title: Observation of single metal nanoparticle collisions by open circuit (mixed) potential changes at an ultramicroelectrode.
abstract: Single nanoparticle (NP) collisions were successfully observed by a potentiometric measurement. The open circuit potential (OCP) of a measuring Au ultramicroelectrode (UME) changes when Pt NPs collide with the UME in a hydrazine solution. The OCP change is related to the redox processes, the concentration of particles, particle size, and electrode size. Compared with the amperometric technique, this approach has several advantages: higher sensitivity, simpler apparatus, fewer problems with NP decomposition, and contamination.
authors: Center for Electrochemistry, Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, Texas 78712, USA.
authors: Hongjun
authors: H
authors: Zhou
authors: Jun Hui
authors: JH
authors: Park
authors: Fu-Ren F
authors: FR
authors: Fan
authors: Allen J
authors: AJ
authors: Bard