Transient absorption spectroscopy of noble metal nanoparticles

... University on the study of nonlinear optical properties of metal nanoparticles This thesis entitled: Transient absorption spectroscopy of noble metal nanoparticles is my own work and has not been submitted ... electronic dynamics of metal nanoparticles With the theoretical and experimental studies, we hope you will understand the transient absorption spectroscop...

Ngày tải lên: 08/09/2015, 19:44

... optical properties of noble metal nanoparticles and two- photon photoluminescence, the aggregation of noble 32 metal nanoparticles induced enhanced two- photon photoluminescence and their applications ... photoluminescence of noble metal nanoparticles Firstly, two- photon excited photoluminescence and two- photon induced singlet oxyge...

Ngày tải lên: 10/09/2015, 09:02

... control of all of them; The synthesis of Ag@AgAu metal core alloy shell nanoparticles with tunable shell composition This type of bimetallic nanoparticles was formed by carefully controlling the synthesis ... discussion of the size-sorting of nanoparticles formed by conventional colloidal synthesis methods 2.1 Fundamentals of formation of monodisperse nanopart...

Ngày tải lên: 11/09/2015, 09:01

... appropriate conjugated polymeric shell Conclusions A versatile and facile synthesis of core shell systems based on noble metal nanoparticles (AuNPs, AgNPs, PtNPs), coated by polymers and copolymers belonging ... applications such as biolabelling and drug delivery In this paper, the synthesis and characterization of core shell systems based on noble met...

Ngày tải lên: 21/06/2014, 06:20

... involvement of zinc in homocysteine activation Biochemistry 36, 1574915757 22 Harms, U & Thauer, R.K (1996) Methylcobalamin :coenzyme M methyltransferase isoenzymes MtaA and MtbA from Methanosarcina barkeri ... Specic roles of methylcobamide :coenzyme M methyltransferase isozymes in metabolism of methanol and methylamines in Methanosarcina barkeri J Biol Chem...

Ngày tải lên: 17/03/2014, 23:20

... strong interaction of carriers with the lattice [14] 1951 Conclusion We reported here the DLTS and LDLTS studies of MQWs samples grown by MBE on (100) and (311)B GaAs substrates The activation ... velocity of the electron, Nc is the effective density of states in the conduction band, and kB is the Boltzmann’s constant The dependence of the emission rate signature...

Ngày tải lên: 21/06/2014, 08:20

... excellent microwave absorption properties originating from the intrinsically core/shell structured nanoparticles are not reported as far as we know In our present work, we investigate the microwave absorption ... characteristics of the nanocrystalline perovskite manganite indicate that it has high application as microwave absorption materials Though several works have re...

Ngày tải lên: 21/06/2014, 20:20

... small amount of Ni grains with diameter of about 30 nm in some regions of the film (see Fig 4b) Raman Spectroscopy The Raman spectroscopy data of the samples were first analysed using the Tuinstra–Koenig ... typical Raman spectroscopy plots are presented in Figs 5–7 for vibrational properties of carbon in SiO2, ZnO and NiO, respectively No significant asymmet...

Ngày tải lên: 22/06/2014, 01:20

... measured on the contact of mercury with Si wafer before (empty circles) and after (filled circles) deposition of Pd nanoparticles Fig SEM image of Pd nanoparticles layer formed by electrophoresis on ... electrophoresis, deposition of conductive layers of Pd nanoparticles has been achieved Then we followed with the depositions on polished InP substrates A SEM im...

Ngày tải lên: 22/06/2014, 18:20

... directed towards understanding the kinetics of elementary gas- phase reactions of small molecules using Fourier- Transformed Infrared (FTIR) absorption techniques The small molecules investigated ... Introduction 1.1 Gas phase kinetics The study of elementary gas- phase reaction kinetics, a venerable area of chemical investigation, continues to play a pro...

Ngày tải lên: 15/09/2015, 17:11

... intensity the lower the rate of methane oxidation Tentative regeneration of the catalyst in hydrogen led to the decomposition of sulphate species at temperatures as low as 350 ◦ C But, the catalytic ... reaction temperature in the range 0.8 ± 0.2 The influence of water concentration on the rate of oxidation of methane over Pd/Al2 O3 was also investigated by Burch e...

Ngày tải lên: 08/10/2015, 22:56

... absorption, calculation of the absorption and scattering cross sections of the Au nanoparticles, comparison of nanoparticles in solution with those adsorbed onto an electrode, Au nanoparticles deposited ... of the Au nanoparticles used for the embedded configuration before Fe2O3 deposition; (a2) size distribution of the particles used for the embedded configuration; (b1)...

Ngày tải lên: 18/09/2013, 21:26

... absorption were analyzed/tested in the laboratory of Construction material, Hanoi University of Construction The environmental safety of sludge re-usage was assessed based on heavy metals leaching ... ratio origin material (%) In further study, heavy metal leaching into rain water with lower pH value and longer soaking time should be investigated; the use of mi...

Ngày tải lên: 12/02/2014, 17:20

... composition of the Fe-Pt nanoparticles was controlled by adjusting the current density (corresponding to the applied voltage) When the current density of 15 – 20 mA/cm2, the composition of nanoparticles ... [21] The broad peak on the DSC trace in the FePt nanoparticles suggests that there was no such transition in the FePt nanoparticles upon annealing Th...

Ngày tải lên: 13/02/2014, 03:20

... obtained by subtracting the control titration data in the absence of the enzymes from the titration data in the presence of the enzymes The results of the equilibrium binding studies showed that, ... by kinetics in the early part of the reaction course and by thermodynamics in the late part of the reaction course, and therefore the epimerization...

Ngày tải lên: 19/02/2014, 00:20