Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Immersion transients reveal potential of zero charge of nanoparticle films
AU - Cui, K.
AU - De Feyter, S.
AU - Mertens, S.F.L.
PY - 2012
Y1 - 2012
N2 - We present a simple yet absolute method for the assignment of the zero charge state of metal nanoparticle films during their electrochemical charging. The method is based on measuring the current transient that accompanies the potential controlled immersion of a pristine, ion-free cluster film in an electrolyte, and does not rely on relative quantities such as mass changes of an already immersed film. Therefore, the method is impervious to details of counter ion insertion - for instance whether the electrolyte can partition into the film or not - without which no charging can be observed. Examples of positive and negative ion-limited charging are presented, and an example of ambipolar cluster charging, covering the three possible cases. The immersion method can be readily applied to other cases of coupled electron-ion transfer, as in the three-phase electrochemistry of redox droplets and thin films. © 2012 Elsevier B.V.
AB - We present a simple yet absolute method for the assignment of the zero charge state of metal nanoparticle films during their electrochemical charging. The method is based on measuring the current transient that accompanies the potential controlled immersion of a pristine, ion-free cluster film in an electrolyte, and does not rely on relative quantities such as mass changes of an already immersed film. Therefore, the method is impervious to details of counter ion insertion - for instance whether the electrolyte can partition into the film or not - without which no charging can be observed. Examples of positive and negative ion-limited charging are presented, and an example of ambipolar cluster charging, covering the three possible cases. The immersion method can be readily applied to other cases of coupled electron-ion transfer, as in the three-phase electrochemistry of redox droplets and thin films. © 2012 Elsevier B.V.
KW - Coupled electron-ion transfer
KW - Ionic liquids
KW - Nanoparticles
KW - Thin films
KW - Voltammetry
KW - Ambipolar
KW - Cluster films
KW - Counterions
KW - Current transients
KW - Electrochemical charging
KW - Electron ions
KW - Immersion method
KW - Mass change
KW - Nanoparticle films
KW - Potential controlled
KW - Potential of zero charge
KW - Zero charge
KW - Electrochemistry
KW - Electrolytes
KW - Metallic films
U2 - 10.1016/j.elecom.2012.09.035
DO - 10.1016/j.elecom.2012.09.035
M3 - Journal article
VL - 25
SP - 128
EP - 131
JO - Electrochemistry Communications
JF - Electrochemistry Communications
SN - 1388-2481
IS - 1
ER -