Title: Physical ageing of spreading droplets in a viscous ambient phase

Journal Article · · Scientific Reports
 [1];  [2];  [2];  [2]
  1. Stony Brook Univ., NY (United States); DOE/OSTI
  2. Stony Brook Univ., NY (United States)

In this work, we study the spontaneous spreading of water droplets immersed in oil and report an unexpectedly slow kinetic regime not described by previous spreading models. We can quantitatively describe the observed regime crossover and spreading rate in the late kinetic regime with an analytical model considering the presence of periodic metastable states induced by nanoscale topographic features (characteristic area ~4 nm2, height ~1 nm) observed via atomic force microscopy. The analytical model proposed in this work reveals that certain combinations of droplet volume and nanoscale topographic parameters can significantly hinder or promote wetting processes such as spreading, wicking, and imbibition.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
Fellowship from Joint Photon Sciences Institute at Stony Brook University; National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
SC0012704
OSTI ID:
1624424
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 8; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (36)

Physical aging in plastics and other glassy materials journal March 1977
Studies of the wetting kinetics of liquid drops on solid surfaces journal July 1993
Escape from a metastable state journal January 1986
Hydrodynamics of wetting journal January 1977
Kinetics of displacement journal July 1969
Experiments on a spreading drop and its contact angle on a solid journal March 1988
Edge profiles and dynamic contact angles of a spreading drop journal January 1992
Roughness parameters journal April 2002
The influence of topography on dynamic wetting journal April 2014
The physics of moving wetting lines journal July 2006
The dynamics of the spreading of liquids on a solid surface. Part 1. Viscous flow journal July 1986
Understanding the Early Regime of Drop Spreading journal August 2016
Adsorption of Ellipsoidal Particles at Liquid–Liquid Interfaces journal March 2017
Spreading of nonvolatile liquids in a continuum picture journal February 1991
Contact Angle Relaxation during the Spreading of Partially Wetting Drops journal December 1997
Droplet Spreading:  Partial Wetting Regime Revisited journal March 1999
Universal emulsion stabilization from the arrested adsorption of rough particles at liquid-liquid interfaces journal June 2017
Three-dimensional jamming and flows of soft glassy materials journal January 2010
Physical ageing of the contact line on colloidal particles at liquid interfaces journal December 2011
NIH Image to ImageJ: 25 years of image analysis journal June 2012
Colloidal particle adsorption at liquid interfaces: capillary driven dynamics and thermally activated kinetics journal January 2016
Short time dynamics of viscous drop spreading journal January 2013
The spreading of silicone oil drops on horizontal surfaces journal September 1979
The fluctuation-dissipation theorem journal January 1966
Liquid spreading journal April 1992
First steps in the spreading of a liquid droplet journal January 2004
Slow dynamics and aging in colloidal gels studied by x-ray photon correlation spectroscopy journal July 2007
Dynamics of internal stresses and scaling of strain recovery in an aging colloidal gel journal July 2009
Crossover from shear-driven to thermally activated drainage of liquid-infused microscale capillaries journal October 2016
Role of viscosity coefficients during spreading and coalescence of droplets in liquids journal November 2017
Short-Time Dynamics of Partial Wetting journal June 2008
Viscous to Inertial Crossover in Liquid Drop Coalescence journal March 2011
Colloidal Adsorption at Fluid Interfaces: Regime Crossover from Fast Relaxation to Physical Aging journal July 2013
Colloidal Particle Adsorption at Water-Water Interfaces with Ultralow Interfacial Tension journal May 2018
Topography Driven Spreading journal July 2004
Spreading of Viscous Fluid Drops on a Solid Substrate Assisted by Thermal Fluctuations journal December 2005