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Effect of spatial distribution of dissipated power on modeling of SMR BAW resonators at high power levels.

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

Tag A, Bader B, Huck C, Karolewski D, Pitschi M, Weigel R, Hagelauer A.
PMID: 26470048
IEEE Trans Ultrason Ferroelectr Freq Control. 2015 Oct;62(10):1856-64. doi: 10.1109/TUFFC.2015.007036.

The modeling of bulk acoustic wave resonators at elevated power levels has been improved by taking the spatial distribution of the dominating loss mechanisms into account. The spatial distribution of the dissipated power enables more accurate modeling of the...

Analysis of trivalent cation complexation to functionalized mesoporous silica using solid-state NMR spectroscopy.

Dalton transactions (Cambridge, England : 2003)

Shusterman J, Mason H, Bruchet A, Zavarin M, Kersting AB, Nitsche H.
PMID: 25265419
Dalton Trans. 2014 Nov 28;43(44):16649-58. doi: 10.1039/c4dt02380c.

Functionalized mesoporous silica has applications in separations science, catalysis, and sensors. In this work, we studied the fundamental interactions of trivalent cations with functionalized mesoporous silica. We contacted trivalent cations of varying ionic radii with N-[5-(trimethoxysilyl)-2-aza-1-oxopentyl]caprolactam functionalized mesoporous silica...

Identifying Descriptors for Solvent Stability in Nonaqueous Li-O2 Batteries.

The journal of physical chemistry letters

Khetan A, Pitsch H, Viswanathan V.
PMID: 26269974
J Phys Chem Lett. 2014 Apr 17;5(8):1318-23. doi: 10.1021/jz500485r. Epub 2014 Mar 28.

One crucial challenge in developing rechargeable Li-O2 batteries is to identify a stable solvent that is resistant to decomposition in the electrochemical environment of Li2O2. We attempt to identify descriptors that could be used to test for solvent stability....

Chemical characterization of bohrium (element 107).

Nature

Eichler R, Bruchle W, Dressler R, Dullmann CE, Eichler B, Gaggeler HW, Gregorich KE, Hoffman DC, Hubener S, Jost DT, Kirbach UW, Laue CA, Lavanchy VM, Nitsche H, Patin JB, Piguet D, Schadel M, Shaughnessy DA, Strellis DA, Taut S, Tobler L, Tsyganov YS, Turler A, Vahle A, Wilk PA, Yakushev AB.
PMID: 10993071
Nature. 2000 Sep 07;407(6800):63-5. doi: 10.1038/35024044.

The arrangement of the chemical elements in the periodic table highlights resemblances in chemical properties, which reflect the elements' electronic structure. For the heaviest elements, however, deviations in the periodicity of chemical properties are expected: electrons in orbitals with...

Stochastic mixing model with power law decay of variance.

Physical review. E, Statistical, nonlinear, and soft matter physics

Fedotov S, Ihme M, Pitsch H.
PMID: 15697725
Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Jan;71(1):016310. doi: 10.1103/PhysRevE.71.016310. Epub 2005 Jan 14.

A stochastic mixing model based on the law of large numbers is presented that describes the decay of the variance of a conserved scalar in decaying turbulence as a power law, sigma2(c) proportional t(-alpha). A general Lagrangian mixing process...

Capabilities of femtosecond laser ablation ICP-MS for the major, minor, and trace element analysis of high alloyed steels and super alloys.

Analytical and bioanalytical chemistry

Wiltsche H, Günther D.
PMID: 21221547
Anal Bioanal Chem. 2011 Feb;399(6):2167-74. doi: 10.1007/s00216-010-4605-8. Epub 2011 Jan 08.

Femtosecond laser ablation inductively coupled plasma mass spectrometry was used for the quantification of 23 metallurgical relevant elements in unalloyed, alloyed and highly alloyed steels, and super alloys. It was shown that by using scanning mode ablation with large...

Solvation effects on isomeric preferences of curium(iii) complexes with multidentate phosphonopropionic acid ligands: CmH(2)PPA(2+) and CmHPPA(+) complexes.

Inorganic chemistry

Cao Z, Balasubramanian K, Calvert MG, Nitsche H.
PMID: 19757852
Inorg Chem. 2009 Oct 19;48(20):9700-14. doi: 10.1021/ic901054h.

We have carried out both time-resolved laser fluorescence spectroscopic and computational studies on the complexes of curium(III) with multidentate Phosphonopropionic (PPA) acid ligands. A number of complexes of Cm(III) with these ligands, such as CmH(2)PPA(2+), CmHPPA(+), Cm[H(2)PPA](2)(+), and Cm[HPPA](2)(-)...

Quantum gas of deeply bound ground state molecules.

Science (New York, N.Y.)

Danzl JG, Haller E, Gustavsson M, Mark MJ, Hart R, Bouloufa N, Dulieu O, Ritsch H, Nägerl HC.
PMID: 18719277
Science. 2008 Aug 22;321(5892):1062-6. doi: 10.1126/science.1159909. Epub 2008 Jul 10.

Molecular cooling techniques face the hurdle of dissipating translational as well as internal energy in the presence of a rich electronic, vibrational, and rotational energy spectrum. In our experiment, we create a translationally ultracold, dense quantum gas of molecules...

Cold atom dynamics in a quantum optical lattice potential.

Physical review letters

Maschler C, Ritsch H.
PMID: 16486317
Phys Rev Lett. 2005 Dec 31;95(26):260401. doi: 10.1103/PhysRevLett.95.260401. Epub 2005 Dec 19.

We study a generalized cold atom Bose-Hubbard model, where the periodic optical potential is formed by a cavity field with quantum properties. On the one hand, the common coupling of all atoms to the same mode introduces cavity-mediated long-range...

Self ordering threshold and superradiant backscattering to slow a fast gas beam in a ring cavity with counter propagating pump.

Optics express

Maes C, Asbóth JK, Ritsch H.
PMID: 19546906
Opt Express. 2007 May 14;15(10):6019-35. doi: 10.1364/oe.15.006019.

We study the dynamics of a fast gaseous beam in a high Q ring cavity counter propagating a strong pump laser with large detuning from any particle optical resonance. As spontaneous emission is strongly suppressed the particles can be...

Precision molecular spectroscopy for ground state transfer of molecular quantum gases.

Faraday discussions

Danzl JG, Mark MJ, Haller E, Gustavsson M, Bouloufa N, Dulieu O, Ritsch H, Hart R, Nägerl HC.
PMID: 20151549
Faraday Discuss. 2009;142:283-95; discussion 319-34. doi: 10.1039/b820542f.

One possibility for the creation of ultracold, high phase space density quantum gases of molecules in the rovibronic ground state relies on first associating weakly-bound molecules from quantum-degenerate atomic gases on a Feshbach resonance and then transferring the molecules...

Temperature gradient driven lasing and stimulated cooling.

Physical review letters

Sandner K, Ritsch H.
PMID: 23215382
Phys Rev Lett. 2012 Nov 09;109(19):193601. doi: 10.1103/PhysRevLett.109.193601. Epub 2012 Nov 07.

A laser can be understood as a thermodynamic engine converting heat to a coherent single mode field close to Carnot efficiency. To achieve lasing, spectral shaping of the excitation light is used to generate a higher effective temperature on...

Showing 1 to 12 of 138 entries