Like-charge interactions between colloidal particles are asymmetric with respect to sign.
Soft Matter
; 5(9): 1931-1936, 2009 May 07.
Article
in En
| MEDLINE
| ID: mdl-25221611
ABSTRACT
Two-dimensional dispersions of colloidal particles with a range of surface chemistries and electrostatic potentials are characterized under a series of solution ionic strengths. A combination of optical imaging techniques are employed to monitor both the colloid structure and the electrostatic surface potential of individual particles in situ. We find that like-charge multiparticle interactions can be tuned from exclusively repulsive to long-range attractive by changing the particle surface composition. This behavior is strongly asymmetric with respect to the sign of the surface potential. Collective long-range attractive interactions are only observed among negatively charged particles.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Soft Matter
Year:
2009
Document type:
Article
Affiliation country:
United States
Publication country:
ENGLAND
/
ESCOCIA
/
GB
/
GREAT BRITAIN
/
INGLATERRA
/
REINO UNIDO
/
SCOTLAND
/
UK
/
UNITED KINGDOM