TY - JOUR A1 - Sarfraz, Adnan A1 - Schlegel, Moritz-Caspar A1 - Wright, J. A1 - Emmerling, Franziska T1 - Advanced gas hydrate studies at ambient conditions using suspended droplets N2 - We report the spontaneous formation of a clathrate hydrate in a suspended droplet at ambient conditions. A novel method for producing and stabilizing clathrates for analytical studies is described. KW - Clathrates KW - Thermography KW - Acoustic levitator KW - Dichloromethane PY - 2011 DO - https://doi.org/10.1039/c1cc13049h SN - 0022-4936 SN - 1359-7345 VL - 47 IS - 33 SP - 9369 EP - 9371 PB - Royal Society of Chemistry CY - Cambridge AN - OPUS4-24480 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schlegel, Moritz-Caspar A1 - Wenzel, Klaus-Jürgen A1 - Sarfraz, Adnan A1 - Panne, Ulrich A1 - Emmerling, Franziska T1 - A wall-free climate unit for acoustic levitators N2 - Acoustic levitation represents the physical background of trapping a sample in a standing acoustic wave with no contact to the wave generating device. For the last three decades, sample holders based on this effect have been commonly used for contact free handling of samples coupled with a number of analytical techniques. In this study, a wall-free climate unit is presented, which allows the control of the environmental conditions of suspended samples. The insulation is based on a continuous cold/hot gas flow around the sample and thus does not require any additional isolation material. This provides a direct access to the levitated sample and circumvents any influence of the climate unit material to the running analyses. KW - Acoustic levition PY - 2012 DO - https://doi.org/10.1063/1.4705968 SN - 0034-6748 SN - 1089-7623 VL - 83 IS - 5 SP - 055101-1 EP - 055101-3 PB - American Institute of Physics CY - Melville, NY AN - OPUS4-25881 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schlegel, Moritz-Caspar A1 - Sarfraz, Adnan A1 - Müller, Urs A1 - Panne, Ulrich A1 - Emmerling, Franziska T1 - First seconds in a building's life - In situ synchrotron X-ray diffraction study of cement hydration on the millisecond timescale N2 - Setting cement: Highly dynamic hydration processes that occur during the first seconds of cement hydration were studied by time-resolved synchrotron X-ray diffraction. Polycarboxylate ether additives were found to influence the formation of the initial crystalline hydration products on a molecular level. KW - Cement hydration KW - Colloidal suspensions KW - In situ analysis KW - X-ray diffraction KW - SyXRD KW - High resolution KW - In-situ PY - 2012 DO - https://doi.org/10.1002/anie.201200993 SN - 1433-7851 SN - 1521-3773 SN - 0570-0833 VL - 51 IS - 20 SP - 4993 EP - 4996 PB - Wiley-VCH CY - Weinheim AN - OPUS4-26287 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schlegel, Moritz-Caspar A1 - Sarfraz, Adnan A1 - Müller, Urs A1 - Panne, Ulrich A1 - Emmerling, Franziska T1 - Erste Sekunden im Leben eines Bauwerks - In-situ-Synchrotron-Röntgenbeugungsuntersuchungen der Zementhydratation mit Millisekunden-Auflösung N2 - Höchst dynamische Hydratationsprozesse in den ersten Sekunden bei der Entstehung eines Bauwerkes lassen sich mithilfe von Synchrotron-Röntgenbeugung mit einer sehr hohen Zeitauflösung nachverfolgen. Der Schwerpunkt lag dabei auf der Beeinflussung der Bildung erster kristalliner Hydratationsprodukte während des Frühstadiums der Zementhydratation. KW - SyXRD KW - High resolution KW - In-situ KW - Colloidal suspension KW - Cement hydration KW - In-situ-Analyse KW - Kolloidale Suspensionen KW - Röntgenbeugung KW - Zementhydratation PY - 2012 DO - https://doi.org/10.1002/ange.201200993 SN - 0044-8249 SN - 0932-2140 SN - 1521-3757 VL - 124 IS - 20 SP - 5078 EP - 5081 PB - Wiley-VCH CY - Weinheim AN - OPUS4-26284 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -