TY  - JOUR
A1  - Holland-Moritz, Henry
A1  - Graupner, Julia
A1  - Möller, Wolfhard
A1  - Pacholski, Claudia
A1  - Ronning, Carsten
T1  - Dynamics of nanoparticle morphology under low energy ion irradiation
JF  - Nanotechnology
N2  - If nanostructures are irradiated with energetic ions, the mechanism of sputtering becomes important when the ion range matches about the size of the nanoparticle. Gold nanoparticles with diameters of similar to 50 nm on top of silicon substrates with a native oxide layer were irradiated by gallium ions with energies ranging from 1 to 30 keV in a focused ion beam system. High resolution in situ scanning electron microscopy imaging permits detailed insights in the dynamics of the morphology change and sputter yield. Compared to bulk-like structures or thin films, a pronounced shaping and enhanced sputtering in the nanostructures occurs, which enables a specific shaping of these structures using ion beams. This effect depends on the ratio of nanoparticle size and ion energy. In the investigated energy regime, the sputter yield increases at increasing ion energy and shows a distinct dependence on the nanoparticle size. The experimental findings are directly compared to Monte Carlo simulations obtained from iradina and TRI3DYN, where the latter takes into account dynamic morphological and compositional changes of the target.
KW  - ion beam
KW  - nanoparticles
KW  - sputtering
KW  - Monte Carlo
KW  - in situ
Y1  - 2018
U6  - https://doi.org/10.1088/1361-6528/aac36c
SN  - 0957-4484
SN  - 1361-6528
VL  - 29
IS  - 31
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  - 
TY  - JOUR
A1  - Akuoko Duah, Reginald
T1  - Exhaustive Focus Marking in Akan
JF  - Interdisciplinary studies on information structure : ISIS ; working papers of the SFB 632
N2  - This paper reopens the discussion on focus marking in Akan (Kwa,
Niger-Congo) by examining the semantics of the so-called focus marker
in the language. It is shown that the so-called focus marker expresses
exhaustivity when it occurs in a sentence with narrow focus. The study
employs four standard tests for exhaustivity proposed in the literature
to examine the semantics of Akan focus constructions (Szabolsci 1981,
1994; É. Kiss 1998; Hartmann and Zimmermann 2007). It is shown that
although a focused entity with the so-called focus marker nà is
interpreted to mean ‘only X and nothing/nobody else,’ this meaning
appears to be pragmatic.
KW  - Akan
KW  - focus marker
KW  - cleft
KW  - exhaustivity
KW  - ex situ
KW  - in situ
KW  - subject/non-subject asymmetry
Y1  - 2015
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-83748
SN  - 1614-4708
SN  - 1866-4725
IS  - 19
SP  - 1
EP  - 28
PB  - Universitätsverlag Potsdam
CY  - Potsdam
ER  -