Results 241 to 250 of about 1,241,175 (302)

A molecular dynamics study of surface wettability effects on heterogeneous bubble nucleation

, 2020
In this paper, the bubble nucleation on ideally smooth surfaces with different wettabilities is investigated by molecular dynamics simulations. Nucleation is induced by raising temperature of solid surface to 160 K while removing the thermostat of the ...
Yang Li, Wenjing Zhou, Yonghai Zhang, Baojin Qi, Jinjia Wei   +4 more
semanticscholar   +1 more source

Heterogeneous Nucleation of Nitrogen

2007
Homogeneous and heterogeneous vapor–liquid nucleation experiments of nitrogen are carried out using a cryogenic nucleation pulse chamber. For the latter water ice crystals are used as heterogeneous seeds. The onset of nucleation is detected by constant angle Mie scattering at pressures from 2 to 25 kPa and temperatures from 50 to 70 K.
Guram Chkonia, Jan Wedekind, Reinhard Strey, Judith Wölk   +3 more
openaire   +1 more source

Numerical Investigation of Nucleating-Agent-Enhanced Heterogeneous Nucleation

Industrial & Engineering Chemistry Research, 2010
Nucleating agents have long been employed in polymeric foaming processes to promote cell nucleation, increase cell density, and improve cell uniformity. This improvement in foam morphology is usually considered to result from the enhanced heterogeneous nucleation caused by the lower free energy barrier for cell nucleation.
C. Wang, S. N. Leung, M. Bussmann, W. T. Zhai, C. B. Park   +4 more
openaire   +1 more source

Impact of Hydroxyl Groups Boosting Heterogeneous Nucleation on Perovskite Grains and Photovoltaic Performances

Journal of Physical Chemistry C, 2018
Surface energy is a key factor in controlling the kinetics of nucleation and growth of perovskite, which are crucial for the formation of high quality films and the photovoltaic efficiency of solar...
Hyebin Kim, Jungyun Hong, Chaewon Kim, Eul‐Yong Shin, Mijung Lee, Yong‐Young Noh, Byoungchoo Park, I. Hwang   +7 more
semanticscholar   +1 more source

Soluble-Insoluble Transition in Binary Heterogeneous Nucleation

Physical Review Letters, 2001
In this Letter, we report the first experimental study of binary heterogeneous gas-liquid nucleation. Onset activities were obtained for nucleation of various n-propanol-water vapor mixtures on 6.9 nm NaCl particles soluble in water and practically insoluble in n-propanol.
Petersen, Denisa, Ortner, R, Vrtala, Aron, Wagner, Paul, Kulmala, Markku, Laaksonen, Ari   +5 more
openaire   +2 more sources

Kinetics of Heterogeneous Nucleation

The Journal of Chemical Physics, 1950
Consider a phase transition α⇄β. Stable β-embryos can be retained in the temperature range of α-stability in cavities of suitable extraneous solids present in the system. Retained β-embryos may nucleate the α→β-transformation in the range of β-stability. Using these concepts a theory for the effect of thermal history upon the kinetics of
openaire   +1 more source

Heterogeneous nucleation in photosensitive glasses

Journal of Non-Crystalline Solids, 1997
Abstract Time-temperature dependencies of the nucleation rates for lithium disilicate glasses containing impurities of Au, Ag and Pt were investigated. The absolute values of nucleation rate for lithium disilicate were determined, as were values of activation enthalpy of structural unit transitions from glass to crystal and those of glass viscous ...
A.M. Kalinina, V.N. Filipovich, G.A. Sycheva   +2 more
openaire   +1 more source

Heterogeneous Nucleation With Artificial Cavities

Heat Transfer: Volume 2, 2005
Bubble incipience in artificial cavities manufactured from silicon has been studied using gas nucleation and pool boiling. Moderately wetting water and highly wetting ethanol have both been used as the bulk fluid with cylindrical cavities, as well as those with a triangle, square, and rectangle shape cross section.
Yusen Qi, James F. Klausner
openaire   +1 more source

Heterogeneous nucleation in solidifying metals

Acta Metallurgica, 1978
Abstract Heterogeneous nucleation experiments have been carried out using alloy droplets contained in a nucleant matrix. These specimens were made using a simple casting and annealing treatment of selected alloys. Thermal analysis was used to detect the nucleation in the alloy droplets. The results obtained show that this method was capable of giving
Solthin R.T., Chadwick G.A.
openaire   +2 more sources

Heterogeneous nucleation of protein crystals

Acta Crystallographica Section A: Foundations and Advances, 2022
E. Saridakis
semanticscholar   +1 more source