reduction of coherent phonon lifetime in bi2te3 sb2te3 superlattices
reduction of coherent phonon lifetime in bi2te3 sb2te3 superlattices
... measurement of coherent phonon lifetime reduction in superlattice structures, consistent with the observed reduction in thermal conductivity in superlattices. © 2008 American Institute of Physics. ... from interface scattering of phonons 9,10 as well as other processes. 7 Even so, there has been no documented evidence of reduction in phonon lifetimes, coherent...
Ngày tải lên: 06/05/2014, 08:54
reduction of coherent phonon lifetime in bi2te3 sb2te3 superlattices
... measurement of coherent phonon lifetime reduction in superlattice structures, consistent with the observed reduction in thermal conductivity in superlattices. © 2008 American Institute of Physics. ... from interface scattering of phonons 9,10 as well as other processes. 7 Even so, there has been no documented evidence of reduction in phonon lifetimes, coherent...
Ngày tải lên: 06/05/2014, 08:58
acoustic phonon scattering in bi2te3 sb2te3 superlattices
... improve the figure of merit, a significant amount of studies have been focused on reducing the lattice thermal conductivity through increasing phonon scattering by engineering superlattices, 1 filled ... long-wavelength phonon scattering can provide insight to the understanding of the thermal conductivity in SL films. Figure 2 shows coherent acoustic phonon signals mea- sured i...
Ngày tải lên: 06/05/2014, 08:53
coherent phonon excitation in bismuth
... two LA(L) phonons with equal energy are emitted by a single A 1g phonon since the frequency of the LA(L) phonon is half of that of the A 1g phonon, and one LA(T) phonon and one LA(X) phonon are ... one A 1g phonon since the combined energy of LA(T) and LA(X) phonons equals to the energy of A 1g .TheTA(X) phonon could be generated b y a more complex process of three p...
Ngày tải lên: 06/05/2014, 08:55
origin of coherent phonons in bi2te3 excited by ultrafast laser pulses
... re- sulting complex phonon oscillation are still a subject of discussion. In this paper, we employ femtosecond time-resolved phonon spectroscopy to investigate coherent phonon dynamics in single-crystal ... materials, knowing phonon excitation and inter- action processes is vital f or the investigation of transport properties. It has been generallyestablished that in absor...
Ngày tải lên: 06/05/2014, 08:54
origin of coherent phonons in bi2te3 excited by ultrafast laser pulses
... re- sulting complex phonon oscillation are still a subject of discussion. In this paper, we employ femtosecond time-resolved phonon spectroscopy to investigate coherent phonon dynamics in single-crystal ... materials, knowing phonon excitation and inter- action processes is vital f or the investigation of transport properties. It has been generallyestablished that in absor...
Ngày tải lên: 06/05/2014, 08:58
Sanitation in Urban Poor Settlement and the Importance of Education for the Reduction of the Diffused Pollution - A Case Study of Bauniabad, Bangladesh
... system. In most of the cases, the wastewater at sampling point 2 (inside of inlet chamber), point 3 (inside of hydraulic chamber) and point 4 (inside of soak pit), were found to be in solidified ... latrines and hand pumps which were installed at the beginning of the establishment of Bauniabad area. The main activities included; (i) a baseline and needs assessment survey, (...
Ngày tải lên: 05/09/2013, 09:08
Tài liệu Báo cáo khoa học: Enzymes for the NADPH-dependent reduction of dihydroxyacetone and D-glyceraldehyde and L-glyceraldehyde in the mould Hypocrea jecorina doc
... The GLD1 pro- tein was tagged with a histidine tag at the N-terminal end by adding the coding sequence for six histidines to the end of the open reading frame, and then expressed in S. cerevisiae. ... mg of extracted protein. In the control strain carrying the empty plas- mid, this activity was below 0.1 nkatÆmg )1 . The activ- ity with NADPH and dl-glyceraldehyde in an extract of...
Ngày tải lên: 19/02/2014, 06:20
The National Road Map Strategic Plan To Accelerate Reduction of Maternal, Newborn and Child Deaths in Tanzania 2008 - 2015 potx
... skills of service providers related to inadequate incorporation of neonatal content in pre- and in- service training curricula. A recent study conducted in Dar es Salaam in 2005 showed that none of ... mortality reduction in an integrated manner addressing the continuum of care. The rationale for taking the integrated approach relies on a number of factors: 1. Specific in...
Ngày tải lên: 07/03/2014, 04:20
Báo cáo Y học: Role of critical charged residues in reduction potential modulation of ferredoxin-NADP+ reductase Differential stabilization of FAD redox forms doc
... binding energies for the apoFNR:FAD complexes in any redox state. However, as the reduction potentials of free and bound FAD are linked to the binding affinities of the FAD redox forms to apoFNR, ... neighbouring E301 results in destabilization of the hydroquinone FAD:apoFNR com- plex relative to those complexes involving the quinone and semiquinone. Such effect would not be produc...
Ngày tải lên: 08/03/2014, 23:20