TY  - JOUR
A1  - Gurevich, E. L.
A1  - Hergenröder, R.
T1  - Femtosecond laser-induced breakdown spectroscopy: Physics, applications, and perspectives
JF  - Appl. Spectroscopy
Y1  - 2007
SN  - 0003-7028
VL  - 61
SP  - 233A
EP  - 242A
ER  - 
TY  - JOUR
A1  - Khare, K.
A1  - Brinkmann, M.
A1  - Law, B. M.
A1  - Gurevich, E. L.
A1  - Herminghaus, S.
A1  - Seemann, R.
T1  - Dewetting of liquid filaments in wedge-shaped grooves
JF  - Langmuir
N2  - The dewetting of liquid filaments in linear grooves of a triangular cross section is studied experimentally and theoretically. Homogeneous filaments of glassy polystyrene (PS) are prepared in triangular grooves in a nonequilibrium state. At elevated temperatures, the molten PS restores its material contact angle with the substrate. Liquid filaments with a convex liquid-vapor interface decay into isolated droplets with a characteristic spacing depending on the wedge geometry, wettability, and filament width. This instability is driven by the interplay of local filament width and Laplace pressure and constitutes a wide class of ID instabilities that also include the Rayleigh -Plateau instability as a special case. Our results show an accurately exponential buildup of the instability, suggesting that fluctuations have a minor influence in our system.
Y1  - 2007
U6  - http://dx.doi.org/10.1021/la701515u
SN  - 0743-7463
VL  - 23
SP  - 12138
EP  - 12141
ER  - 
TY  - JOUR
A1  - Gurevich, E. L.
A1  - Hergenröder, R.
T1  - A simple laser ICP-MS ablation cell with wash-out time less than 100 ms
JF  - J. An. At. Spectr.
N2  - In this paper a novel concept of ablation cell for laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is presented. Suppression of the turbulence in the flush gas flow in the ablation region reduces the wash-out time of the ablation cell considerably. An ablation chamber which enables ICP-MS pulse duration down to several ten milliseconds has been designed. Dependence of the ICP-MS peak amplitude, width, and shape on the gas flow parameters is studied experimentally for aerosol ablated under laminar and turbulent conditions. Experiments demonstrate that the ICP-MS peak becomes sharper and the amplitude of the signal grows as the turbulence in the ablation cell is suppressed. Furthermore, the possibility of the LA-ICP-MS analysis with a sampling rate of more than 10 Hz has been demonstrated. Express in-depth profiling in the new ablation cell is demonstrated on examples of an Al -Zn multilayer structure and an industrial Mg -Zn coating.
Y1  - 2007
U6  - http://dx.doi.org/10.1039/b704700b
SN  - 0267-9477
VL  - 22
SP  - 1043
EP  - 1050
ER  -