Premium
“Nanoions”: Fundamental Properties and Analytical Applications of Charged Nanoparticles
Author(s) -
Bishop Kyle J. M.,
Grzybowski Bartosz A.
Publication year - 2007
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200700349
Subject(s) - nanoscopic scale , nanoparticle , chemical physics , precipitation , nanotechnology , titration , electrostatics , charged particle , chemistry , ion , materials science , inorganic chemistry , physics , organic chemistry , meteorology
Mixtures of oppositely charged nanoparticles (NPs) precipitate sharply only at the point of NP electroneutrality. This behavior—reminiscent of the threshold precipitation of inorganic ions—is specific to the nanoscale and can be attributed to the formation of like‐charged NP clusters stabilized in solution by mutual electrostatic repulsions. NP titrations based on this phenomenon provide a uniquely accurate tool for measuring charges tethered onto nanoscopic objects and for studying the thermodynamics of surface reactions at the nanoscale.