Title: Ultrasound-based formation of nano-Pickering emulsions investigated via in-situ SAXS

Journal Article · · Journal of Colloid and Interface Science
 [1];  [1];  [2];  [2];  [1];  [1];  [1]
  1. Univ. of Washington, Seattle, WA (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)

We report that sonication is one of the most commonly used methods to synthesize Pickering emulsions. Yet, the process of emulsion sonication is rarely characterized in detail and acoustic conditions are largely determined by experimenter's personal experience. In this study, the role of sonication in the formation of Pickering emulsions from amphiphilic gold nanoparticles was investigated using a new sample environment combining ultrasound delivery with ultra-small-angle X-ray scattering (USAXS) measurements. The detection of acoustic cavitation and the simultaneous analysis of structural data via USAXS demonstrated direct correlation between Pickering emulsion formation and cavitation events. There was no evidence of spontaneous adsorption of particles onto the oil-water interface without ultrasound, which suggests the presence of a stabilizing force. Acoustically detected cavitation events could originate in the bulk solvent and/or inside the emulsion droplets. Lastly, these events helped overcome energy barriers to induce particle adsorption.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Institutes of Health (NIH); Petroleum Research Fund (PRF); USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1493883
Journal Information:
Journal of Colloid and Interface Science, Journal Name: Journal of Colloid and Interface Science Journal Issue: C Vol. 536; ISSN 0021-9797
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (50)

Zerstreuung von Röntgenstrahlen journal January 1915
Recent Studies of Pickering Emulsions: Particles Make the Difference journal June 2016
Glassy Carbon as an Absolute Intensity Calibration Standard for Small-Angle Scattering journal August 2009
Emulsions stabilised solely by colloidal particles journal February 2003
Ultrasound-mediated cavitation thresholds of liquid perfluorocarbon droplets in vitro journal September 2003
High pressure emulsification with nano-particles as stabilizing agents journal May 2010
On the thermodynamics and kinetics of superheated fluorocarbon phase-change agents journal November 2016
Nano-emulsions journal October 2005
Preparation of Janus colloidal particles via Pickering emulsion: An overview journal December 2013
Emulsions stabilized with solid nanoparticles: Pickering emulsions journal December 2013
Preparation of highly uniform Pickering emulsions by mercaptocarboxylated gold nanoparticles journal September 2013
Phenols, proanthocyanidins, flavones and flavonols in some plant materials and their antioxidant activities journal February 2005
Nanoparticle adsorption and stabilisation of surfactant-free emulsions journal September 2006
Internally structured pickering emulsions stabilized by clay mineral particles journal May 2009
Small angle scattering model for Pickering emulsions and raspberry particles journal March 2010
Nanoparticles at fluid interfaces: Exploiting capping ligands to control adsorption, stability and dynamics journal December 2012
Sono-photoacoustic imaging of gold nanoemulsions: Part I. Exposure thresholds journal March 2015
Sono-photoacoustic imaging of gold nanoemulsions: Part II. Real time imaging journal March 2015
Developing recyclable pH-responsive magnetic nanoparticles for oil–water separation journal August 2015
Emulsification by high frequency ultrasound using piezoelectric transducer: Formation and stability of emulsifier free emulsion journal May 2014
Polypyrrole-Coated Perfluorocarbon Nanoemulsions as a Sono-Photoacoustic Contrast Agent journal September 2017
Spontaneously organized molecular assemblies. 4. Structural characterization of n-alkyl thiol monolayers on gold by optical ellipsometry, infrared spectroscopy, and electrochemistry journal June 1987
Solid Wettability from Surface Energy Components: Relevance to Pickering Emulsions journal February 2002
Hydrophilic Silica Nanoparticles at the PDMS Droplet−Water Interface journal April 2003
Growth of Gold Nanoparticle Films Driven by the Coalescence of Particle-Stabilized Emulsion Drops journal April 2006
SANS and SAXS Analysis of Charged Nanoparticle Adsorption at Oil–Water Interfaces journal January 2012
Pickering Emulsions Stabilized by Nanoparticle Surfactants journal August 2012
Thermodynamically Stable Emulsions Using Janus Dumbbells as Colloid Surfactants journal October 2013
Confinement Free Energy of Surfaces Bearing End-Grafted Polymers in the Mushroom Regime and Local Measurement of the Polymer Density journal November 2007
Controlled Nucleation for the Regulation of the Particle Size in Monodisperse Gold Suspensions journal January 1973
Stimuli-responsive Pickering emulsions: recent advances and potential applications journal January 2015
Sonocrystallization of conjugated polymers with ultrasound fields journal January 2018
A small-angle scattering environment for in situ ultrasound studies journal January 2018
CXCVI.—Emulsions journal January 1907
Aqueous foams stabilized solely by particles journal January 2011
Scalable synthesis of self-assembling nanoparticle clusters based on controlled steric interactions journal January 2011
Quiescent water-in-oil Pickering emulsions as a route toward healthier fruit juice infused chocolate confectionary journal January 2012
In vitro characterization of perfluorocarbon droplets for focused ultrasound therapy journal August 2010
Phase change events of volatile liquid perfluorocarbon contrast agents produce unique acoustic signatures journal December 2013
Metal Nanoparticle Gratings: Influence of Dipolar Particle Interaction on the Plasmon Resonance journal May 2000
Irena : tool suite for modeling and analysis of small-angle scattering journal February 2009
Development of combined microstructure and structure characterization facility for in situ and operando studies at the Advanced Photon Source journal June 2018
The role of inertial cavitation in acoustic droplet vaporization journal May 2009
Interparticle collisions driven by ultrasound journal March 1990
The Temperature of Cavitation journal September 1991
Pickering Emulsions for Food Applications: Background, Trends, and Challenges journal April 2015
Laser-induced cavitation in nanoemulsion with gold nanospheres for blood clot disruption: in vitro results journal January 2014
Melatonin-based pickering emulsion for skin's photoprotection journal August 2014
Pickering Particles Prepared from Food Waste journal September 2016
Phase-Change Nanoparticles Using Highly Volatile Perfluorocarbons: Toward a Platform for Extravascular Ultrasound Imaging journal January 2012

Cited By (4)

Stabilization of Pickering Emulsions by Hairy Nanoparticles Bearing Polyanions journal May 2019
Multiple nanoemulsions journal January 2020
Ultrasound control of oil-in-oil Pickering emulsions preparation journal December 2019
Stabilization of Pickering Emulsions by Hairy Nanoparticles Bearing Polyanions journal May 2019