TY - JOUR

T1 - Preparation of Silver Nanoparticles in a Water-in-Oil Microemulsion Stabilized by Ecosurf EH3 and Determination of Their Electrophoretic Mobility

AU - Popovetskiy, Pavel S.

AU - Petrochenko, Sofia A.

N1 - This research was funded by the Russian Science Foundation (22-73-00144).

PY - 2024/11/22

Y1 - 2024/11/22

N2 - This work describes a study on the electrophoresis of silver nanoparticles in reverse microemulsions with varying water content. The microemulsion was stabilized using a nonionic ethoxylated surfactant, 2-ethylhexanol triethoxylate (Ecosurf EH3). This study represents the second example of electrophoresis research conducted in media with a low dielectric constant for etoxylated surfactants. The study also determined the boundaries of thermodynamic stability and the conditions required to obtain nanoparticles with a high yield. The hydrodynamic diameter and electrophoretic mobility of nanoparticles were measured using dynamic light scattering and laser Doppler electrophoresis. The study determined the boundary conditions for applying these methods to laser-absorbing samples. The electrophoretic mobility of nanoparticles was found to be dependent on the fraction of water in the range of 2–5% vol. (equivalent to a metal content of 10–25 mM), as determined by electrophoresis in a free medium. The increase in volume fraction of water leads to agglomeration of micelles, which causes a decrease in the electrokinetic potential of nanoparticles, likely due to the blurring of the diffuse part of the electrical double layer.

AB - This work describes a study on the electrophoresis of silver nanoparticles in reverse microemulsions with varying water content. The microemulsion was stabilized using a nonionic ethoxylated surfactant, 2-ethylhexanol triethoxylate (Ecosurf EH3). This study represents the second example of electrophoresis research conducted in media with a low dielectric constant for etoxylated surfactants. The study also determined the boundaries of thermodynamic stability and the conditions required to obtain nanoparticles with a high yield. The hydrodynamic diameter and electrophoretic mobility of nanoparticles were measured using dynamic light scattering and laser Doppler electrophoresis. The study determined the boundary conditions for applying these methods to laser-absorbing samples. The electrophoretic mobility of nanoparticles was found to be dependent on the fraction of water in the range of 2–5% vol. (equivalent to a metal content of 10–25 mM), as determined by electrophoresis in a free medium. The increase in volume fraction of water leads to agglomeration of micelles, which causes a decrease in the electrokinetic potential of nanoparticles, likely due to the blurring of the diffuse part of the electrical double layer.

KW - charge stabilization in nonpolar media

KW - microemulsions

KW - nanoparticles

KW - nonaqueous electrophoresis

KW - surfactants

KW - Metal Nanoparticles/chemistry

KW - Emulsions/chemistry

KW - Water/chemistry

KW - Oils/chemistry

KW - Silver/chemistry

KW - Particle Size

KW - Hexanols/chemistry

KW - Surface-Active Agents/chemistry

KW - Electrophoresis/methods

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85208231481&origin=inward&txGid=75542e021bcd995d32a64734637847c6

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:001354632000001

UR - https://www.mendeley.com/catalogue/c8f56305-fc71-378e-b90f-1f737d39f586/

U2 - 10.1002/elps.202400200

DO - 10.1002/elps.202400200

M3 - Article

C2 - 39508200

VL - 45

SP - 1955

EP - 1962

JO - Electrophoresis

JF - Electrophoresis

SN - 0173-0835

IS - 21-22

ER -