Geil, Burkhard

[["dc.bibliographiccitation.firstpage","1063"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Zeitschrift für physikalische Chemie"],["dc.bibliographiccitation.lastpage","1077"],["dc.bibliographiccitation.volume","223"],["dc.contributor.author","Pospiech, E.-M."],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Fujara, Franz"],["dc.contributor.author","Winter, R."],["dc.date.accessioned","2018-11-07T08:35:43Z"],["dc.date.available","2018-11-07T08:35:43Z"],["dc.date.issued","2009"],["dc.description.abstract","The influence of incorporating the polypeptide gramicidin on the lateral mobility of the monoacylglyceride monoolcin (MO) in its bicontinuous cubic lipid mesophases is studied applying static field gradient NMR. The effects of gramicidin on the topology, structure and phase behaviour of the system are characterized by small-angle x-ray scattering (SAXS) experiments. On the structural level the experiments show significant shifts in the boundaries of the various mesophases. Measurements of the translational dynamics are restricted to cubic mesophases, where the diffusion coefficients of lipid and additive are determined both by geometrical obstruction and by lipid-protein interaction effects."],["dc.description.sponsorship","DFG"],["dc.identifier.doi","10.1524/zpch.2009.6058"],["dc.identifier.isi","000271326100010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/18142"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Oldenbourg Verlag"],["dc.relation.issn","0942-9352"],["dc.title","The Effect of Incorporation of Gramicidin on the Translational Lipid Diffusion in Bicontinuous Cubic Monoolein/Water Mesophases"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","011002"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Reviews of Modern Physics"],["dc.bibliographiccitation.volume","88"],["dc.contributor.author","Amann-Winkel, Katrin"],["dc.contributor.author","Böhmer, Roland"],["dc.contributor.author","Fujara, Franz"],["dc.contributor.author","Gainaru, Catalin"],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Loerting, Thomas"],["dc.date.accessioned","2020-12-10T18:25:53Z"],["dc.date.available","2020-12-10T18:25:53Z"],["dc.date.issued","2016"],["dc.description.abstract","Water is the most common and, judged from its numerous anomalous properties, the weirdest of all known liquids and the complexity of its pressure-temperature map is unsurpassed. A major obstacle on the way to a full understanding of water's structure and dynamics is the hard-to-explore territory within this map, colloquially named the no man's land. Many experiments suggest that just before stepping across its low-temperature border, amorphous ices undergo glass-to-liquid transitions while other interpretations emphasize the importance of underlying disordered (nano) crystalline states. Prospects for reconciling the conflicting views regarding the nature of water's glass transitions are discussed."],["dc.identifier.doi","10.1103/RevModPhys.88.011002"],["dc.identifier.eissn","1539-0756"],["dc.identifier.isi","000370254200001"],["dc.identifier.issn","0034-6861"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75869"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","1539-0756"],["dc.relation.issn","0034-6861"],["dc.title","Colloquium : Water’s controversial glass transitions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","576"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Physical Chemistry Chemical Physics"],["dc.bibliographiccitation.lastpage","580"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Loew, Florian"],["dc.contributor.author","Amann-Winkel, Katrin"],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Loerting, Thomas"],["dc.contributor.author","Wittich, Carolin"],["dc.contributor.author","Fujara, Franz"],["dc.date.accessioned","2018-11-07T09:30:16Z"],["dc.date.available","2018-11-07T09:30:16Z"],["dc.date.issued","2013"],["dc.description.abstract","The high-frequency reorientation dynamics of O-H-2 bonds is investigated in various amorphous ices including eHDA (expanded high density amorphous ice), LDA-II (low density amorphous ice II) and HGW (hyperquenched glassy water) using H-2-NMR spin-lattice relaxation as a local probe. Both low density forms, HGW and LDA-II, show similar spin-lattice relaxation but differ in the thermal stability with respect to the transition into crystalline cubic ice I-c. HGW already transforms slightly above 135 K whereas LDA-II crystallizes at 150 K. eHDA is distinguishable from other high density amorphous ices in its thermal stability and spin-lattice relaxation. Its relaxation times are much larger compared to those of VHDA (very high density amorphous ice) and uHDA (unrelaxed high density amorphous ice). eHDA does not show annealing effects, transforms sharply into LDA-II above 123 K and provides higher thermal stability as compared to other high density forms."],["dc.description.sponsorship","Austrian Science Fund [T463, Y391]; European Research Council"],["dc.identifier.doi","10.1039/c2cp43543h"],["dc.identifier.isi","000311963600022"],["dc.identifier.pmid","23183587"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10215"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31264"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Royal Soc Chemistry"],["dc.relation.issn","1463-9076"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Limits of metastability in amorphous ices: H-2-NMR relaxation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1093"],["dc.bibliographiccitation.issue","11-12"],["dc.bibliographiccitation.journal","Zeitschrift für physikalische Chemie"],["dc.bibliographiccitation.lastpage","1113"],["dc.bibliographiccitation.volume","226"],["dc.contributor.author","Pahlke, Hannes"],["dc.contributor.author","Lusceac, Sorin Adrian"],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Fujara, Franz"],["dc.date.accessioned","2018-11-07T09:14:39Z"],["dc.date.available","2018-11-07T09:14:39Z"],["dc.date.issued","2012"],["dc.description.abstract","The dynamics of partially deuterated water in zeolite NaY(Br) are investigated by a combination of several NMR methods for two different loadings, 4 water molecules and 18 water molecules per supercage. Information on local dynamics is obtained by H-1 and H-2 NMR spin-lattice relaxation, H-2 NMR solid-echo spectra and H-2 NMR stimulated echo decay curves. The water long range diffusion has been studied by H-1 NMR static field gradient experiments. The most important findings are as follows: The mechanism of water dynamics depends strongly on the degree of loading. This is clearly reflected in both, local and long range motion. The intermediate H-2 NMR spectra might be explained referring to a model proposed by O'Hare et al.: It is based on two different populations of water molecules performing tetrahedral jumps respectively C-2-flips of their OH bonds. Alternative models for the local water dynamics, distorted tetrahedral jumps and a distribution of correlation times, are also discussed."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [FU 308/10]"],["dc.identifier.doi","10.1524/zpch.2012.0301"],["dc.identifier.isi","000313317200003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27468"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Oldenbourg Verlag"],["dc.relation.issn","0942-9352"],["dc.title","NMR Study of Local and Long Range Dynamics of Adsorbed Water in Zeolite NaY(Br)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","9308"],["dc.bibliographiccitation.issue","23"],["dc.bibliographiccitation.journal","Physical Chemistry Chemical Physics"],["dc.bibliographiccitation.lastpage","9314"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Loew, Florian"],["dc.contributor.author","Amann-Winkel, Katrin"],["dc.contributor.author","Loerting, Thomas"],["dc.contributor.author","Fujara, Franz"],["dc.contributor.author","Geil, Burkhard"],["dc.date.accessioned","2018-11-07T09:29:52Z"],["dc.date.available","2018-11-07T09:29:52Z"],["dc.date.issued","2013"],["dc.description.abstract","The postulated glass-liquid transition of low density amorphous ice (LDA) is investigated with deuteron NMR stimulated echo experiments. Such experiments give access to ultra-slow reorientations of water molecules on time scales expected for structural relaxation of glass formers close to the glass-liquid transition temperature. An involved data analysis is necessary to account for signal contributions originating from a gradual crystallization to cubic ice. Even if some ambiguities remain, our findings support the view that pressure amorphized LDA ices are of glassy nature and undergo a glass-liquid transition before crystallization."],["dc.identifier.doi","10.1039/c3cp50818h"],["dc.identifier.isi","000319285000052"],["dc.identifier.pmid","23660938"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10190"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31156"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Royal Soc Chemistry"],["dc.relation.issn","1463-9076"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Ultra-slow dynamics in low density amorphous ice revealed by deuteron NMR: indication of a glass transition"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","16386"],["dc.bibliographiccitation.issue","47"],["dc.bibliographiccitation.journal","Physical Chemistry Chemical Physics"],["dc.bibliographiccitation.lastpage","16391"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Amann-Winkel, Katrin"],["dc.contributor.author","Loew, Florian"],["dc.contributor.author","Handle, Philip H."],["dc.contributor.author","Knoll, Wiebke"],["dc.contributor.author","Peters, Judith"],["dc.contributor.author","Geil, Burkhard"],["dc.contributor.author","Fujara, Franz"],["dc.contributor.author","Loerting, Thomas"],["dc.date.accessioned","2018-11-07T09:14:45Z"],["dc.date.available","2018-11-07T09:14:45Z"],["dc.date.issued","2012"],["dc.description.abstract","Recently, it became clear that relaxation effects in amorphous ices play a very important role that has previously been overlooked. The thermodynamic history of amorphous samples strongly affects their transition behavior. In particular, well-relaxed samples show higher thermal stability, thereby providing a larger window to investigate their glass transitions. We here present neutron scattering experiments using fixed elastic window scans on relaxed forms of amorphous ice, namely expanded high density amorphous ice (eHDA), a variant of low density amorphous ice (LDA-II) and hyperquenched glassy water (HGW). These amorphous ices are expected to be true glassy counterparts of deeply supercooled liquid water, therefore fast precursor dynamics of structural relaxation are expected to appear below the calorimetric glass transition temperature. The Debye-Waller factor shows a very weak sub-T-g anomaly in some of the samples, which might be the signature of such fast precursor dynamics. However, we cannot find this behavior consistently in all samples at all reciprocal length scales of momentum transfer."],["dc.identifier.doi","10.1039/c2cp42797d"],["dc.identifier.isi","000311161700028"],["dc.identifier.pmid","23132426"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10224"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27495"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Royal Soc Chemistry"],["dc.relation.issn","1463-9076"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Limits of metastability in amorphous ices: the neutron scattering Debye-Waller factor"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]