au ag pt nanoparticles assisted by plant extracts

Tài liệu Báo cáo "Effect of the preparation conditions on the properties of Fe-Pt nanoparticles produced by sonoelectrodeposition " pptx

Ngày tải lên : 13/02/2014, 03:20

... nanoparticles compared to those of the intensities for L10 FePt (pdf file 431359) and for Pt (marked by the astericks, pdf file 04-0802) The fundamental peaks of FePt structure were denoted by ... main peak of the L10 FePt which can be assigned to the Pt- rich FePt phase – FePt3 The presence of this phase can be explained by the incomplete diffusion between Fe and Pt domains 500 M (emu/g) ... magnetic squareness Mr/Ms reduced with J because of the presence of the Fe 3Pt Of cause, the kink in the magnetic curves was more evident in the samples with high Fe content ton = 0.5 s 1.0 Magnetic...

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Preparation of au ag alloy nanoparticles for surface enhanced raman scattering

Ngày tải lên : 24/10/2016, 15:21

... substrate without Au- Ag alloy NPs (R6G/Cu sample); R6G on Cu substrate with mixture of Au and Ag NPs (R6G /Au/ Ag/ Cu sample) and R6G on Cu substrate with Au- Ag alloy NPs (R6G /Au- Ag alloy NPs/Cu sample) ... Nd:YAG to form Au- Ag alloy NPs By this method one can not need Au- Ag bulk alloys with different compositions that are expensive Moreover, by the laser based method one can prepare Au- Ag alloy NPs ... patterns of Au NPs show peaks as Ag- NPs, this is due to close lattice constants of Au and Ag (namely, Au: 4.0786 Å and Ag: 4.0862 Å) The TEM image and size distribution (Fig.5) show Au- NPs are...

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Báo cáo hóa học: "Localized-Surface-Plasmon Enhanced the 357 nm Forward Emission from ZnMgO Films Capped by Pt Nanoparticles" ppt

Ngày tải lên : 21/06/2014, 20:20

... surface by sputtering deposition of Pt thin ﬁlms followed by annealing Annealing was performed by rapid thermal annealing (RTA) in N2 ambient at 800 °C for The sizes of Pt NPs were controlled by varying ... Res Lett (2009) 4:1121–1125 capped by Ag NPs is also given in Fig Here, the Ag NPs with the similar morphology as the Pt NPs were prepared by annealing a nm Ag layer deposited on a reference ZnMgO ... simple multi-scattering of light that occurred at the Ag/ ZnMgO interface Because of the similar morphology between the Ag and Pt NPs, for the Pt- capped ZnMgO ﬁlm an emission enhancement resulting...

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Báo cáo hóa học: " Laser-Induced, Polarization Dependent Shape Transformation of Au/Ag Nanoparticles in Glass" docx

Ngày tải lên : 22/06/2014, 00:20

... Fig Optical micrographs of the Au/ Ag nanoparticles containing glass after laser irradiation recorded using a non-polarized, and b, c polarized light, respectively 1.0 original particles Optical ... temperature By this sequential high-dose ion implantation of Ag? and Au? , metal particles have been formed in a surface-near region of the soda-lime silicate glass The dose of implanted ions ... sample in the described way with average single pulse energy of 20 lJ is shown in Figs (microscope images) and (optical absorption spectra) The lines prepared by high intensity fs laser irradiation...

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Báo cáo hóa học: " Fabrication of Carbon Nanotube/SiO2 and Carbon Nanotube/ SiO2/Ag Nanoparticles Hybrids by Using Plasma Treatment" pptx

Ngày tải lên : 22/06/2014, 00:20

... (SWCNT@SiO2) and Ag nanoparticles immobilized SWCNT@SiO2 (SWCNT@SiO2 /Ag nanoparticles) based on the plasma-treated SWCNTs TEOS and MPTO in scheme are tetraethoxysilane and 3-mercaptopropyl-triethoxysilane, ... functionalized with thiol groups by using suitable amount of 3-mercaptopropyl-triethoxysilane (MPTO) as co-condensation agent together with TEOS Subsequently, the silver nanoparticles (Ag NPs) can be further ... SWCNT@SiO2 /Ag hybrids The Direct evidence for the formation of Ag nanoparticles on the SiO2 surface is obtained from TEM observation Figure 3c, d shows the surfaces of SWCNT@SiO2 are decorated with Ag nanoparticles...

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Tài liệu Câu hỏi trắc nghiệm phần kim loại Au, Ag luyện thi ppt

Ngày tải lên : 24/12/2013, 18:15

... Eo (Au+ /Au) = 1,7V Hi n tư ng c gi i thích là: A AuCl b n C AuCl3 d b oxi hóa D A, B u úng B do: 3AuCl → AuCl3 + Au Câu 71: Nh ng kim lo i không b hòa tan dd HNO3 là: A Au, Pt B Au, Cr C Au, ... Cu, Ag, Fe, Al, Zn C Al, Fe, Zn, Cu, Ag B Ag, Cu, Al, Zn, Fe D Al, Zn, Fe, Cu, Ag Câu 24: Có kim lo i: Cu, Ag, Fe, Al, Au d n i n c a chúng gi m d n theo th t : A Ag, Cu, Au, Al, Fe C Au, Ag, ... Cu(NO3)2 AgNO3 Thành ph n % kh i lư ng c a h p kim là: A 60% Cu 40% Ag C 64% Cu 36% Ag B 36% Cu 64% Ag D 50% Cu 50% Ag Câu 49: Tinh th dùng ngưng t nư c, t o mưa là: A AgBr B AgI C AgF D AgCl Câu...

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Tài liệu Câu hỏi trắc nghiệm phần kim loại Au - Ag pptx

Ngày tải lên : 25/01/2014, 20:20

... Eo (Au+ /Au) = 1,7V Hi n tư ng c gi i thích là: A AuCl b n C AuCl3 d b oxi hóa D A, B u úng B do: 3AuCl → AuCl3 + Au Câu 71: Nh ng kim lo i không b hòa tan dd HNO3 là: A Au, Pt B Au, Cr C Au, ... Cu, Ag, Fe, Al, Zn C Al, Fe, Zn, Cu, Ag B Ag, Cu, Al, Zn, Fe D Al, Zn, Fe, Cu, Ag Câu 24: Có kim lo i: Cu, Ag, Fe, Al, Au d n i n c a chúng gi m d n theo th t : A Ag, Cu, Au, Al, Fe C Au, Ag, ... Cu(NO3)2 AgNO3 Thành ph n % kh i lư ng c a h p kim là: A 60% Cu 40% Ag C 64% Cu 36% Ag B 36% Cu 64% Ag D 50% Cu 50% Ag Câu 49: Tinh th dùng ngưng t nư c, t o mưa là: A AgBr B AgI C AgF D AgCl Câu...

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Effects of ph on cd and zn uptake by plant

Ngày tải lên : 16/03/2014, 00:07

... largely due to the natural variation in metal uptake by the midge larvae Also in other studies on cadmium uptake by midge larvae, a high variation in metal uptake within a treatment was observed (Seidman ... the uptake of the metals by the larvae Fig shows the results of the effect of the pH of exposure on Cd uptake in the different acclimation groups Within each acclimation group cadmium uptake ... regression analysis for cadmium uptake by midge larvae Relating cadmium uptake to the free cadmium ion activity describes only 6% of the total variation in cadmium uptake When the term was added...

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Báo cáo " Silver nanoparticles prepared by laser ablation and their optical characteristics " pptx

Ngày tải lên : 22/03/2014, 11:20

... silver nanoparticles obtained by a transmission electron microscope (TEM) was shown in Fig The spherical shape of the nanoparticles observed by TEM is consistent with the optical absorption peak ... prepared by laser ablation (a) and by chemical reduction (b) Fig Absorption spectra of silver nanoparticles produced by laser ablation in a 0.003, 0.01 and 0.1M solution of PVA The silver nanoparticles ... particles produced by chemical reduction shifted to 440 nm as compared to 400 nm by laser ablation The peak width of silver nanoparticles by laser ablation is narrower than that by chemical reduction...

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analysis of cuo nanoparticles synthesized by sol gel

Ngày tải lên : 06/05/2014, 08:55

... Microstructure and Optical Absorption Analysis of CuO Nanoparticles Synthesized by Sol-Gel Route served XRD pattern Our XRD results thus confirm synthesis of pure and well crystalline CuO nanoparticles ... effects on the magnetic and optical properties of CuO nanoparticles , J Nanopart Res 13, 2497 (2011) [18] A Sawaby, M.S Selim, S.Y Marzouk, M.A Mostafa and A Hosny, “Structure, optical and electrochromic ... 291, 196 (2006) 74 P Mallick et al.: Structure, Microstructure and Optical Absorption Analysis of CuO Nanoparticles Synthesized by Sol-Gel Route [12] W Wang, Y Zhan and G Wang, “One-step, solid-state...

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analysis of cuo nanoparticles synthesized by sol gel

Ngày tải lên : 06/05/2014, 08:59

... Microstructure and Optical Absorption Analysis of CuO Nanoparticles Synthesized by Sol-Gel Route served XRD pattern Our XRD results thus confirm synthesis of pure and well crystalline CuO nanoparticles ... effects on the magnetic and optical properties of CuO nanoparticles , J Nanopart Res 13, 2497 (2011) [18] A Sawaby, M.S Selim, S.Y Marzouk, M.A Mostafa and A Hosny, “Structure, optical and electrochromic ... 291, 196 (2006) 74 P Mallick et al.: Structure, Microstructure and Optical Absorption Analysis of CuO Nanoparticles Synthesized by Sol-Gel Route [12] W Wang, Y Zhan and G Wang, “One-step, solid-state...

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synthesis and optical properties of au-ag alloy nanoclusters with controlled composition, p26

Ngày tải lên : 04/06/2014, 15:20

... 1/1 and 3/1 respectively) a counts (a.u.) Au/ Ag = 1.05 Au O Ag Cu Cu Au Au Au 10 12 14 Energy (keV) O Au b Counts (a u.) Au/ Ag = 3.02 Cu Cu Ag Au Au Au 10 12 14 Energy (keV) Figure EDS spectra ... bimetallic nanoparticles Figure shows the typical HAADF images of our bimetallic nanoparticles prepared with Au/ Ag = 1/1 and Au/ Ag = 1/3 compositions We can perceive only a homogeneous image contrast ... ) for bimetallic systems AuxAg(1-x) can be defined by considering the weighted average for each component: ε av ( Au x Ag (1− x ) ) = ε av ( x, ω ) = xε ( Au ) + xε ( Ag ) (5), where x is the...

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báo cáo hóa học: " Defined plant extracts can protect human cells against combined xenobiotic effects" ppt

Ngày tải lên : 20/06/2014, 00:20

... dehydrogenase activity in cells was measured by the MTT test, based on the cleavage of MTT into blue formazan [30,31], adapted in our group by Auvray et al [32] The optical density was measured using a ... We also made this assumption because the plant extracts did not have any cytotoxicity by themselves in our conditions A major extracellular trapping was almost excluded by the fact that a labelled ... curative effects reached 28% for Dig after HepG2 intoxication by BPA-Az Therefore, it seems that oxidative damage protection by plant extracts cannot explain all the effects Moreover, with R tested...

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Báo cáo hóa học: "Nearly Monodispersion CoSm Alloy Nanoparticles Formed by an In-situ Rapid Cooling and Passivating Microﬂuidic Process" docx

Ngày tải lên : 21/06/2014, 20:20

... nanoparticle synthesis The microﬂuidic reactor, fabricated by UV-LIGA process and sealed by semi-solid sealing process, is shown as the optical image in the center of the ﬁgure The reactor consists ... Fig The SEM image of the cross section of the channels Based on the image, the channel width and depth were determined to be 60lm and 600 lm, respectively, suggesting a high depth/width ratio ... amorphous CoSm nanoparticles show a wasp-waist hysteresis loop at 10 K with an average coercivity of 225 Oe (right-bottom inserted image) and a Hc of Oe at 300 K (a); the FC and ZFC magnetization...

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Báo cáo hóa học: " Magnetic and Cytotoxicity Properties of La12xSrxMnO3 (0 £ x £ 0.5) Nanoparticles Prepared by a Simple " pptx

Ngày tải lên : 22/06/2014, 00:20

... La0.7Sr0.3MnO3 nanoparticles (*30 nm) synthesized by citrate-gel route reported by Rajagopal et al [12], and higher than the value of 23 emu/g for La0.7Sr0.3MnO3 nanoparticles (*48 nm) synthesized by sol–gel ... stabilize the oxide phase at lower temperature This phenomenon agrees with the one found by Gaudon et al [4] for LSMO prepared by sol–gel method, while for the samples with x [ 0.3, the substitution ... structure transformation occurs at 900 °C in most samples except for x [ 0.3 These results are in good agreement with the work reported by Gaudon et al [4] The substitution of divalent cation Sr2?...

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Báo cáo hóa học: " High Methanol Oxidation Activity of Well-Dispersed Pt Nanoparticles on Carbon Nanotubes Using Nitrogen Doping" docx

Ngày tải lên : 22/06/2014, 00:20

... in Fig 4a, Pt NPs are uniformly distributed on the sidewalls of N-doped CNTs By contrast, those Pt NPs agglomerate on the surface of undoped CNTs in Fig 4b From the SEM images of Pt NPs on N-doped ... chamber during CNTs growth For Pt deposition, DC sputtering under Ar gas ﬂow was performed Pt 4p N 1s Pt 4d C 1s 800 600 400 200 Binding energy (eV) Fig Surface scan of Pt NPs immobilized on N-doped ... degree of dispersion for Pt NPs on CNTs is substantially reduced; therefore, the Pt NPs will agglomerate as shown in Fig 5b It provides the important information that Pt NPs are uniformly dispersed...

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Báo cáo hóa học: " High Activity of Hexagonal Ag/Pt Nanoshell Catalyst for Oxygen Electroreduction" pptx

Ngày tải lên : 22/06/2014, 01:20

... prepared hexagonal Ag/ Pt nanoshells, Ag/ Pt nanoparticles, and Pt nanoparticles were used as electrocatalysts In contrast to the spherical Pt and Ag/ Pt nanocatalysts, the hexagonal Ag/ Pt nanoshells ... -15 -20 0.4 0.5 0.6 0.7 0.8 0.9 Voltage (V) vs Ag/ AgCl Fig The comparative LSV curves of the hexagonal Ag/ Pt nanoshells, spherical Ag/ Pt nanoparticles and Pt nanoparticles for electroreducing oxygen ... (220), and (311) peaks in the Pt standard XRD Nanoscale Res Lett (2009) 4:193–196 195 (A) Current density (mA/cm ) -5 Pt nanoparticles Ag- Pt nanoparticles Hexagonal Ag- Pt nanoshells -10 -15 -20 0.4...

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Báo cáo y học: "Reduction of urate crystal-induced inflammation by root extracts from traditional oriental medicinal plants: elevation of prostaglandin D2 levels" pps

Ngày tải lên : 09/08/2014, 10:20

... forward 5'TGCAGTGGCAAAGTGGAGATT3' GAPDH reverse 5'ATTTGCCGTGAGTGGAGTCAT3' IL-6 forward 5'GGAGAGGAGACTTCACAG3' IL-6 reverse 5'GCCATTGCACAACTCTTTTC3' TNF-α forward 5'CATCTTCTCAAAATTCGAGTGACAA3' TNF-α ... forward 5'CATCTTCTCAAAATTCGAGTGACAA3' TNF-α reverse 5'TGGGAGTAGACAAGGTACAACCC3' Table Authentication of the extracts by HPLC h-PGDS forward 5'ATCCAAGGCTGGTGACTTTACG3' h-PGDS reverse Botanical source ... (gavage feeding with water and intrapouch injection of PBS); (2) MSU (gavage feeding with water and intrapouch injection of MSU crystals in PBS); and (3) MSU + extracts (gavage feeding with extracts...

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báo cáo khoa học: "Size-dependent endocytosis of gold nanoparticles studied by three-dimensional mapping of plasmonic scattering images" docx

Ngày tải lên : 11/08/2014, 00:22

... the AuNPs are in aggregated form [9] Because the limited spatial resolution of the optical microscopy, the number of AuNPs in each aggregate cannot be simply identified by the optical images ... http://www.jnanobiotechnology.com/content/8/1/33 Page of 13 Figure The 3D images of the distribution of AuNPs (a) The calculated 3D image for 45-nm-AuNP aggregates distribution on a HeLa cell (b) The calculated 3D image for 70-nm-AuNP aggregates ... Fabrication of AuNPs AuNPs were prepared by using the reduction of chloroauric acid (H[AuCl4]) solution [16,17] Different diameters of AuNPs were made by using different ratios of chloroauric acid...

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Báo cáo khoa học: "Inhibition of lentivirus replication by aqueous extracts of Prunella vulgaris" pdf

Ngày tải lên : 12/08/2014, 04:21

... the presence of the extracts divided by the DMSO control Shown are the averages and standard errors of three experiments performed in triplicate **, p < 0.001 Page of 13 (page number not for citation ... calculated by subtracting the infectivity in the presence of the extracts from the DMSO control at each time point Data from the extracts 27666 and 27748 were averaged nd, data not determined Page of ... Prunella extracts inhibit EIAV infectivity primarily by acting on Prunella extracts inhibit EIAV infectivity primarily by acting on viral particles A) Ability of cell-associated Prunella extracts...

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