synthesis growth and agglomeration behavior of zns nanoparticles

... 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 ... calibrated with standard KCl solutions, and the obtained cell constant was 1.02 cm-1 Results and Discussion Formation of ZnS Nanoparticles and Optical Characterization The formation of ZnS nanoparticles ... spectra of as-prepared ZnS nanoparticles in aqueous micellar solution CTAC and CPyC (b) Respective Tauc plots for the determination of the band gap of ZnS nanoparticles 1.2 (b) (a) 1.0 ZnS NPs...

Ngày tải lên: 22/06/2014, 00:20

... Director, Office of Energy Research, Office of Basic Energy Sciences, Materials and Chemical Sciences Divisions of the U S Department of Energy under Contract DE-AC03-76SF00098 We thank Professor ... volume of 1.16 cm3 g-1 2.3 Preparation of Pt/SBA-15 Pt colloidal aqueous solution (25.6 mL, × 10-3 M) was mixed with 74.4 mL of water and 100 mL of ethanol The mixture was quickly added to 1.5 g of ... nm, (d) 3.6 nm, and (e) 7.1 nm 3.2 Synthesis and Characterization of Pt/SBA-15 Catalysts 3.2.1 Incorporation of the Pt Particles in SBA-15 Structure SBA-15 with a pore diameter of 9.0 nm was used...

Ngày tải lên: 08/10/2015, 23:16

... 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, ... –xSnO2 nanoparticles Major ¨ changes in Mossbauer line shape and the disappearance of magnetic hyperfine structure as tin content in the samples M Sorescu et al / Journal of Physics and Chemistry of...

Ngày tải lên: 19/03/2014, 16:48

... AJ888885) Comparison of genomic and cDNA revealed two introns with a size of 58 and 64 bp Removal of the introns led to an open reading frame of 465 amino acids and a molecular mass of 51.41 kDa, which ... observed Formation of sterigmatocystin (ST), a precursor of aflatoxin B1, the synthesis of ascoquinoneA, a polyketide giving the sexual ascospores the red-brown colour and synthesis of naphtopyrone, ... on growth and polyketide synthesis, which is much less pronounced in case of A fumigatus The propionyl-CoA levels in A nidulans dropped below that of acetyl-CoA, when equal amounts of acetate and...

Ngày tải lên: 23/03/2014, 15:20

... effect of Zn2+ partially substituting for Co2+ in CoFe2O4 nanoparticles (Co1-xZnxFe2O4; x = 0, 0.5, and 1) and shelling with silica on the magnetic and optical properties of the ferrite nanoparticles ... The gel was dried and fired at temperatures of 400°C, 600°C, and 800°C for h to form CoFe2O4 (CF), ZnFe2O4 (ZF), and Co0.5Zn0.5Fe2O4 (CZF) nanoparticles Silica-coated magnetic nanoparticles were ... ferrite nanoparticles) This is due to the effect of the change of color on the optical properties of the ferrite nanoparticles from black at CoFe2 O4 , to brown at Co 0.5Zn0.5Fe2 O4 and to orange...

Ngày tải lên: 21/06/2014, 01:20

... of a scanning electron microscope According to the knowledge of the authors, this is the first time that the tensile behavior of rutile TiO2 1D nanostructures is reported Materials Synthesis and ... introduction of sccm O2 into the reaction chamber suppressed the growth of TiO2 nanostructures, but enhanced the formation of polycrystalline TiO2 film Similar results have been seen from growth of TiO2 ... measurement errors, existence of possible impurities, surface relaxation [17], and the nature of substrate materials could all play a role The growth direction of the nanostructure is around...

Ngày tải lên: 22/06/2014, 00:20

... MECHANICALLY ACTIVATED SYNTHESIS AND MAGNETORESISTANCE OF MOO2-BASED SR2FEMOO6 66 5.1 EFFECTS OF MECHANICAL ACTIVATION ON THE PHASE FORMATION AND MAGNETORESISTIVE BEHAVIORS OF SR2FEMOO6 ... Extensive band structure calculations have been carried out to understand the electronic and magnetic structures of Sr2FeMoO6 [20, 41, 43] The results of a typical calculation of the density of states ... fragment of the XRD Rietveld profile for Sr2FeMoO6 derived from mechanical activation and then sintered at 1100 °C in Ar ………………………… 52 Figure 4.1 XRD patterns of the mixed oxides of SrO, Fe2O3 and...

Ngày tải lên: 10/11/2015, 12:35

... route to SCD children with growth retardation (weight and height ,5th centile) led to a rapid and sustained increase in growth and a reduction of pain crises and episodes of infection.15 The authors ... the pattern of height and weight, and time of menarche correlated well with weight and age Height and weight impairment at all ages and in both sexes compared with published growth reference values ... in boys and 0.6 years in girls By the age of 8, this had increased to and 1.3 years in boys and girls, respectively Children with SC disease showed no growth deficit.32 The time of the growth...

Ngày tải lên: 12/02/2014, 19:20

... time of stress and in the context of a dollarized economy (Leon and Quispe, 2010) Using data for Brazil, Evandro and Takeda (2011) and Glocker and Towbin (2012b) have analyzed the effect of RRs ... absence of market power, and if the supply of deposits was replicated as the aggregate behavior, loan supply would be higher and determined by the intersection of the supply of deposits and the ... RR measure is based on a simple average of rates (in Brazil of demand and savings deposits; in Colombia of checking and saving accounts, CD and bonds, and in Peru the required rate as published...

Ngày tải lên: 06/03/2014, 04:21

... episodes and cases of rapid credit growth; discusses possible implications for macroeconomic and financial stability; and discusses the pros and cons of a number of instruments—both macroeconomic and ... Funding of the Credit Growth 19 Menu of Policy Options in Responding to Rapid Credit Growth 24 Boxes Analysis of the Nature of Credit Growth .7 Appendices I Data and Methodology ... acceleration of credit growth The distinctive feature of this paper is that it concentrates on the supervisory and prudential implications of rapid credit growth, and on how prudential and supervisory...

Ngày tải lên: 06/03/2014, 08:20

... diffusion of Si/SiOx vapors into the metal particles, (ii) formation of liquid droplet of metal and Si/SiOx and (iii) the precipitation in the form of solid nanowires after super-saturation of liquid ... agglomerated clusters consisting of high density of nanowires The magnified view of a single cluster is depicted in the inset of Fig 2(d) These observations suggest that growth of nanowires in the present ... the rate of 40 l/h The source SiO was then heated at 1200 1C for h in argon ambient (99.95%) with traces of oxygen and moisture Therefore, the growth time was h After completion of the growth process...

Ngày tải lên: 16/03/2014, 15:18

... a very soft reaction that favors the growth of crystal will take place However, the changes in the number of the reductant and the species of precipitator would influence the synthesis of product ... surface of microspheres was made of a number of small subunits, each of which is like a tetrahedron crystal in shape and uniform in size and packed densely Fig 1e clearly exhibits that each of the ... ripening and the attachment growth mechanism were responsible for the formation of Fe3O4 microspheres and the growth of tetrahedron subunit, respectively The Fe3O4 microsphere made up of tetrahedron...

Ngày tải lên: 20/03/2014, 13:08

... consisting of WO3 and W There are two characteristic binding energies (707.4 and 711.4 eV) for the photoelectron line of Fe 2p3/2, as illustrated in Fig The binding energies of 707.4 and 711.4 ... (0 1) of WO3, according to JCPDS card No 20-1324 Figs 2c and d also show that the thin layer covering the nanorods is in amorphous The thickness of the amorphous coatings and the size of the ... results indicate that most of the WO2 and part of the W could be oxidized to WO3 after air annealing at 573 K Iron and its oxide could be indexed in the XRD patterns of both samples However, the...

Ngày tải lên: 20/03/2014, 13:08

... Positions of the antigenic epitopes for MAbs on the ribbon model of human L-PGDS, which is composed of nine b-strands (strand A, Gly40–Ala49; strand B, Cys65–Ala72; strand C, Gly76–Arg85; strand D, ... immobilized MAb-5C11 and MAb-10A5 bound to the soluble form of b-trace with Kd values of 91 and 2900 nm, respectively, and to the recombinant D1)22Cys65,167Ala L-PGDS with values of 167 and 57 nm, respectively ... Gln88–Pro98; strand E, Ser104–Arg108; strand F, Tyr116–Thr123; strand G, Val128–Gly135; strand H, Phe143–Ser150; strand I, Ile177–Phe179) and a three-turn a-helix (Ala157–Ala169) The epitopes of MAb-5C11,...

Ngày tải lên: 30/03/2014, 01:20

... relationships of prolidase, hence providing a greater understanding of the characteristics of this peptidase, which would be of industrial use in the debittering of fermented foods Results and Discussion ... pKK223-3, and the expression system produced a large amount of recombinant protein under the preferred growth conditions (37 °C in LB broth) of the Escherichia coli TOP 10 F’ hosts The amount of recombinant ... that of Lb casei prolidase [11] and higher than that of Lb delbrueckii prolidase [4] This loss of activity in the recombinant Lc lactic prolidase was most likely due to denaturation between 60 and...

Ngày tải lên: 30/03/2014, 04:20

... determination of medium related parameters (i.e., the parameters of Eqs (14) and (15)), and (ii) determination of growth and production related parameters (i.e., the parameters of Eqs (1) – (6)) ... Obviously, use is made of relations (14) and (15) and the determined values for a, b, c, a1, b1, c1 and pH0 to determine the input values [LaH](t) and [H + ](t) of the specific growth and production ... description of N, LaHtot and pH as a function of time is obtained Future research will focus on the experimental validation of the computation method of [LaH] and pH for different growth media and different...

Ngày tải lên: 05/05/2014, 08:44

... time in terms of profitability, efficiency, and liquidity ratios The sign and the significance level for a majority of micro and macro level variables change between the 1990s and the 2000s The ... financial needs of foreign owned banks In terms of profitability, the entrance of foreign banks increased the amount of competition in the CEE markets, and hence caused a decline in the profit margins ... the means and standard deviations of both the micro level and the macroeconomic variables of interest over time show indications of a structural break in the dataset across the 1990s and the 2000s...

Ngày tải lên: 03/06/2014, 02:21

... Page of Figure Cross-sectional FESEM images of ZnS films grown at different substrate temperatures (a) 100°C and (b) 350°C The influence of the substrate temperatures on the surface morphology of ... designed and carried out the experiments and wrote the first draft of the manuscript JHA analyzed the properties and helped draft the manuscript KNH and KSH detailed the original idea and modified ... Valenzuela and Russer reported that the FWHM of an XRD peak is reliant on the crystallite size and the lattice strain caused by the defect and/ or dislocations [16] The average particle sizes and FWHM...

Ngày tải lên: 20/06/2014, 21:20

... conduction band (CB) and the valence band (VB) of WO3 were higher than the CB and VB of TiO2 and fullerene When the hole and electron pairs were also generated and separated on the interface of WO3, ... synergistic effect of fullerene, WO3, and TiO2 Because of the least band gap of fullerene (1.6 to 1.9 eV), hole and electron pairs were generated and separated on the interface of fullerene easily ... WO3, electrons at the CB of WO3 migrated to CB of TiO2 and fullerene, and holes at the VB of WO migrated to VB of TiO2 and fullerene [33] This can allow the transfer of photogenerated electrons...

Ngày tải lên: 21/06/2014, 01:20

... http://www.nanoscalereslett.com/content/6/1/434 Page of A B Figure FETEM and HRTEM images of silver nanoparticles (a) FETEM image of silver nanoparticles (b) High-resolution image of a single silver nanoparticle and inset shows ... determine the intrinsic stress and dislocation density of silver nanoparticles and found to be as 0.275 GPa and 7.0 × -14 m-2 respectively Figure shows the FESEM image of silver nanoparticles It exhibits ... Page of Figure DTA-TGA themogram of silver nanoparticles and above 300°C It can be generally attributed to the evaporation of water and organic components Overall, TGA results show a loss of 14.58%...

Ngày tải lên: 21/06/2014, 02:20