Zobrazeno 1 - 10
of 518
pro vyhledávání: '"Butt, Hans Juergen"'
Publikováno v:
J. Chem. Phys. 159, 150402 (2023)
Wetting phenomena are widespread in both natural and technological contexts. Despite the well-established nature of this scientific field and our extensive knowledge of its underlying principles, wetting remains a dynamic and vibrant area of study. I
Externí odkaz:
http://arxiv.org/abs/2401.17853
Autor:
Li, Shuai, Lam, Cheuk Wing Edmond, Donati, Matteo, Regulagadda, Kartik, Yavuz, Emre, Pfeiffer, Till, Sarkiris, Panagiotis, Gogolides, Evangelos, Milionis, Athanasios, Poulikakos, Dimos, Butt, Hans-Jürgen, Kappl, Michael
Heat exchangers are made of metals because of their high heat conductivity and mechanical stability. Metal surfaces are inherently hydrophilic, leading to inefficient filmwise condensation. It is still a challenge to coat these metal surfaces with a
Externí odkaz:
http://arxiv.org/abs/2311.13353
Autor:
Pfeiffer, Till, Li, Shuai, Kappl, Michael, Butt, Hans-Jürgen, Stephan, Peter, Gambaryan-Roisman, Tatiana
Modification of surfaces to enable dropwise condensation is a promising approach for achieving high condensation rates. In this work, we present an experimental study on condensation of water on copper surfaces coated with an ultrathin, 5 nm - 10 nm
Externí odkaz:
http://arxiv.org/abs/2311.09143
Autor:
Ratschow, Aaron D., Bauer, Lisa S., Bista, Pravash, Weber, Stefan A. L., Butt, Hans-Jürgen, Hardt, Steffen
Charge separation at moving three-phase contact lines is observed in nature as well as technological processes. Despite the growing number of experimental investigations in recent years, the physical mechanism behind the charging remains obscure. Her
Externí odkaz:
http://arxiv.org/abs/2305.02172
Publikováno v:
Phys. Rev. Lett. 131, 228201 (2023)
Slide electrification - the spontaneous charge separation by sliding water drops - can lead to an electrostatic potential of 1 kV and change drop motion substantially. To find out, how slide electrification influences the contact angles of moving dro
Externí odkaz:
http://arxiv.org/abs/2304.13461
Slide electrification is a spontaneous charge separation between a surface and a sliding drop. Here, we describe this effect in terms of a voltage generated at the three-phase contact line. This voltage moves charges between capacitors, one formed by
Externí odkaz:
http://arxiv.org/abs/2202.03948
Autor:
Vogel, Peter, Möller, Nadir, Qaisrani, Muhammad Nawaz, Bista, Pravash, Weber, Stefan, Butt, Hans-Jürgen, Liebchen, Benno, Sulpizi, Marialore, Palberg, Thomas
Publikováno v:
J. Am. Chem. Soc. 144 21080-21087 (2022)
The charge state of dielectric surfaces in aqueous environments is of fundamental and technological importance. Here, we study the influence of dissolved molecular CO$_2$ on the charging of three, chemically different surfaces (SiO$_2$, Polystyrene,
Externí odkaz:
http://arxiv.org/abs/2201.11029
Autor:
Sharma, Chander Shekhar, Milionis, Athanasios, Naga, Abhinav, Lam, Cheuk Wing Edmond, Rodriguez, Gabriel, Del Ponte, Marco Francesco, Negri, Valentina, Raoul, Hopf, D'Acunzi, Maria, Butt, Hans-Jürgen, Vollmer, Doris, Poulikakos, Dimos
Publikováno v:
Adv. Funct. Mater. 2022, 32, 2109633
Soft substrates such as polydimethylsiloxane (PDMS) enhance droplet nucleation during the condensation of water vapour, because their deformability inherently reduces the energetic threshold for heterogeneous nucleation relative to rigid substrates.
Externí odkaz:
http://arxiv.org/abs/2108.12002
Autor:
Straub, Benedikt B., Schmidt, Henrik, Rostami, Peyman, Henrich, Franziska, Rossi, Massimiliano, Kähler, Christian J., Butt, Hans-Jürgen, Auernhammer, Günter K.
The dynamics of wetting and dewetting is largely determined by the velocity field near the contact lines. For water drops it has been observed that adding surfactant decreases the dynamic receding contact angle even at a concentration much lower than
Externí odkaz:
http://arxiv.org/abs/2105.12365
Publikováno v:
Phys. Chem. Chem. Phys., 2021,23, 16754-16766
Responsive poly-N-isopropylacrylamide-based microgels are commonly used as model colloids with soft repulsive interactions. It has been shown that the microgel-microgel interaction in solution can be easily adjusted by varying the environmental param
Externí odkaz:
http://arxiv.org/abs/2105.04945