TY - JOUR
T1 - Transient three-dimensional orientation of molecular ions in an ordered polyelectrolyte membrane
AU - Reznik, Carmen
AU - Berg, Rosalie
AU - Foster, Ed
AU - Advincula, Rigoberto
AU - Landes, Christy F.
PY - 2011/3/17
Y1 - 2011/3/17
N2 - Single-molecule fluorescence spectroscopy is employed to reveal 3D details of the mechanisms underpinning ion transport in a polyelectrolyte thin film possessing polymer-brush nanoscale order. The ability to resolve fluorescence emission over three discrete polarization angles reveals that these ordered materials impart 3D orientation to charged, diffusing molecules. The experiments, supported by simulations, report global orientation parameters for molecular transport, track dipole angle progressions over time, and identify a unique transport mechanism: translational diffusion with restricted rotation. In general, realization of this experimental method for translational diffusion in systems exhibiting basic orientation should lend itself to evaluation of transport in a variety of important, ordered, functional materials.
AB - Single-molecule fluorescence spectroscopy is employed to reveal 3D details of the mechanisms underpinning ion transport in a polyelectrolyte thin film possessing polymer-brush nanoscale order. The ability to resolve fluorescence emission over three discrete polarization angles reveals that these ordered materials impart 3D orientation to charged, diffusing molecules. The experiments, supported by simulations, report global orientation parameters for molecular transport, track dipole angle progressions over time, and identify a unique transport mechanism: translational diffusion with restricted rotation. In general, realization of this experimental method for translational diffusion in systems exhibiting basic orientation should lend itself to evaluation of transport in a variety of important, ordered, functional materials.
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U2 - 10.1021/jz200065f
DO - 10.1021/jz200065f
M3 - Article
AN - SCOPUS:79952792717
SN - 1948-7185
VL - 2
SP - 592
EP - 598
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 6
ER -