted synthesis by in situ self-assembly method The presence of ... the decomposition of PANI As seen from the TGA curves, the rate of weight loss of PANI (curve a) is much fast, the residue of PANI is 44.06%; while the rate of weight loss of PANI/magnetite nanocomposites ... the ice-water bath Then, ml of X Ding et al / Journal of Colloid and Interface Science 320 (2008) 341–345 343 Fig Schematic illustration of the synthesis process of PANI/magnetite nanorod composites...

Ngày tải lên: 20/03/2014, 13:04

... 315-318 Page of 14 Caption of figures Fig X-ray diffraction pattern of alpha phase iron oxide nanowires Fig SEM and TEM Images of Fe2O3 nanowires and precursors a) The SEM image of ip t Fe2O3 ... that can reveal the electrochemical mechanism of reactions Fig shows the first three cycles of CV curves of Page of 14 the nanowires in the range of 0.01-3 V It is clear that there is a substantial ... of the inner part of the single nanowire The HRTEM image clearly shows the microstructure of the individual grains, which confirms the polycrystalline structure of the nanowires The spacing of...

Ngày tải lên: 20/03/2014, 13:05

... Synthesis of nanorods 2.1 Materials The mixture for the synthesis of iron oxide nanorods contained mL of freshly dried [BMIM][Tf2 N], 40 ␮L (0.13 mmol) of oleic acid, 43 ␮L (0.09 mmol) of oleylamine ... 2.2 General synthesis and separation procedures In a typical synthesis of iron oxide nanoparticles, freshly dried [BMIM][Tf2 N] was mixed with predetermined amount of oleic acid, oleylamine and ... of hexane and then centrifuged at 8000 rpm for 10 2.5 Synthesis of 13 nm nanocubes The typical synthetic mixture contained mL of [BMIM][Tf2 N] and 48 ␮L (0.15 mmol) of oleic acid The amount of...

Ngày tải lên: 20/03/2014, 13:08

... aquarium pump Method of Synthesis of metal oxides Fig Flow diagram of the synthsis process of Pd+CuO 92 Inorganic Nanomedicine: Synthesis, Characterization and Application Preparation of Pd (0)-water ... composition of surface was made up of atoms of palladium, copper and oxygen The XRD spectra confirmed the phases as palladium and copper (II) oxide This novel sonochemical synthesis of metal oxides ... palladium salts were used, a mixture of 20 mL ethanol and 70 mL water was used for making Pd-water slurry Synthesis of Pd(0)-metal oxide slurry Typically for the synthesis of CuO, copper acetate was used...

Ngày tải lên: 11/06/2014, 12:29

... http://www.nanoscalereslett.com/content/6/1/399 Page of Figure Optical performance of CdTe cores and corresponding CdTe/CdSe type II QDs by means of microwave -assisted synthesis The optical performance of a series of original CdTe ... means of microwave -assisted synthesis The QD samples are excited at their first excitation absorption peak, and The PL intensities of all the samples are normalized (a) Fluorescence spectra of CdTe ... intensity This improvement of the photostability of CdTe/CdSe QDs was probably due to the protection of the shell to prevent the oxidization of Te2- on the surface of CdTe QDs, thus retained...

Ngày tải lên: 21/06/2014, 03:20

... structures of these nanocrystals Typical HR-TEM image of Fe2O nanocrystals with diameters of approximately nm presents a crystal lattice of approximately 0.25 nm, corresponding to (110) planes of a-Fe ... regular interplanar spacing of 0.33 nm for SnO2, 0.27 nm for CeO , was ascribed to (110) planes of SnO , (200) planes of CeO2, respectively However, as for the rare earth metal oxide Er2O3, it did not ... introducing NPs of different rare Zhao et al Nanoscale Research Letters 2011, 6:71 http://www.nanoscalereslett.com/content/6/1/71 Figure TEM images of various metal oxide NPs of Fe2O3, SnO2,...

Ngày tải lên: 21/06/2014, 06:20

... temperature synthesis of VA-CNTs Large-scale Monte Carlo simulations [37] of SWNT synthesis showed that PECVD methods were more suitable for low temperature synthesis and had two orders of magnitude ... Plasma-heating effect of the substrates casts doubts on the credibility of previously reported results of low temperature synthesis of CNTs/CNFs using high plasma power However, plasma power of 200–300 ... evolution of the graphitization of SWNTs synthesis due to reactive ion-etching effects The growth kinetics of SWNTs was monitored using Raman spectroscopy whereby the degree of graphitization of SWNTs...

Ngày tải lên: 21/06/2014, 07:20

... for the synthesis of other functional oxide materials Experimental Preparation of NiO Nanostructures In a typical synthesis, appropriate amount of nickel powder was taken with 20 mL of distilled ... knowledge, this is the first report of synthesis where water is used as a solvent as well as a source of oxygen Our studies lay down a convenient producer for the synthesis of NiO nanostructures at low ... temperature approach to the synthesis of NiO nanoparticles and nanoflowers by a soft reaction of nickel powder and water without using organic dispersant or capping agent To the best of our knowledge, this...

Ngày tải lên: 22/06/2014, 01:20

... attributed to the ion assisted growth of the crystallites which may be different for OHassisted growth in the case of S1 and Cl- assisted growth in S2 and Cl- and NH4? assisted growth in S3 The ... polycrystalline nature of the sample Lattice image (d) of these nanospheres shows lattice fringes of the rutile phase with d = 0.32 nm, which matches well with that of (110) plane of rutile titania ... NH4Cl (5.0 M) were employed for the synthesis A typical microwave oven (Whirlpool, 1200W) operating at a frequency of 2,450 MHz was used for the synthesis Synthesis of TiO2 Nanostructures A general...

Ngày tải lên: 22/06/2014, 01:20

... importance of titanium and environmental issues related to the production of nanopowders, the present work reports an eco-friendly biotechnological approach for the synthesis (lactobacillus assisted) of ... particle size is estimated to be of the order of 40 nm The criterion adopted for evaluating the rightness, reliability of the indexing and the P P structure of titanium was Dd = (dobs–dcalc)] ... Nanoparticles of Ti were prepared using the procedure adopted by Nair and Pradeep [8] with slight modifications The filtrate was diluted times and pH of the culture solution was noted in the range of 2–4...

Ngày tải lên: 22/06/2014, 18:20

... Design of Experiment 31 3.2 Synthesis of Carbon Coated Tin oxide (SnO2@C) Hollow Spheres 34 3.2.1 Synthesis of PVP-Modified Polystyrene (PS) Beads 34 3.2.2 Synthesis of Tin Oxide ... aforementioned problems of these two oxides The detailed descriptions on both metal oxides are mentioned below 1.3.2 TIN OXIDES AS ANODE MATERIALS Tin oxides, including Tin(II) Oxide and Tin(IV) oxide, both ... Fe3O4 Nanoparitlces (IONP) 90 6.2.2 Synthesis of Iron Oxide Nanoparticles Embedded in Polymeric Composite (IONP@PC) 90 6.2.3 Synthesis of Iron Oxide Nanoparticles Embededd in Mesoporous...

Ngày tải lên: 10/09/2015, 09:30

... AFM topography and phase images of the AAO membrane after (a and b) 70 and (c and d) 90 of etching Figure Stages of chemical etching process of the anodic aluminum oxide barrier layer Etching progress ... (26) Xu, T T.; Piner, R D.; Ruoff, R S Langmuir 2003, 19, 1443 Langmuir, Vol 23, No 3, 2007 1565 Figure Schematic drawing of the cross section of a nanopore aluminum to aluminum cation (Al f Al3+), ... template synthesis, and chemical sensing applications Acknowledgment Work at Argonne National Laboratory is sponsored by the U.S Department of Energy, Office of Basic Energy Science, Division of Materials...

Ngày tải lên: 19/03/2014, 16:47

... and the partial collapse of the substructure of the microspheres should be the main reason of the decrease of effective surface area of the annealed samples Fig TEM image of the WO3 ·xH2 O nanorods ... tungsten oxide surface Charge transfer is likely to occur from WO3 to absorbed NO2 because of the strong electron-withdrawing power of the NO2 molecules, which leads to the increase of thickness of ... is currently an associate professor at University of Toyama His research interests are in the areas of semiconducting oxide gas sensors and the deposition process of sputtered films Yanbai Shen...

Ngày tải lên: 19/03/2014, 16:48

... by various factors of evaporation apparatus such as diameter of the reacted tubes, the temperature gradient of the furnace, the nature of the boat and substrate, the positions of the substrates ... previous reports [6,20] This could offer a suitable application of Please cite this article in press as: N Van Hieu, Highly reproducible synthesis of very large-scale tin oxide nanowires used for screenprinted ... reproducible synthesis of very large-scale tin oxide nanowires used for screenprinted gas sensor, Sens Actuators B: Chem (2009), doi:10.1016/j.snb.2009.02.043 G Model SNB-11344; No of Pages ARTICLE...

Ngày tải lên: 19/03/2014, 16:48

... acid Because the etching rate of the top surface of AAO is much slower compared with the etching rate of the side wall of AAO, it is assumed that the top surface of AAO is not etched much To verify ... rate of the top surface of AAO was much slower than the rate of the pore side wall, as shown in dashed lines of Fig 1(b) It is due to the mechanical packing stress is applied to the middle of the ... etching rate of the top surface is much slower compared with the etching rate of the pore of AAO in the pore widening process Fig (a) SEM image of AAO in side view and (b) schematic diagram of the...

Ngày tải lên: 20/03/2014, 13:04

... Physics Letters A 318 (2003) 440–444 the view point of one-dimensional nanoscale materials synthesis, we studied the stability difference of the AAOMs before and after calcinations The AAOMs ... (99.999%) aluminum foil as the starting material, three groups of AAOMs were prepared in oxalic acid/sulphuric acid/phosphoric acid solution separately with all the acid concentration of 0.4 mol/l ... about 150, 65 and 400 nm, respectively The diameter of the nanopores can be adjusted by phosphoric acid solution After removal of the remaining aluminum, the AAOMs were put into a 30 ◦ C phosphoric...

Ngày tải lên: 20/03/2014, 13:08

... radiation The surface morphology of tungsten oxides thin film was examined by a fieldemission scanning electron microscope of a JEOL JSM-6700F The thickness measurements of the films studied in this ... temperature of 400 1C, the former morphology of sample C changed rimous and rough Such surface mophology of sample D could be due to the agglomerated growth of grains and the formation of good crystallinity ... image of XPS was conducted to determine the surface oxidation states of the tungsten oxide thin film sample Fig 5a shows survey scans spectra recorded within a range of and 1000 eV at a takeoff...

Ngày tải lên: 20/03/2014, 13:08