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Showing 25 to 35 of 35 entries
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High-resolution spectroscopy of NO in helium droplets: a prototype for open shell molecular interactions in a quantum solvent.

Physical review letters

von Haeften K, Metzelthin A, Rudolph S, Staemmler V, Havenith M.
PMID: 16384151
Phys Rev Lett. 2005 Nov 18;95(21):215301. doi: 10.1103/PhysRevLett.95.215301. Epub 2005 Nov 14.

We have measured the high-resolution infrared spectrum of the radical NO in the (2)Pi(1/2) state in superfluid helium nanodroplets. The features are attributed to the -doubling splitting and the hyperfine structure. The hyperfine interaction is found to be unaffected...

Novel gas-stabilized iron clusters: synthesis, structure and magnetic behaviour.

Nanotechnology

Crisan O, von Haeften K, Ellis AM, Binns C.
PMID: 19942774
Nanotechnology. 2008 Dec 17;19(50):505602. doi: 10.1088/0957-4484/19/50/505602. Epub 2008 Nov 25.

A novel method for the synthesis of nanostructured films produced by depositing gas-phase magnetic nanoparticles is presented and the properties of the films are reported. The technique mixes metal vapour and small argon clusters produced in a supersonic expansion....

Electron mobility in liquid and supercritical helium measured using corona discharges: a new semi-empirical model for cavity formation.

Physical chemistry chemical physics : PCCP

Aitken F, Li ZL, Bonifaci N, Denat A, von Haeften K.
PMID: 21052578
Phys Chem Chem Phys. 2011 Jan 14;13(2):719-24. doi: 10.1039/c0cp00786b. Epub 2010 Nov 04.

Electron mobilities in supercritical and liquid helium were investigated as a function of the density. The mobilities were derived from I(V) curves measured in a high-pressure cryogenic cell using a corona discharge in point-plane electrode geometry for charge generation....

Formation of Positively Charged Liquid Helium Clusters in Supercritical Helium and their Solidification upon Compression.

The journal of physical chemistry letters

Tarchouna HG, Bonifaci N, Aitken F, Mendoza Luna LG, von Haeften K.
PMID: 26267199
J Phys Chem Lett. 2015 Aug 06;6(15):3036-40. doi: 10.1021/acs.jpclett.5b01159. Epub 2015 Jul 20.

Positively charged ions were produced in supercritical helium at temperatures from 6 to 10 K and up to 2 MPa using a corona discharge. Their mobility was measured via current-voltage curves, and the hydrodynamic radius was derived using Stokes...

Dexmedetomidine Restores Autophagic Flux, Modulates Associated microRNAs and the Cholinergic Anti-inflammatory Pathway upon LPS-Treatment in Rats.

Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology

Kho W, von Haefen C, Paeschke N, Nasser F, Endesfelder S, Sifringer M, González-López A, Lanzke N, Spies CD.
PMID: 34357471
J Neuroimmune Pharmacol. 2021 Aug 06; doi: 10.1007/s11481-021-10003-w. Epub 2021 Aug 06.

Infections and perioperative stress can lead to neuroinflammation, which in turn is linked to cognitive impairments such as postoperative delirium or postoperative cognitive dysfunctions. The α2-adrenoceptor agonist dexmedetomidine (DEX) prevents cognitive impairments and has organo-protective and anti-inflammatory properties. Macroautophagy...

Noise-sustained structures in differential-flow reactors with autocatalytic kinetics.

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

von Haeften B, Izús G.
PMID: 12786250
Phys Rev E Stat Nonlin Soft Matter Phys. 2003 May;67(5):056207. doi: 10.1103/PhysRevE.67.056207. Epub 2003 May 19.

We have studied the formation of noise-sustained structures in a differential-flow reactor with cubic autocatalytic kinetics (the Gray-Scott model). In this system the interplay between advection, diffusion, reaction, and noise fluctuations leads to the formation of noise-sustained patterns in...

Probing collective excitations in helium nanodroplets: observation of phonon wings in the infrared spectrum of methane.

The Journal of chemical physics

Rudolph S, Wollny G, von Haeften K, Havenith M.
PMID: 17411134
J Chem Phys. 2007 Mar 28;126(12):124318. doi: 10.1063/1.2709887.

The authors have recorded the nu(3) infrared spectrum of methane in helium nanodroplets using our cw infrared optical parametric oscillator. In a previous paper, Nauta and Miller [Chem. Phys. Lett. 350, 225 (2001)] reported the observation of the monomer...

Lineshape of rotational spectrum of CO in (4)He droplets.

The Journal of chemical physics

Zillich RE, Whaley KB, von Haeften K.
PMID: 18331089
J Chem Phys. 2008 Mar 07;128(9):094303. doi: 10.1063/1.2833979.

In a recent experiment the rovibrational spectrum of CO isotopomers in superfluid helium-4 droplets was measured, and a Lorentzian lineshape with a large line width of 0.024 K (half width at half maximum) was observed [von Haeften et al.,...

Size and isotope effects of helium clusters and droplets: identification of surface and bulk-volume excitations.

The journal of physical chemistry. A

von Haeften K, Laarmann T, Wabnitz H, Möller T, Fink K.
PMID: 21466205
J Phys Chem A. 2011 Jun 30;115(25):7316-26. doi: 10.1021/jp2008489. Epub 2011 Apr 05.

We report a comprehensive investigation of the electronically excited states of helium clusters and droplets of sizes ranging from a few to several 10(7) atoms using time-resolved fluorescence excitation spectroscopy and quantum chemical ab initio calculations. We employ various...

Chemical reaction dynamics I and electron dynamics in molecules: general discussion.

Faraday discussions

Vendrell O, Küpper J, Wolf M, Chapman H, Chergui M, Reid K, von Haeften K, Moshammer R, Williams G, Tehlar A, Dixit G, Wörner HJ, Underwood J, Marangos J, Woerner M, Bressler C, Minitti M, Kirrander A, Vozzi C, Rolles D.
PMID: 25285433
Faraday Discuss. 2014;171:145-68. doi: 10.1039/c4fd90014f. Epub 2014 Oct 06.

No abstract available.

Uncertainties in land use data may have substantial effects on environmental planning recommendations: A plea for careful consideration.

PloS one

Neuendorf F, Thiele J, Albert C, von Haaren C.
PMID: 34818356
PLoS One. 2021 Nov 24;16(11):e0260302. doi: 10.1371/journal.pone.0260302. eCollection 2021.

A key challenge of environmental planning is to craft recommendations for future sustainable spatial development amid ubiquitous uncertainties. This paper aims to explore how different data uncertainties, usually unknown to the planner, may influence environmental planning recommendations. We apply...

Showing 25 to 35 of 35 entries