langmuir films of core shell latex particles

... surface of each pure ZW (Figures 4b, c), without deposition of isolated carbon islands by excess carbon pile-up This resulted in the formation of a hybrid ZnWO4/carbon core/ shell structure (inset of ... Representative TEM images of C-ZW nanorods (a, b) Low and high magnifications (c) TEM image of an individual C-ZW nanorod Inset shows the schematic presentation of a ZnWO4/carbon core/ shell- structured ... modes caused by each of the six W-O bonds in the WO6 octahedrons In the case of Raman analysis, group theory analysis of wolframite-type ZnWO4 predicts 36 lattice modes, of which 18 even vibrations...

Ngày tải lên: 20/06/2014, 23:20

... of core/ shell ferrite nanoparticles Core/ shell ferrite nanoparticles coated with silica are found to enhance the optical properties of the magnetic nanoparticles Core/ shell zinc ferrite nanoparticles ... the optical properties enhancement of the prepared core/ shell ferrite samples When a beam of incident light impinges on the surface of these core/ shell nanoparticles, only a small fraction is ... with zinc ferrite nanoparticles coated with silica shell This is attributed to the effect of silica shell, which enhances the optical properties of core/ shell ferrite nanoparticles On the other...

Ngày tải lên: 21/06/2014, 01:20

... close inspection to the core- shell particles reveals that the core- shell composite particles are of spherical shape with nearly uniform size, although the size of these ZrO2 cores is not very uniform ... nanoparticles They are spherical in shape and the particle surface seems smooth with a diameter of ca 250 nm and a shell thickness of ca 25 nm An obvious contrast between the core and the shell of ... hybrid nanoparticles: a a full-scan XPS spectrum of the hybrid nanoparticles; b Zr3d signals for the nanoparticles; c deconvolution of O1s signal for the nanoparticles; and d deconvolution of C1s...

Ngày tải lên: 22/06/2014, 01:20

... Polymers of Core- Shell 3.3 124 Morphology of Core- Shell Styrene-Butyl Acrylate Polymers by TEM Figure shows the TEM of the core- shell polymer particles The image shows that polymers consist of spherical ... temperature of the initiator APS to form free radical sulfate ions RESULTS AND DISCUSSION 3.1 Emulsion Polymerization of Core- Shell Styrene-Butyl Acrylate with Varying of Feed Time Synthesis of core- shell ... for the formation of the core styrene and the second is for grafting butyl acrylate to the styrene core to complete the shell (ratio of core- shell to feeding time) The results of the conversion...

Ngày tải lên: 07/08/2014, 14:20

... phase fabrication of hydrogel core- shell materials; 4) Characterization of fabricated core- shell materials 5) Encapsulation of macromolecular biomolecules within fabricated core- shell materials ... Fabrication of Core- Shell Materials 28 3.2.3 Specific Aim – Organic Phase Fabrication of Hydrogel Core- Shell Materials 28 3.2.4 Specific Aim – Characterization of Fabricated Core- Shell Materials ... Reproduced by permission of The Royal Society of Chemistry) Cayre et al (2004) described the fabrication of colloidosomes with an agarose core and an integral shell of polystyrene (PS) latex beads (Figure...

Ngày tải lên: 11/09/2015, 10:15

... 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 ... formation mechanism of the core/ shell structure of SiNWs wrapped highly dispersed Au nanoparticles, we explain as followed: under the ultrasonication, some AuClÀ anions in the solution of HAuCl4 are ... °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

... peripheries of the nanowire, which leads to the coaxial core- shell structure TEM observation of several tens of such nanowires reveal that the diameter of the core and the thickness of the shell are ... 550 and 600 nm, as indicated in Fig 5a Each nanowire consists of a crystalline Si core and an amorphous SiOx shell The core and shell both can make contributions to the luminescence, as mentioned ... Conclusions Core- shell Si/SiOx nanowires were prepared by a thermal evaporation of MoSi2 rods in the presence of oxidizing agents under controlled temperature and atmosphere Two major forms of silicon...

Ngày tải lên: 16/03/2014, 15:08

... thickness of the shell, we can obtain various Si -core/ Ge -shell and Ge -core/ Si -shell nanowires For a given core shell nanowire, the composition, N core =ðN core þ N shell Þ, where the N core and N shell ... with a shell shell limitation of ðRcore þ T shell ¼ Rcore 2shell Þ Tables and list the structural features of the core shell nanowires we considered As listed in Tables and 2, 20 core shell nanowires ... number of atoms of core shell nanowires are fixed to be 2524 The ˚ unit of the length is in a Table The optimal structural parameters of Si -core/ Ge -shell nanowires Radius of core Outer radius of shell...

Ngày tải lên: 16/03/2014, 15:22

... the shell to be formed without growing the core significantly or nucleating separate particles of the shell material 2.4.4 CdSe-ZnS Core- Shell System The CdSe-ZnS core- shell system was one of ... alignment of different core- shell systems The first and most common core- shell system is type-I in which a higher bandgap semiconductor shell is formed on the core, confining the exciton to the core ... When forming a shell on a core particle, the shell will tend to take the crystal structure of the core to minimize lattice mismatch if the shell can form the crystal structure of the core material...

Ngày tải lên: 15/05/2014, 10:25

... nature of BeO shell, which is composed of many island-shape grains with random orientations to the ZnO core Accordingly, a rather rough edge of the BeO shell is observed Magnified image of region ... suppressed in the core/ shell sample, indicating the BeO capping process significantly reduces the surface states of ZnO core The drastic increase in the NBE emission intensities of ZnO in core/ shell sample ... 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 energy than that of ZnO [32] In such case, a potential...

Ngày tải lên: 21/06/2014, 00:20

... structure of CdTe Figure 1d illustrates a typical CdTe/CdSe core/ shell QD from different contrasts corresponding to a CdTe core and CdSe shell, respectively The thickness of a CdSe shell is about ... 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 cores and ... increase of shell thickness Under the UV-illuminated treatment, the PLQY of the core/ shell QDs was enhanced to 45% in the presence of Cd2+ and 3-mercaptopropionic acid The lifetime of the CdTe/CdSe...

Ngày tải lên: 21/06/2014, 03:20

... silica particles with core diameter of 2530 nm and shell thickness of nm Nanoparticles of Page of a b Amorphous silica shell (111) Mn2O3 Figure TEM and HRTEM image (a) TEM and (b) HRTEM images of ... Mn2O3@SiO2 core- shell nanostructures Mn2O3@vinyl-functionalized silica (Figure 2b) show coreshell nanostructures with a core diameter of 25-30 nm and shell thickness of 5-10 nm Cores with diameter of ... [25] The above applications of modified silica particles motivated us to synthesize core- shell nanostructures of Mn2O nanoparticles (core) with functionalized silica shell Silica-coated Mn2O3 (not...

Ngày tải lên: 21/06/2014, 05:20

... photoluminescence spectra of the PbSe/CdSe QDs upon the series growth of three monolayers of CdSe shells on the 4.8 nm PbSe cores The thickness of each shell is 0.35 nm A consistent red shift of the peak wavelength ... by surface defects depend on the shell growth Compared with the photoluminescence of one monolayer core/ shell QDs, the photoluminescence of two monolayers core/ shell QDs increased as shown in ... during CdSe shell growth A consistent red shift of the peak wavelength (11, 10, 11 nm) was observed when one to three monolayers of CdSe shells grown on 4.8 nm PbSe cores the thickness of energy...

Ngày tải lên: 21/06/2014, 17:20

... than that of the others In the case of the core/ shell S35 nanoparticles, a better EM match is set up due to the existence of the protective amorphous shells and its particular core/ shell microstructures, ... intrinsically core/ shell LSMO nanoparticles are a consequence of the better EM matching due to the existence of the protective amorphous shells, the ferromagnetic cores, as well as the particular core/ shell ... saturation magnetization of S35 nanoparticles is relatively lower, the special intrinsically core/ shell microstructure of the nanoparticles with amorphous shell and ferromagnetic core is the vital factor...

Ngày tải lên: 21/06/2014, 20:20

... literature in the context of core shell structure formation in solution [3, 11] and the increase is expected from the relation [13]   Vshell Cshell 1=3 Dcore @shell ¼ Dcore þ Vcore Ccore ð1Þ where V ... formation of Au–Pt core shell NPs on the solid surface and are particularly significant since the core and the shell are generated in situ unlike the previous reports in solution where core particles ... several earlier reports of Au–Pt NP formation in solution [3, 5, 10, 25–27] substantiate that the deposition of a Pt shell on top of an Au core is responsible for the disappearance of the Au surface...

Ngày tải lên: 22/06/2014, 00:20

... Ni-filled Co nanotubes (Ni @ Co nanorods) of length 15 lm and of diameter *150 nm The formation of a core shell nanostructure with Co NT as shell and Ni NW as core is abundantly clear from the TEM ... analysis of these nanorods has been carried out using EDS and is shown in Fig Fig a TEM image of Co NT, b TEM image of Ni NW (inset: ED of Ni NW), c FESEM image of Ni @ Co nanorods, and d TEM image of ... veracity of mobility-assisted growth mechanism inside MWCNTs and could fabricate co-axial multifunctional nanostructures of MWCNTs and Co NTs [20] Core Shell nanostructures represent a novel class of...

Ngày tải lên: 22/06/2014, 00:20

... a shell of ZnS not only can decrease the toxicity of cadmium but also can increase the quantum yield [21], forming a core/ shell or core/ shell/ shell structure with CdTe cores inside and ZnS shells ... Fluorescence spectra of different kinds of core/ shell QDs and S precursor in the second part can form a shell of ZnS on the outside of CdTe/CdS QDs The core/ shell/ shell structure was further confirmed ... epitaxially grow ZnS shells on CdTe cores A shell of CdS between CdTe and ZnS can work as a transition shell because the band gap and lattice contact of CdS is just between that of CdTe and ZnS Using...

Ngày tải lên: 22/06/2014, 00:20

... of the marked region in Fig 3c, from which we can see the shell is made up of ZnS nanoparticles of *4 nm diameter growing along 123 Fig SEM images (a) of CdS nanowires and (b) of 1D CdS@ZnS core- shell ... up to several tens of micrometers were coated with a uniform layer of ZnS shell This shell was composed of ZnS nanoparticles with a diameter of ca nm, anchoring on the surface of CdS nanowires ... the diameter of the core- shell nanowires had increased to be about *60 nm while the thickness of the shell layer was calculated to be * 10 nm After the shell growth, the surface of the nanowires...

Ngày tải lên: 22/06/2014, 01:20

... The Fig TEM images of (a) Nb2O5@C core- shell nanorods, (b) a HRTEM image of the edge of a Nb2O5@C core- shell nanorod with the plane (180) A uniform amorphous carbon coating of 5–10 nm thickness ... Nb2O5@C core- shell nanoparticles (b) SEM images of neat Nb2O5 nanorods obtained after annealing the Nb2O5@C coreshell nanorods at 500 °C under air for h The dashed arrow points to stackings of nanorods ... flakes of different shapes as well defined, rod-shaped particles The average thickness of the various flakes is ~100 nm Elemental analysis measurements of the NOC core shell revealed the presence of...

Ngày tải lên: 22/06/2014, 22:20

... study of the kinetics of polymerisation of the styrene core and butyl acrylate shell formation experimentally and estimates of the emulsion polymerisation mechanism of synthesis for the obtained core ... measurements of the shell butyl acrylate shell, the range of concentrations of butyl acrylate was 9.9%–12.6%, that of SLS was 0.1–0.4 CMC, and that of APS was 0.01%–0.04% 2.3 Determination of Solid ... formation of the styrene core 3.4 Mechanism of Reaction in the Formation of the Styrene Core The order of the styrene monomer obtained in the experiment is 1.2  1, therefore the reaction mechanism of...

Ngày tải lên: 07/08/2014, 14:20