TY - JOUR
T1 - Colloidal electrostatic interactions near a conducting surface
AU - Polin, Marco
AU - Grier, David G.
AU - Han, Yilong
PY - 2007/10/30
Y1 - 2007/10/30
N2 - Like-charged colloidal spheres dispersed in de-ionized water are supposed to repel each other. Instead, artifact-corrected video microscopy measurements reveal an anomalous long-ranged like-charge attraction in the interparticle pair potential when the spheres are confined to a layer by even a single-charged glass surface. These attractions can be masked by electrostatic repulsions at low ionic strengths. Coating the bounding surfaces with a conducting gold layer suppresses the attraction. These observations suggest a possible mechanism for the anomalous confinement-induced attractions.
AB - Like-charged colloidal spheres dispersed in de-ionized water are supposed to repel each other. Instead, artifact-corrected video microscopy measurements reveal an anomalous long-ranged like-charge attraction in the interparticle pair potential when the spheres are confined to a layer by even a single-charged glass surface. These attractions can be masked by electrostatic repulsions at low ionic strengths. Coating the bounding surfaces with a conducting gold layer suppresses the attraction. These observations suggest a possible mechanism for the anomalous confinement-induced attractions.
UR - http://www.scopus.com/inward/record.url?scp=35649018642&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=35649018642&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.76.041406
DO - 10.1103/PhysRevE.76.041406
M3 - Article
AN - SCOPUS:35649018642
VL - 76
JO - Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
JF - Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
SN - 1063-651X
IS - 4
M1 - 041406
ER -