Search results for "germanium"
showing 10 items of 249 documents
CCDC 955301: Experimental Crystal Structure Determination
2013
Related Article: Brian D. Rekken , Thomas M. Brown , James C. Fettinger , Felicitas Lips , Heikki M. Tuononen , Rolfe H. Herber , and Philip P. Power|2013|J.Am.Chem.Soc.|135|10134|doi:10.1021/ja403802a
CCDC 1431126: Experimental Crystal Structure Determination
2015
Related Article: Jeremy D. Erickson, Petra Vasko, Ryan D. Riparetti, James C. Fettinger, Heikki M. Tuononen, Philip P. Power|2015|Organometallics|34|5785|doi:10.1021/acs.organomet.5b00884
CCDC 1505086: Experimental Crystal Structure Determination
2016
Related Article: Madison L. McCrea-Hendrick, ChristineA. Caputo, Jarno Linnera, Petra Vasko, CoryM. Weinstein, James C. Fettinger, Heikki M. Tuononen, and PhilipP. Power|2016|Organometallics|35|2759|doi:10.1021/acs.organomet.6b00519
CCDC 1505085: Experimental Crystal Structure Determination
2016
Related Article: Madison L. McCrea-Hendrick, ChristineA. Caputo, Jarno Linnera, Petra Vasko, CoryM. Weinstein, James C. Fettinger, Heikki M. Tuononen, and PhilipP. Power|2016|Organometallics|35|2759|doi:10.1021/acs.organomet.6b00519
Matrix isolation studies on the co-condensation reactions of molecular SiO and GeO: the characterisation of the novel cyclic species SiGeO(2), Si(2)G…
2010
Matrix isolation IR studies, together with DFT calculations, have established that the co-condensation of molecular SiO and GeO in low temperature (12 K) nitrogen matrices leads to the formation of the novel silicon germanium oxide species SiGeO(2), Si(2)GeO(3) and SiGe(2)O(3) analogous to the known dimer and trimer species M(2)O(2) and M(3)O(3) (M = Si, Ge). Controlled diffusion studies in the temperature range 20-34 K result in a significant increase in trimer formation, which implies a very low activation energy for this oligomerisation step. Characteristic IR modes are assigned for all three novel mixed oxide molecules, and the DFT calculations establish that these species have cyclic C…
Experimental evidence of an incomplete thermalization of the energy in an x-ray microcalorimeter with a TaAu absorber.
2008
We have conducted an experimental test at our XACT facility using an x-ray microcalorimeter with Ta∕Au absorber and neutron transmutation doped germanium thermal sensor. The test was aimed at measuring the percentage of energy effectively thermalized after absorption of x-ray photons in superconducting tantalum. Moreover, in general, possible formation of long living quasiparticles implies that by using a superconducting absorber, a fraction of the deposited energy could not be thermalized on the useful time scale of the thermal sensor. To investigate this scenario, we exploited an absorber made of gold, where no energy trapping is expected, with a small piece of superconducting tantalum at…
A fully planar approach to the construction of X-Ray microcalorimeters with doped Germanium sensors
2008
We have investigated a fully planar technology for the development of arrays of X-ray microcalorimeters with doped germanium thermal sensor. We describe the proposed approach and show promising results obtained with the deep etching of germanium, the most critical step of the whole process.
UV photoexcitation of a dissolved metalloid Ge9 cluster compound and its extensive ultrafast response.
2015
Femtosecond pump-probe absorption spectroscopy in tetrahydrofuran solution has been used to investigate the dynamics of a metalloid cluster compound {Ge9[Si(SiMe3)3]3}(-). Upon UV photoexcitation, the transients in the near-infrared spectral region showed signatures reminiscent of excess electrons in THF (bound or quasi-free) whereas in the visible part excited state dynamics of the cluster complex dominates.
Femtometer accuracy EXAFS measurements: Isotopic effect in the first, second and third coordination shells of germanium
2009
The analysis of the EXAFS signals from 70Ge and 76Ge has evidenced the low-temperature effect of isotopic mass difference on the amplitude of relative atomic vibrations. This effect is reflected in the difference of the Debye-Waller factors of the first three coordination shells, and on the difference of nearest-neighbour average interatomic distances, evaluated with femtometer accuracy. The experimental results are in agreement with theoretical expectations.
Broadband telecom to mid-infrared supercontinuum generation in a dispersion-engineered silicon germanium waveguide.
2015
We demonstrate broadband supercontinuum generation (SCG) in a dispersion-engineered silicon-germanium waveguide. The 3 cm long waveguide is pumped by femtosecond pulses at 2.4 μm, and the generated supercontinuum extends from 1.45 to 2.79 μm (at the −30 dB point). The broadening is mainly driven by the generation of a dispersive wave in the 1.5–1.8 μm region and soliton fission. The SCG was modeled numerically, and excellent agreement with the experimental results was obtained.