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- Stephan M Dammer, Haye Hinrichsen
- Physical review. E, Statistical, nonlinear, and…
- 2003

The spreading of infectious diseases with and without immunization of individuals can be modeled by stochastic processes that exhibit a transition between an active phase of epidemic spreading and an absorbing phase, where the disease dies out. In nature, however, the transmitted pathogen may also mutate, weakening the effect of immunization. In order to… (More)

- Shangjiong Yang, Stephan M Dammer, Nicolas Bremond, Harold J W Zandvliet, E Stefan Kooij, Detlef Lohse
- Langmuir : the ACS journal of surfaces and…
- 2007

The aim of this paper is to quantitatively characterize the appearance, stability, density, and shape of surface nanobubbles on hydrophobic surfaces under varying conditions such as temperature and temperature variation, gas type and concentration, surfactants, and surface treatment. The method we adopt is atomic force microscopy (AFM) operated in the… (More)

- Bram M Borkent, Stephan M Dammer, Holger Schönherr, G Julius Vancso, Detlef Lohse
- Physical review letters
- 2007

Shock wave induced cavitation experiments and atomic force microscopy measurements of flat polyamide and hydrophobized silicon surfaces immersed in water are performed. It is shown that surface nanobubbles, present on these surfaces, do not act as nucleation sites for cavitation bubbles, in contrast to the expectation. This implies that surface nanobubbles… (More)

- Stephan M Dammer
- 2002

Equilibrium systems which exhibit a phase transition can be studied by investigating the complex zeros of the partition function. This method, pioneered by Yang and Lee, has been widely used in equilibrium statistical physics. We show that an analogous treatment is possible for a nonequilibrium phase transition into an absorbing state. By investigating the… (More)

- Stephan M Dammer, Detlef Lohse
- Physical review letters
- 2006

Molecular dynamics simulations of Lennard-Jones systems are performed to study the effects of dissolved gas on liquid-wall and liquid-gas interfaces. Gas enrichment at walls, which for hydrophobic walls can exceed more than 2 orders of magnitude when compared to the gas density in the bulk liquid, is observed. As a consequence, the liquid structure close to… (More)

- Stephan M Dammer, Dietrich E Wolf
- Physical review letters
- 2004

The Smoluchowski equation for irreversible aggregation in suspensions of equally charged particles is studied. Accumulation of charges during the aggregation process leads to a crossover from power-law to sublogarithmic cluster growth at a characteristic time and cluster size. For larger times the suspension is usually called stable, although aggregation… (More)

- Stephan M Dammer
- 2001

Applying the theory of Yang-Lee zeros to nonequilibrium critical phenomena, we investigate the properties of a directed bond percolation process for a complex percolation parameter p. It is shown that for the Golden Ratio p = (1± √ 5)/2 and for p = 2 the survival probability of a cluster can be computed exactly. PACS numbers: 02.50.-r,64.60.Ak,05.50.+q… (More)

- J H Werth, D E Wolf, S M Dammer, H A Knudsen, H Hinrichsen
- 2005

In order to control aggregation phenomena in suspensions of nanoparticles, one often charges the particles electrically, e.g. by triboelectric charging. Stabilization of suspensions against aggregation of particles is an important issue, which may be realized by monopolar charging,where particles repel each other. Contrarily, bipolar charging may be used in… (More)

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