synthesis of ferrite nanoparticles

... 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)] ... micrograph clearly illustrates individual nanoparticles as well as a number of aggregates The measurement of size was performed along the largest diameter of the particles The particles are found ... 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...

Ngày tải lên: 22/06/2014, 18:20

... solution of 10−3 M and 10−4 M silver nitrate (AgNO3 ) and 10−2 M of D-sorbitol was prepared and used for the synthesis of silver nanoparticles mL of extract and mL of D-sorbitol were added to 40 mL of ... rapid green synthesis of silver and gold nanoparticles, ” Spectrochimica Acta Part A, vol 78, no 2, pp 899–904, 2011 R Veerasamy, T Z Xin, S Gunasagaran et al., “Biosynthesis of silver nanoparticles ... mediated greener synthesis of silver and gold nanoparticles, ” Process Biochemistry, vol 45, no 7, pp 1065–1071, 2010 S L Smitha, D Philip, and K G Gopchandran, “Green synthesis of gold nanoparticles...

Ngày tải lên: 02/07/2014, 13:09

Ngày tải lên: 13/11/2014, 09:29

... (220) planes of fcc structure of copper (Fig 4) Fig X-ray diffraction PVP patterns of CuNPs- Characterized by TEM The TEM image of the 5th sample showed that the average size of copper nanoparticles ... The FE-SEM image of copper oxalate showed particles in the size range of under 150 nm (Fig 2) Fig XRD pattern of copper oxalate Fig The FE-SEM image of copper oxalate Proceedings of IWNA 2011, November ... Pink Disease drug for rubber tree at low concentration (dose of resistance fungus of about 5-7ppm (Fig.6) and dose of kill fungus of about 10ppm (Fig.7) CONCLUSIONS Copper colloidial solutions...

Ngày tải lên: 02/08/2015, 13:21

... different parts of plant extracts are ecofriendly, economical and safe for the synthesis of nanoparticles Use of flower extract for synthesis of nanoparticles has an added advantage of environmental ... 2007) 2.4 Synthesis of silver nanoparticles Aqueous solution (1 mM) of silver nitrate (AgNO3) was prepared and used for the synthesis of silver nanoparticles ml of extract was added to 40 ml of mM ... reduction of Ag+ ions The synthesis of silver nanoparticles was carried out at room temperature (25 °C ± °C) for UV–Vis spectra of synthesized nanoparticles were monitored as a function of time of reaction...

Ngày tải lên: 02/09/2015, 13:46

... (TEM) of the nanoparticles was done by JEM 100CX (Japan Electron Optics Laboratory, Japan) MnZn ferrite b a 10 20 30 40 Results and discussion 50 60 70 80 Two Theta(Deg.) XRD patterns of the ... of XRD patterns, crystalline of synthesized nanoparticles was improved Figure shows XRD patterns of synthesized powders using conventional heating In the XRD pattern of the powders after heating ... heating time increased to h, in Fig 2b, better growth ferrite nanoparticels can be gotten MnZn Ferrite Fig XRD patterns of Mn0.5Zn0.5Fe2O4 nanoparticles prepared by co-precipitation method using...

Ngày tải lên: 22/06/2014, 22:20

... images of the core/shell structure of the SiNWs wrapped Au nanoparticles The average particle size of the wrapped Au nanoparticles in the composite SiNWs is ± 1.5 nm It is noted that the Au nanoparticles ... (1120 °C) will lead to a large amount of carbon nanoparticles having high chemical activity The growth of SiNWs may start from the reaction of the active carbon nanoparticles with the native oxide ... 3b shows a TEM image of individual curly wire with 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...

Ngày tải lên: 16/03/2014, 15:06

... high carbon content is due to the existence of carbon nanoparticles on the surface of nanowires The existence of carbon nanoparticles on the surface of nanowires is also identified by Raman measurement ... carbon nanoparticles have been synthesized using thermal decomposition of ethanol The existence of carbon nanoparticles induced strong carbon-related bands in Raman spectrum The enhancement of blue ... result of SEM observation, smooth surface was observed from TEM image of the nanowires synthesized under the condition-2 Meanwile, a lot of hemispheric depositions were found on the surface of the...

Ngày tải lên: 16/03/2014, 15:08

... evidence of the solubility limits of Sn4þ in the hematite structure and of Fe3þ in SnO2 are discussed the compositional uniformity The determined average values of x; for the analyzed series of mixed ... with coordinates of ð0; 0; zÞ occupy 2/3 of the octahedral holes in successive oxygen layers, and 1/3 of the octahedral holes with coordinates of ð0; 0; 0Þ are empty In the case of our samples, ... preparative methods In this paper we report the synthesis of the (1 x)aFe2O3 – xSnO2 nanoparticles via a hydrothermal route over the entire concentration range of x ¼ 0:0 – 1:0: X-ray (XRD) and electron...

Ngày tải lên: 19/03/2014, 16:48

... Journal of Science, Mathematics - Physics 25 (2009) 221-230 In this paper, we report on synthesis and characterization of gold NPs as well as CoPt and FePt NPs Experimental Synthesis of gold ... consists of the following steps [14]: Functionalizing gold nanoparticles with 4-ATP (C6H7NS) Different volumes of 4-ATP mM were added into 20 ml of the gold NPs containing solution The colors of the ... kept at room temperature (RT) Step 2: Growth of nanorods: ml of 0.2 M CTAB solution was added to ml of mM chlorauric acid solution Then a few hundred μl of mM silver acetate (AgC2H3O2) solution was...

Ngày tải lên: 28/03/2014, 13:20

... 4.2.2 Synthesis of Semiconductor Nanoparticles in Liquid Crystals 4.2.3 Synthesis of Magnetic Nanoparticles in Liquid Crystals 4.2.4 Synthesis of Miscellaneous Nanoparticles ... Micelles 4.5.1 Synthesis of Metal Nanoparticles in Reversed Micelles 4.5.2 Synthesis of Semiconductor Nanoparticles in Reversed Micelles 4.5.3 Synthesis of Magnetic Nanoparticles in ... 4.5.4 Synthesis of Miscellaneous Nanoparticles in Reversed Micelles Nanoparticle Synthesis in Microemulsions 4.6.1 Synthesis of Metal Nanoparticles in Microemulsions 4.6.2 Synthesis of...

Ngày tải lên: 04/06/2014, 15:18

... light of orange color on the whole (Figure 3B) It is noted that the as-prepared nanoparticles are cubic phase, whose fluorescence efficiency is at least one-order of magnitude less than that of ... spectrum (Figure 5) was obtained after ultrasonic dispersion of a wt.% solution of the products in nhexane, compared with the spectrum of nanoparticles before annealing, its green emission plays ... upconversion-luminescent nanoparticles Angew Chem Int Ed 2005, 44:6054-6057 Zeng JH, Su J, Li ZH, Yan RX, Li YD: Synthesis and upconversion luminescence of hexagonal-phase NaYF4:Yb, Er3+ phosphors of controlled...

Ngày tải lên: 20/06/2014, 22:20

... Synthesis and characterization of nanocrystals of barium titanate, toward a generalized synthesis of oxide nanoparticles J Am Chem Soc 2001, 123:12085-12086 Urban JJ, Yun WS, Gu Q, Park HK: Synthesis ... of 7-nm BaTiO3 nanoparticles agree well with early references which have been measured using Page of 110 200 186 169 40 50 2Theta / o o 715 -190 C 60 o 115 -100 C 70 Figure The XRD profiles of ... ultrafine tetragonal BaTiO nanoparticles is synthesiezd in our system The synthesis mechanism of BaTiO3 nanoparticles is believed to undergo two steps [24], hydrolysis of alkoxide to form titanium...

Ngày tải lên: 21/06/2014, 01:20

... Additional file 1) Synthesis of AuNPs To illustrate the effects of CO gas flow injection rates on nanoparticle synthesis, nanoparticles were synthesized from an aqueous solution of HAuCl acid at ... Effect of CO flow rate on nanoparticle spectral profile Normalized UV-visible spectra of nanoparticles synthesized from a chloroauric acid concentration of 0.03 mM aerated at flow rates of 16.9, ... matter Nanoparticles synthesized at a flow rate of 31.59 mL/ consisted of aggregated particle chains A CO flow rate of 37 mL/min (Figure 1C) resulted in aggregated particle chains similar to that of...

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 ... efficiency of Fe2O3/SWNTs nanohybrids with a current density of 150 mA g-1 Page of Zhao et al Nanoscale Research Letters 2011, 6:71 http://www.nanoscalereslett.com/content/6/1/71 Page of Figure ... Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (SZD 09003), and the National Key Project on Basic Research (Grant No 2009CB939801, 2011CB935904) of China Authors’...

Ngày tải lên: 21/06/2014, 06:20

... toxicology of nanoparticles by The European Centre for Ecotoxicology and Toxicology of Chemicals [30] In light of these studies, we report here on the synthesis and characterization of various ... biocompatibility of Y2O3 nanoparticles, various nanoparticles of Y2O3 were synthesized as detailed in the following paragraphs (‘‘Nanoparticle Synthesis ’) The as-synthesized nanoparticles were ... comprised of aggregates of nanoparticles After 30 min, only square platelets are found The TEM image of the Y2O3 nanoparticles synthesized via the solvothermal method [47], Fig 3, shows clumps of individual...

Ngày tải lên: 22/06/2014, 00:20

... formed nanoparticles The size of CdS nanoparticles biosynthesized by living immobilized R sphaeroides could vary with the culture time The way of the size-controlled biosynthesis of CdS nanoparticles ... sphaeroides cells Size-Controlled Biosynthesis of CdS Nanoparticles The growing phase of cells was found to be an important factor in modulating the morphology of CdS nanoparticles because they evidently ... CdS nanoparticles are composed of the elements Cd and S, and the ratio of Cd:S is 0.97:1.00, being in with the expected value A representative HRTEM image at low amplificatory times of the CdS nanoparticles...

Ngày tải lên: 22/06/2014, 00:20

... irrespective of the nature of surfactants Aggregation Behavior of Surfactants in Presence of ZnS Nanoparticles The aggregation behavior of both the surfactants in the presence of respective nanoparticles ... function of concentration and size of nanoparticles Therefore, timedependent absorption of ZnS nanoparticles can be used to compare the evolution and growth of nanoparticles in the Nanoscale Res ... 100 Time (min) Fig UV absorbance of as-prepared ZnS nanoparticles in aqueous solution of CTAC and CPyC measured at 294 nm as function of time The growth of ZnS nanoparticles in CTAC is faster...

Ngày tải lên: 22/06/2014, 00:20

... spectroscopy of the NE sample further confirm the absence of the template and the presence of the organic groups The sample has a typeIV isotherm with a BET surface area of 815 m2 g-1 and pore volume of ... h under the formation of a white solid The solid particles were centrifuged off The template was extracted by stirring the solid in a mixture of 100 g of acetone and 10 g of M HCl The extracted ... mixture of 0.76 mmol 1: x (x = 51 mmol NaCl: 0.11 mmol P123: 33.6 mmol HCl: 310 mmol H2O) was used The PMO NFs have a diameter of *100 nm The length of as-synthesized NFs extends to tens of lm...

Ngày tải lên: 22/06/2014, 00:20

... pattern of the FS6 nanoparticles 123 498 diffraction angle in Fig 1, corresponds to the amorphous SiO2 shell Figure shows the representative TEM images of iron oxide nanoparticles and FS6 nanoparticles ... the existence of Rhodamine 6G in the FS6 nanoparticles Figure gives the FT-IR spectra of neat Rhodamine 6G, silica-coated magnetic particles (denoted as FS nanoparticles) , and FS6 nanoparticles ... [22] and FS nanoparticles [10] could be Nanoscale Res Lett (2008) 3:496–501 499 Fig FT-IR spectra of neat Rhodamine 6G, FS, and FS6 nanoparticles well resolved The FT-IR spectrum of FS6 nanoparticles...

Ngày tải lên: 22/06/2014, 01:20