Vibrational Energy Pooling in CO on NaCl(100):  Simulation and Isotope Effects†

2002 ◽  
Vol 106 (45) ◽  
pp. 10849-10860 ◽  
Author(s):  
S. A. Corcelli ◽  
J. C. Tully
Keyword(s):  
Vibrational Energy ◽  
Isotope Effects ◽  
Energy Pooling

Vibrational energy pooling in CO on NaCl(100): Methods

2002 ◽  
Vol 116 (18) ◽  
pp. 8079-8092 ◽  
Author(s):  
S. A. Corcelli ◽  
J. C. Tully
Keyword(s):  
Vibrational Energy ◽  
Energy Pooling

scholarly journals The Sommerfeld ground-wave limit for a molecule adsorbed at a surface

Science ◽  
2018 ◽  
Vol 363 (6423) ◽  
pp. 158-161 ◽  
Author(s):  
Li Chen ◽  
Jascha A. Lau ◽  
Dirk Schwarzer ◽  
Jörg Meyer ◽  
Varun B. Verma ◽  
...  
Keyword(s):  
Vibrational Energy ◽  
Single Photon ◽  
Kinetic Monte Carlo ◽  
Near Field ◽  
Infrared Emission ◽  
Single Photon Detector ◽  
Vibrationally Excited ◽  
Energy Pooling ◽  
Kinetic Monte Carlo Simulations ◽  
Wave Limit

Using a mid-infrared emission spectrometer based on a superconducting nanowire single-photon detector, we observed the dynamics of vibrational energy pooling of carbon monoxide (CO) adsorbed at the surface of a sodium chloride (NaCl) crystal. After exciting a majority of the CO molecules to their first vibrationally excited state (v = 1), we observed infrared emission from states up to v = 27. Kinetic Monte Carlo simulations showed that vibrational energy collects in a few CO molecules at the expense of those up to eight lattice sites away by selective excitation of NaCl’s transverse phonons. The vibrating CO molecules behave like classical oscillating dipoles, losing their energy to NaCl lattice vibrations via the electromagnetic near-field. This is analogous to Sommerfeld’s description of radio transmission along Earth’s surface by ground waves.

Isotope effects in the transfer of vibrational energy in gaseous collisions

1963 ◽  
Vol 272 (1351) ◽  
pp. 481-489 ◽  
Keyword(s):  
Energy Transfer ◽  
Vibrational Energy ◽  
Isotope Effects ◽  
Methyl Chloride ◽  
Steric Factor ◽  
The Other ◽  
Accurate Information ◽  
Effects Of Rotation ◽  
Catalytic Effects ◽  
Good Agreement

Previously available studies of isotope effects in catalysts for the transfer of vibrational energy have been extended by comparing catalytic effects of NH 3 and ND 3 . For each of the three vibrators, ethylene, methyl chloride, and cyclo propane, vibration-vibration transfer appears to be only of subsidiary importance in the overall catalysis observed. With these vibrators, good agreement is found between observed relative efficiencies of H 2 O and D 2 O, and H 3 N and D 3 N as energy transfer catalysts. With ethylene, relative efficiencies of H 3 N and D 3 N can probably be attributed to mass differences. But even after allowing for mass differences of the isotopic molecules, collisions with some of the other vibrators show residual predominance of the hydrogen over the deuterium derivative as catalyst. This can possibly be attributed to effects of rotation during a collision, on the steric factor. To advance our knowledge about energy transfer further, more accurate information is needed about the origin and magnitude of inter-molecular repulsions.

Vibrational Lifetimes of Hydrogen in Silicon: Isotope Effects and MOSFET Reliability

2004 ◽  
Vol 813 ◽  
Author(s):  
Gunter Lüpke ◽  
Baozhou Sun ◽  
Norman H. Tolk ◽  
Leonard C. Feldman
Keyword(s):  
Vibrational Energy ◽  
Isotope Effects ◽  
Silicon Isotope ◽  
Vibrational States ◽  
Local Modes ◽  
And Migration ◽  
The Relationship ◽  
Coupling Mechanisms ◽  
Transfer Channels

ABSTRACTCharacterization of defect and impurity reactions, dissociation and migration in semiconductors requires detailed understanding of rates and pathways of vibrational energy flow, of energy transfer channels and of coupling mechanisms between local modes and the phonon bath of the host material. Significant progress in reaching this goal has been accomplished in recent landmark studies exploring the excitation and dynamics of vibrational states associated with hydrogen in silicon. We describe recent experiments which measure the vibrational lifetime of the Si-H bond in various defect configurations and show the relationship between these lifetimes and silicon MOSFET reliability.

Estimates of Dielectric Shifts in Infrared Spectra of Pure Liquids for Use in the Theoretical Evaluation of Vapor Pressure Isotope Effects

1983 ◽  
Vol 38 (2) ◽  
pp. 191-195 ◽  
Author(s):  
Bärbel Maessen ◽  
Max Wolfsberg
Keyword(s):  
Excited State ◽  
Vapor Pressure ◽  
Infrared Spectra ◽  
Simple Formula ◽  
Vibrational Energy ◽  
Isotope Effects ◽  
Zero Point ◽  
Theoretical Evaluation ◽  
Dielectric Effect ◽  
Zero Point Vibrational Energy

Abstract Observed fundamentals in infrared spectra of pure liquids are red-shifted by the so-called "dielectric effect". This dielectric shift is an excited state effect, and the observed fundamentals must be corrected before one deduces the isotope effects on the zero-point vibrational energy which are needed in the theoretical evaluation of vapor pressure isotope effects. A simple formula is applied to calculate the dielectric shift, which requires only the molar concentration and the integrated absorption coefficient for the fundamental.

On the relation between isotope effects on vapour pressure and molecular structure

1963 ◽  
Vol 60 ◽  
pp. 52-55
Author(s):  
István Kiss ◽  
Lajos Matus ◽  
István Opauszky
Keyword(s):  
Molecular Structure ◽  
Vapour Pressure ◽  
Isotope Effects

Simply supported FPEDs connected by springs for broadband energy harvesting

2020 ◽  
Vol 64 (1-4) ◽  
pp. 201-210
Author(s):  
Yoshikazu Tanaka ◽  
Satoru Odake ◽  
Jun Miyake ◽  
Hidemi Mutsuda ◽  
Atanas A. Popov ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Evaluation Method ◽  
Energy Harvester ◽  
Vibrational Energy ◽  
Functional Materials ◽  
Vibration Energy ◽  
Theoretical Evaluation ◽  
Vibration Energy Harvester ◽  
Polyvinylidene Difluoride ◽  
Simply Supported

Energy harvesting methods that use functional materials have attracted interest because they can take advantage of an abundant but underutilized energy source. Most vibration energy harvester designs operate most effectively around their resonant frequency. However, in practice, the frequency band for ambient vibrational energy is typically broad. The development of technologies for broadband energy harvesting is therefore desirable. The authors previously proposed an energy harvester, called a flexible piezoelectric device (FPED), that consists of a piezoelectric film (polyvinylidene difluoride) and a soft material, such as silicon rubber or polyethylene terephthalate. The authors also proposed a system based on FPEDs for broadband energy harvesting. The system consisted of cantilevered FPEDs, with each FPED connected via a spring. Simply supported FPEDs also have potential for broadband energy harvesting, and here, a theoretical evaluation method is proposed for such a system. Experiments are conducted to validate the derived model.

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