phase synthesis of superparamagnetic magnetite nanoparticles

... pattern of PANI /magnetite was shown as curve b Clearly, the diffraction peaks of PANI /magnetite nanoparticles are similar to that Fig Typical SEM images of PANI /magnetite nanorod composites for magnetite ... 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 ... (499–682 ◦ C), the rate of weight loss of PANI (curve a) is similar with that of PANI /magnetite nanocomposites The final residue of PANI is 0.53%, while the final residue of PANI /magnetite nanocomposites...

Ngày tải lên: 20/03/2014, 13:04

... 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

... Synthesis of anisotropic metal nanoparticles motivates the development and innovation of theoretical methods for describing the unique properties of these nanoparticles The study of colours of ... 15] Synthesis of nanostructures via simple wet-chemical method is one of the most favoured routes towards the cost-effective large-scale production of nanobuilding blocks Chemical synthesis of ... with a very few number of spheres The histogram of nanodiscs distribution (Fig 2b) shows that majority of discs have a diameter of *55 nm On the other hand, HR-TEM photograph of green-coloured silver...

Ngày tải lên: 21/06/2014, 17:20

... resulting morphology of metal nanoparticles, because K? does not adsorb on metal nuclei to influence the morphology in the synthesis of metal nanoparticles [30] Synthesis of Pd nanoparticles from ... the case of Pd nanoparticles reveals the anisotropic shape of Pd nanoparticles with preferential orientation of {111} facet 123 184 Nanoscale Res Lett (2009) 4:181–186 Fig TEM image of intermediate ... reduction of Pd by oxalate occurs so rapidly and of UV irradiation is sufficient for the complete reduction of PdCl2 (20 mL of mM) to Pd nanoparticles High reducing ability and photosensitivity of oxalate...

Ngày tải lên: 22/06/2014, 01:20

... is induced by absorbed water of nanoparticles The second step below 300 °C in the TG curve is induced by crystal water of spinel phase TG curve shows the weight loss of sample prepared by microwave ... formation of ferrite phase within short time indicates the advantage of microwave heating When the microwave is applied in the system, microwave induces the rotation and migration of materials ... of materials because of the microwave energy transfers to the thermal energy by collision between rotating materials Therefore, the generation of localized high temperatures in the presence of...

Ngày tải lên: 22/06/2014, 22:20

... reported the formation of Ni-Ag core-shell nanoparticles by first generating Ni nanoparticles through the reduction of Ni2+ with N2H4 and followed by coating of the as-prepared Ni nanoparticles with ... the Colloidal Co Nanoparticles Optimization of process parameters for the fabrication of colloidal Co nanoparticles was done by investigating the effects of the molar ratio of N2H4 to Co2+ (R) ... precipitation of large nanoparticles was observed This phenomenon is attributed to the immediate supersaturation of the solution with Co atoms and the very fast growth rate of the nanoparticles. 10 Thus, synthesis...

Ngày tải lên: 07/08/2014, 14:20

... Title of Thesis/Dissertation: Solid -Phase Synthesis of N-Carboxyalkyl Unnatural Amino Acids Master of Science For the degree of I certify that in the preparation of ... CompoundsZZZZZ'ZZZZZ'ZZZZZ'ZZZ'11 1.2.3 Solution -Phase Synthesis of Substituted Amines by N-Alkylation with %-Halocarbonyl CNLONSMDQZZZZZZZZZZZZZZZZZZZZ'''13 1.3 Examples of Solid -Phase Synthesis of Substituted AminesZZZZZZ'ZZZ.18 ... Scheme 17 Use of N-Alkylation in the Total Synthesis of Ecteinascidin 743ZZ''ZZ14 Scheme 18 Microwave Synthesis of N-Alkylated CarbazolesZZZZZZZZ'''ZZ14 Scheme 19 The Synthesis of Bifunctional...

Ngày tải lên: 24/08/2014, 13:46

Ngày tải lên: 14/11/2014, 06:36

... 22  2.2  Materials Synthesis 23  2.2.1  Synthesis of nm Fe3O4 Nanoparticles 23  2.2.2  Synthesis of nm Fe3O4 Nanoparticles 24  2.2.3  Synthesis of MnFe2O4 Nano-Octahedrons ... 2.2.4  Synthesis of Silver Nanoparticles 25  2.2.5  Synthesis of Functional Amphiphilic Brush Copolymer 26  2.2.6  Synthesis of Fluorescent Amphiphilic Brush Copolymer 27  2.2.7  Synthesis ... CHAPTER 3:  Synthesis of Magnetic Nanoparticles and Functional Amphiphilic Brush Copolymer 41  3.1  Motivations and Design of Experiment 41  3.2  Synthesis of Iron Oxide Nanoparticles...

Ngày tải lên: 09/09/2015, 17:55

... SOLID -PHASE SYNTHESIS OF PURINE DERIVATIVES FU HAN (M.Sc., FUDAN UNIVERSITY) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMISTRY NATIONAL UNIVERSITY OF SINGAPORE ... SOLID -PHASE SYNTHESIS OF 1,7-DISUBSTITUTED PURINES 77 3.1 Introduction 77 3.2 Outline of our strategy 78 3.3 Results and discussions 79 3.3.1 Solution -phase synthesis study 79 3.3.2 Solid -phase ... thesis reports the development of novel methodologies for the solid -phase synthesis of purine derivatives The first project involves the solid -phase synthesis of 2,9-disubstituted-6-oxopurines...

Ngày tải lên: 15/09/2015, 17:09

... anhydride of 6a, prepared in situ by treatment of 6a with 0.5 equiv of DIC in a mixture of CH2Cl2 and DMF (entry 9).27 Submitting the resin to a second cycle of coupling increased the level of conversion ... 1).1,2 To investigate this hypothesis we sought a solid phase synthesis of which would be sufficiently general to allow production of a library of compounds for biological screening Figure a-Acylamino-a,a-disubstituted ... resin 13 did not offer any improvement over In conclusion, we demonstrated solid phase synthesis of prototypical a-acylamino-a,a-disubstitutedketones 1a and 1b However, the purity of the crude products,...

Ngày tải lên: 26/08/2016, 11:29

... crystalline nature of Fe3O4 nanoparticles with a clearly resolved lattice spacing of around 0.483 nm, corresponding to that of (111) of inverse spinel Fe3O4 crystal All the spots of Fourier transformed ... The XPS of the L-arginine-capped Fe3O4 nanoparticles Evidence for the existence of L-arginine coating can be found b The details of the Fe 2p1/2 and Fe 2p3/2 peaks M/emm⋅g-1 50 formation of ammonium ... amine groups of neighboring Fe3O4 nanoparticles This phenomenon is similar to the case of lysine-capped gold nanoparticles [41] To demonstrate potential biomedical applications of L-arginine-capped...

Ngày tải lên: 22/06/2014, 00:20

... 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 ... polymer network, resulted in the conversion of diamond-like carbon phase from polymer phase [15] TEM analysis of carbon films prepared by the heat-treatment of PPC above 600 °C confirmed that Intensity ... (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...

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

... 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 ... 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 ... H: Ionothermal synthesis of hexagonal -phase NaYF4:Yb3+, Er3+/Tm3+ upconversion nanophosphors Chem Commun 2009, 43:6628-6630 21 Ge JP, Chen W, Liu LP, Li YD: Formation of disperse nanoparticles...

Ngày tải lên: 20/06/2014, 22:20

... addition, the two phase transition temperatures merged into a single diffuse phase transition at higher NiO contents (Figure 4d) To check the effect of NiO on the degree of the diffuse phase transition, ... Rujijanagul*1 Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand Faculty of Materials Science, Department of Mechanical Engineering, ... composite system, Ba(Zr0.07Ti0.93)O3 (BZT93) ceramic/NiO nanoparticles, was fabricated to investigate the effect of NiO nanoparticles on the properties of these composites M-H hysteresis loops showed...

Ngày tải lên: 20/06/2014, 23:20

... ferroelectric phases [16] For the non-ferroelectric cubic phase of BaTiO nanoparticles that are synthesized in aqueous systems mostly, the study of phase transition is important to check if the nanoparticles ... a generalized synthesis of oxide nanoparticles J Am Chem Soc 2001, 123:12085-12086 Urban JJ, Yun WS, Gu Q, Park HK: Synthesis of single-crystalline perovskite nanowires composed of barium titanate ... 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

... http://www.nanoscalereslett.com/content/6/1/383 Page of Conclusions Biocompatible PAA-coated magnetite based ferrofluids containing SPM nanoparticles of ≈10 nm have been chemically synthesized The influence of several colloidal ... the physical properties of the ferrofluid: solvent viscosity, magnetic and hydrodynamic radius of the NPs, and the magnetic anisotropy energy constant of the magnetic core of the NP Adequately coated ... the synthesis of different biocompatible and monodisperse high quality single-domain magnetite NPs based ferrofluids and has been focused on the specific absorption rate (SAR) dependence of factors...

Ngày tải lên: 21/06/2014, 03:20