the kirkendall effect and fabrication of core shell nanoparticles

... the open-square regions in Figure 4c The surface of the core ZnWO4 was very clear and clean, and the magnified view shows the highly crystalline structure of the ZnWO4 [19,20] In Figure 4e, the ... resulted in the formation of a hybrid ZnWO4/carbon core/ shell structure (inset of Figure 4c) The uniform thickness of carbon was approximately nm, based on the HRTEM images (Figures 4d, e) of the individual ... terms of D and G bands These peaks are in good correspondence with the Raman spectra of the amorphous carbon reported in the literature [16-18] The TEM observation more clearly demonstrated the...

Ngày tải lên: 20/06/2014, 23:20

... stimuli is then removed which subsequently reduces the permeability of the LbL shells and thereby locks the biomolecules within the core of hollow microcapsules On the other hand, the LbL shells ... Encapsulation The second approach for the encapsulation of biomolecules into core- shell microcapsules involves the pre-loading of biomolecules within the core template during the fabrication of the core ... surfaces of these microparticles and the internal walls of the pores These biomolecules loaded microparticles are then subjected to polymer deposition via the LbL technique for the fabrication of core- shell...

Ngày tải lên: 11/09/2015, 10:15

... nanocomposites, and their thermal stability need to be further understood Therefore, the development of facile and effective approaches to obtain the desired hybrid ZrO2 nanocomposites and further understanding ... hybrid 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 ... the shell of the latex particles could be observed in Fig 1, which is possibly caused by the difference of electron penetrability to the inorganic core and the organic shell Furthermore, the inorganic...

Ngày tải lên: 22/06/2014, 01:20

... where the first is 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 structure must consist of a hard core and a soft shell Hard core forms the crystalline lattice while the soft shell forms a matrix around them There is no free space between the spheres The ... results of the conversion and particle size to the ratio of the feeding time are given in Table Table shows that as the feeding time of the core and shell increases, so does conversion and the results...

Ngày tải lên: 07/08/2014, 14:20

... show the formation process of array of microboats of Cu on glass substrate The wall thickness of microboats is dependent on the thickness of the deposited film, while the height is dependent on the ... http://www.nanoscalereslett.com/content/6/1/86 Page of design of the study and discussion of growth mechanism of CuO nanowires NX participated in the design of the study, and critically revised the manuscript for important ... nanowires grew only in the inner surface of the microboats and microbowls Their diameters are 30-80 nm and length 0.5-4 μm The microstructure of the individual CuO nanowires was further examined using...

Ngày tải lên: 21/06/2014, 06:20

... the band VHF to understand the structure, the transmission characteristics in order to master the technology to go to complete the set and apply the product on the fact that the purpose end of ... output .The digital output signal of the encoder is the output of the first register in the counter .the digital output signal is transmitted at the clock(sample) rate and will equal”1” if the analog ... in the amplitude of the slopevoltage out of the syllabic filter .the encoder and decoder have identical characteristics except for the comparator and filter functions The CVSD decoder consists of...

Ngày tải lên: 27/05/2014, 20:57

... 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 hand, cobalt ... the optical properties 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 ... 62.99 ZFS 400 11.06 86 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...

Ngày tải lên: 21/06/2014, 01:20

... aspects of both the isochronal and isothermal studies and drafted the manuscript TR participated in all aspects of the isochronal study as well as the acquisition of XANES data in the isothermal ... smoothing filter to remove the effects of noise without distorting the shape of the spectra and locating the energy at which the peak PL intensity occurred There is a clear and steady shift from approximately ... electrons and fluorescence photons at the absorption edges probed Information on the bulk of the film was provided by the TEY spectra at the Si K-edge and the FLY spectra at the Si L3,2-edge Results and...

Ngày tải lên: 21/06/2014, 05:20

... insure they have a comprehensive understanding of the interpretation of responses during the chart-stimulated recall Their orientation will consist of training on the theory and methods of chart-stimulated ... within their practice and requires chart audits and observations Stage focuses on the client and requires evaluation of the efficiency, effectiveness, adequacy and appropriateness of care and its ... highlighted the need to better understand the mediators of knowledge transfer, and previous work has established that a variety of factors may influence the effects of KT [38,39] However, the mediators...

Ngày tải lên: 11/08/2014, 05:22

... conditions, and they had a very stable coreshell structure because of the rigid chemical structure of the core- forming segment cholesterol The TEM scans of the micelles also evidenced the formation of the ... that the microenvironment of pyrene was more hydrophobic after DNA binding DNA molecules bound on the surface of nanoparticles enhanced the stability of core- shell structure On the other hand, the ... The presence of proteins in the blood affected the stability of the micelles An increased protein concentration yielded greater size of the micelles because of the adsorption of proteins on the...

Ngày tải lên: 16/09/2015, 15:54

... after adsorption of proteins in the blood since the interactions between the shell and the proteins may damage the balance between the core and the shell The dissociation of the micelles may ... could interact with the positive charges on the surface of the micelles Therefore, the higher was the concentration of the salts, the larger the particle size The shielding of the positive charges ... observation) In the presence of PTA, the nanoparticles tended to aggregate The size of the nanoparticles was about 80 nm to 100 nm In the absence of PTA, no aggregates were found and the size of the micelles...

Ngày tải lên: 16/09/2015, 15:54

... that at 690 nm The results were expressed as a percentage of the absorbance of the negative control IC50 (the concentration of the agent to inhibit the cell line growth by 50%) of the polymers ... well The plates were then returned to the incubator In the morning of the tests, the media in the wells were replaced with 150 µL of fresh media Each polymeric micelles solution (50 µL) was then ... excitation and emission bandwidths were set at 4.5 nm The ratios of the peak intensities at 338 nm and 333 nm (I338/I333) from the excitation spectra and I3 (the third peak at 385nm)/I1 (the first...

Ngày tải lên: 16/09/2015, 15:54

... environments Therefore, by studying the fluorescent change of these compounds, one can know the polarity and hence the hydrophobicity of the core 1H-NMR can also provide some information about the core- shell ... perform their carrier function The kinetic stability depends on many factors including the physical state of the micelle core, the contents of a solvent inside the core, the size of the hydrophobic ... interact and associate to form the core of micelles while the hydrophilic segments arrange towards the aqueous phase to form the shell In the case of the oil-in-water emulsion method, a drug and a...

Ngày tải lên: 16/09/2015, 15:54

... ability of the blank and drug-loaded core- shell nanoparticles, and structural integrity of core- shell nanoparticles during the DNA binding process, • Testing cytotoxicity of the core- shell nanoparticles ... nanoparticles and examining their in vitro and in vivo gene transfection efficiency, • Investigating the effect of core- shell structure on the gene transfection efficiency of the nanoparticles, ... synergistic effect of drug and gene therapies, both the drug and gene have to be delivered to the same cell type Therefore, there is a great need to develop a delivery system that can carry both the...

Ngày tải lên: 16/09/2015, 15:54

... C p and C f are the concentrations of the permeate and feed, respectively 30 The exploration and fabrication of nanofiltration membranes 3.6 Characterization of membranes The morphologies of CA, ... 15 The exploration and fabrication of nanofiltration membranes involved in the selectivity filter of the channel and are responsible for the sieving of water molecules by size restriction The ... radius (r) of a hypothetical solute at a given Mw can be calculated The mean effective pore size and the pore size distribution were then obtained 31 The exploration and fabrication of nanofiltration...

Ngày tải lên: 12/10/2015, 17:35

... Γ(t) and ξ(t) include the complex reflection coefficient of the surface, the antenna gain in the direction of the reflected path, and path attenuation The time dependence of Γ(t) and ξ(t) is due to the ... for the sharp peak in the Laplacian angular distribution The location of the line of sight and the back wall reflection is very dependent on the specific arrangement of transmitter and receiver, and ... line of sight environment with a high signal to noise ratio and no reflections in the vicinity of the direct path Along the angular axis, the main lobe and side lobes of the antenna are visible, and...

Ngày tải lên: 20/11/2012, 11:32

... behavior of the fluid inside the system, but also by the deflection shape of the membrane [4] The displacement of the membrane is due to the shear stress applied by the actuator and by the pressure of ... When the temperature decreases and falls below Tc the structure changes The O2- and the Pb2+ ions are moved from their cubic positions and the Ti4+ and Zr4+ ions are moved from the center of the ... because of the elastic properties of the materials And the strain will affect the polarization since the polarization is caused by a displacement of the charge centers of the anions and cations...

Ngày tải lên: 10/04/2013, 13:48

... knowledge Is there a network? The existence of a network connecting the machines together raises additional problems and further increases the workload of the Systems Administrator Are the computers ... present and future The history of UNIX is an oft-told tale and it is sometimes hard to pick the correct version The story has been told many ways and the following is one version Being aware of the ... the appropriate policy a mechanism for the change of policy and penalties a mechanism for informing users of the policy and the penalties If any one of these necessary components is missing the...

Ngày tải lên: 19/10/2013, 02:20

... significant change in system profile Attack Metrics • Severity is defined by the criticality of the target and lethality of the attack, and the effectiveness of system and network countermeasures ... positives and false negatives, which are ever present factors in the life of an intrusion analyst We will then discuss the notion of Events of Interest (EOI), and their relevance to the event ... note that the attacker seemed to know what systems he was targeting because of the direct hit to the sunrpc port On the other hand, these are not servers, so let us assign a neutral value of to criticality...

Ngày tải lên: 04/11/2013, 13:15

... licentiate thesis of the present kind is reminiscent of the storybook form The aim is not to provide a synthesis; rather, it provides a multitude of pictures of processes and activities The present thesis ... aware of the reality-producing effects of describing the case In talking to representatives of the control group of the Public Internet Monitor Project, the case of the cleaner was seen as proof ... of studies have been conducted in Scandinavia from the ’70s onwards on technology and its relations to the work place and the development of working life from the point of view of democracy and...

Ngày tải lên: 04/11/2013, 20:15