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High-resolution imaging of local oxidation in polyfluorene thin films by nonlinear near-field microscopy
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10.1063/1.2805214
/content/aip/journal/apl/91/19/10.1063/1.2805214
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/19/10.1063/1.2805214
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Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Absorption spectrum (colored arrows indicate the wavelength of our excitation lines for 1PL and 2PL), (b) normalized 1PL spectrum for excitation and 2PL spectrum for , pulse excitation (left inset: structure of a pure PFO unit; right inset: structure of a keto-defect unit).

Image of FIG. 2.
FIG. 2.

(Color online) SNOM maps from the PFO-PMMA blend: (a) topography, (b) 1PL map excited at , (c) 1PL map excited at , and (d) 2PL map excited with , pulses.

Image of FIG. 3.
FIG. 3.

(Color online) Zoom on the same feature extracted from (a) the green-excited 1PL map [Fig. 2(c)] and from (b) the 2PL map [Fig. 2(d)]. In panel (c) line profiles from the two images [open circles from (a), full circles from (b)] show further evidence of the sensitivity improvement obtained with two-photon excitation. Solid lines are plotted as a guide for the eye.

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/content/aip/journal/apl/91/19/10.1063/1.2805214
2007-11-08
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: High-resolution imaging of local oxidation in polyfluorene thin films by nonlinear near-field microscopy
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/19/10.1063/1.2805214
10.1063/1.2805214
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