SPECTROSCOPIC STUDIES OF SYNTHETIC AND
... sample was placed on a transparent supporting plate of synthetic high-quality single-crystal sapphire. Because the thermal conductivity of Al2O3 at low temperature is almost twice that of annealed pure copper (Volkov et al. 1981), it provides a very good thermal conductivity between the sample and s ...
... sample was placed on a transparent supporting plate of synthetic high-quality single-crystal sapphire. Because the thermal conductivity of Al2O3 at low temperature is almost twice that of annealed pure copper (Volkov et al. 1981), it provides a very good thermal conductivity between the sample and s ...
Scanning tunneling microscopy and spectroscopy
... exfoliation process[1, 2] by which graphene, a one-atom thick 2 dimensional (2D) crystal of Carbon atoms arranged in a honeycomb lattice [3-8], could be isolated from graphite. The isolation of graphene and the subsequent measurements which revealed its extraordinary electronic properties [9, 10] un ...
... exfoliation process[1, 2] by which graphene, a one-atom thick 2 dimensional (2D) crystal of Carbon atoms arranged in a honeycomb lattice [3-8], could be isolated from graphite. The isolation of graphene and the subsequent measurements which revealed its extraordinary electronic properties [9, 10] un ...
Scanning angle total internal reflection Raman spectroscopy and
... (Stokes) than the excitation source (Figure 1). Most of the incident light is scattered with no change in frequency (i.e. νR=ν0) and is known as Rayleigh scattering. Anti-Stokes Raman scattering is less intense than Stokes Raman scattering since the molecules must be in the first excited vibrational ...
... (Stokes) than the excitation source (Figure 1). Most of the incident light is scattered with no change in frequency (i.e. νR=ν0) and is known as Rayleigh scattering. Anti-Stokes Raman scattering is less intense than Stokes Raman scattering since the molecules must be in the first excited vibrational ...
- UCL Discovery
... contribute considerably to the mechanical stability of the FeS structure. From the geometry optimization of the low-Miller index surfaces of FeS, we have shown the (001) surface terminated by sulfur atoms is by far the most energetically stable surface of FeS. The calculated surface energies are us ...
... contribute considerably to the mechanical stability of the FeS structure. From the geometry optimization of the low-Miller index surfaces of FeS, we have shown the (001) surface terminated by sulfur atoms is by far the most energetically stable surface of FeS. The calculated surface energies are us ...
Adsorption and Reaction of SO2 with a Polycrystalline UO2 Film
... This displacement of the Fermi level from the top of the valence band to the bottom of the conduction band leads to a shift in the XPS spectra, since the Fermi level of the sample is aligned with that of the spectrometer. A similar binding energy shift of ∼1.4 eV in the O 1s spectrum (∼0.4 eV higher ...
... This displacement of the Fermi level from the top of the valence band to the bottom of the conduction band leads to a shift in the XPS spectra, since the Fermi level of the sample is aligned with that of the spectrometer. A similar binding energy shift of ∼1.4 eV in the O 1s spectrum (∼0.4 eV higher ...
ZnS Core-Shell Quantum Dots
... nanocrystallites3-5 have paved the way for numerous spectroscopic studies6-11 assigning the quantum dot electronic states and mapping out their evolution as a function of size. Core-shell type composite quantum dots exhibit novel properties making them attractive from both an experimental and a prac ...
... nanocrystallites3-5 have paved the way for numerous spectroscopic studies6-11 assigning the quantum dot electronic states and mapping out their evolution as a function of size. Core-shell type composite quantum dots exhibit novel properties making them attractive from both an experimental and a prac ...
Shell or Dots − Precursor Controlled Morphology
... Experimental Methods). This shell is similar to that observed in an earlier study, where we reported the formation of a Au shell on hexagonal pyramidal CdSe NPs with Au-DTAB solutions containing amines.17 Making this shell visible proved intricate, as it was readily destroyed by interaction with the ...
... Experimental Methods). This shell is similar to that observed in an earlier study, where we reported the formation of a Au shell on hexagonal pyramidal CdSe NPs with Au-DTAB solutions containing amines.17 Making this shell visible proved intricate, as it was readily destroyed by interaction with the ...
Growth and Nano-structural Studies of Metallic Multilayers for X-ray Mirrors Naureen Ghafoor
... target magnetron sputtering under high vacuum (v10−7 Torr) conditions. The effect of low and high ion-flux bombardment of low energy (<50 eV) Ar ions, on growing surfaces was studied for all material systems. Furthermore, a two-stage deposition of each individual layer with modulated ion-energies was ...
... target magnetron sputtering under high vacuum (v10−7 Torr) conditions. The effect of low and high ion-flux bombardment of low energy (<50 eV) Ar ions, on growing surfaces was studied for all material systems. Furthermore, a two-stage deposition of each individual layer with modulated ion-energies was ...
Fundamentals of Semiconductors
... Errors seem to decay exponentially with time. We thought that in the second edition we had already fixed most of the errors in the original edition. Unfortunately, we have become keenly aware of the truth contained in this timeless saying: “to err is human”. It is true that the number of errors disc ...
... Errors seem to decay exponentially with time. We thought that in the second edition we had already fixed most of the errors in the original edition. Unfortunately, we have become keenly aware of the truth contained in this timeless saying: “to err is human”. It is true that the number of errors disc ...
Flotation behaviour and surface characteristics of the artificial
... Figure 7 shows the FTIR spectra of sodium oleate. The asymmetric stretching vibrations and symmetric stretching vibrations of –CH2– in sodium oleate exhibit peak values of 2921.47 and 2851.37 cm−1, respectively. The –COO– characteristic peak value of 1561.15 cm−1 is attributed to an asymmetric stret ...
... Figure 7 shows the FTIR spectra of sodium oleate. The asymmetric stretching vibrations and symmetric stretching vibrations of –CH2– in sodium oleate exhibit peak values of 2921.47 and 2851.37 cm−1, respectively. The –COO– characteristic peak value of 1561.15 cm−1 is attributed to an asymmetric stret ...
O - Verhandlungen
... field is familiar to surface scientists in the form of surface plasmons, for example. To control the near field we have developed a new class of materials with properties not found in nature. These new materials derive their properties not from the atomic and molecular constituents of the solid, but ...
... field is familiar to surface scientists in the form of surface plasmons, for example. To control the near field we have developed a new class of materials with properties not found in nature. These new materials derive their properties not from the atomic and molecular constituents of the solid, but ...
Theory of Excitation Energy Transfer in Pigment - diss.fu
... from experiments investigating the oxygen production efficiency of algae that only a tiny fractional amount (less than 0.05 %) of the pigments contributes directly to the photochemical reactions. Antenna pigments transfer excitation energy with high quantum yield to the reaction centers, where it is ...
... from experiments investigating the oxygen production efficiency of algae that only a tiny fractional amount (less than 0.05 %) of the pigments contributes directly to the photochemical reactions. Antenna pigments transfer excitation energy with high quantum yield to the reaction centers, where it is ...
Corrosion studies of LiH thin films
... resulted in the full conversion of LiOH to Li2O. Again, the techniques used in these studies lacked surface sensitivity and therefore it is likely that small amounts of LiOH were still present on the surface after heating but were not able to be observed. The peak shape used for fitting was the same ...
... resulted in the full conversion of LiOH to Li2O. Again, the techniques used in these studies lacked surface sensitivity and therefore it is likely that small amounts of LiOH were still present on the surface after heating but were not able to be observed. The peak shape used for fitting was the same ...
tailoringoxidepro
... Cu(111), which is used as a substrate to explore charge transport to nanostructures including Au adatoms24–26 . While the stoichiometry and atomic structure of ultra-thin MgO corresponds that of the bulk MgO, this is not always the case. The most prominent example of this is an ultra-thin alumina fi ...
... Cu(111), which is used as a substrate to explore charge transport to nanostructures including Au adatoms24–26 . While the stoichiometry and atomic structure of ultra-thin MgO corresponds that of the bulk MgO, this is not always the case. The most prominent example of this is an ultra-thin alumina fi ...
The Thomas-Fermi model: momentum expectation values
... and use of the symmetry property of Gegenbauer’s polynomials C"(x) _ ( - 1 )"’ Cm( - x) results in a relationship between expectation values pb )nl for different b : ...
... and use of the symmetry property of Gegenbauer’s polynomials C"(x) _ ( - 1 )"’ Cm( - x) results in a relationship between expectation values pb )nl for different b : ...
The Temperature Dependence Of The Gain In
... with an activation energy of 25meV, dominates the current. The lower To values in the 1.3µm devices of 42K and 50K respectively temperature dependence of the differential ...
... with an activation energy of 25meV, dominates the current. The lower To values in the 1.3µm devices of 42K and 50K respectively temperature dependence of the differential ...
Atom-Wall interaction
... The knowledge of the atomic structure, at least in the free-space, is usually extremely precise. This permits a detailed description of the atom-surface interaction provided the dense medium itself is described not in an ideal manner, but realistically (dispersive dielectric medium, real metal, ...) ...
... The knowledge of the atomic structure, at least in the free-space, is usually extremely precise. This permits a detailed description of the atom-surface interaction provided the dense medium itself is described not in an ideal manner, but realistically (dispersive dielectric medium, real metal, ...) ...
Vers un plan détaillé (début 08/11/01)
... The knowledge of the atomic structure, at least in the free-space, is usually extremely precise. This permits a detailed description of the atom-surface interaction provided the dense medium itself is described not in an ideal manner, but realistically (dispersive dielectric medium, real metal, ...) ...
... The knowledge of the atomic structure, at least in the free-space, is usually extremely precise. This permits a detailed description of the atom-surface interaction provided the dense medium itself is described not in an ideal manner, but realistically (dispersive dielectric medium, real metal, ...) ...
Auger electron spectroscopy
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Auger electron spectroscopy (AES; pronounced [oʒe] in French) is a common analytical technique used specifically in the study of surfaces and, more generally, in the area of materials science. Underlying the spectroscopic technique is the Auger effect, as it has come to be called, which is based on the analysis of energetic electrons emitted from an excited atom after a series of internal relaxation events. The Auger effect was discovered independently by both Lise Meitner and Pierre Auger in the 1920s. Though the discovery was made by Meitner and initially reported in the journal Zeitschrift für Physik in 1922, Auger is credited with the discovery in most of the scientific community. Until the early 1950s Auger transitions were considered nuisance effects by spectroscopists, not containing much relevant material information, but studied so as to explain anomalies in x-ray spectroscopy data. Since 1953 however, AES has become a practical and straightforward characterization technique for probing chemical and compositional surface environments and has found applications in metallurgy, gas-phase chemistry, and throughout the microelectronics industry.