Two-Dimensional Polymers Investigated by Scanning Near-Field Optical Microscopy:  Phase Separation of Polymer Blend Monolayer

2001 ◽  
Vol 105 (20) ◽  
pp. 4558-4564 ◽  
Author(s):  
Hiroyuki Aoki ◽  
Shinzaburo Ito
Keyword(s):  
Phase Separation ◽  
Optical Microscopy ◽  
Polymer Blend ◽  
Near Field ◽  
Two Dimensional

Near-field photoconductivity imaging of a conjugated polymer blend

2001 ◽  
Vol 708 ◽  
Author(s):  
R. Riehn ◽  
R. Stevenson ◽  
J.J.M. Halls ◽  
D.R. Richards ◽  
D.-J. Kang ◽  
...  
Keyword(s):  
Phase Separation ◽  
Chemical Composition ◽  
Optical Microscopy ◽  
Polymer Blend ◽  
Conjugated Polymer ◽  
Near Field ◽  
Absorbed Energy ◽  
Generation Efficiency ◽  
Good Correspondence ◽  
Photocurrent Generation

ABSTRACTWe report combined scanning near-field optical microscopy (SNOM) and near-field photocurrent (NPC) imaging of a binary conjugated polymer blend. We find phase separation on a scale of about 5 μm, with a good correspondence between topographic, fluorescence, and photocurrent images. We excited at 488 nm, a wavelength at which only one of the two polymers absorbs light. Under this illumination regions that are high in the topography image show high luminescence and photocurrent.The photoluminescence (PL) efficiencies in the different regions of the sample were determined by calculating the absorbed energy using the Bethe-Bouwkamp model, and knowledge about the chemical composition of the different phases of the polymer blend. The calculation also allowed us to conclude that the photocurrent generation efficiency (current/absorbed photons) of the different polymer phases is comparable within the limit of confidence of this experiment (±10 %).

Phase-Separation Structure of a Monolayer of Binary Polymer Blend Studied by Fluorescence Scanning Near-Field Optical Microscopy

1999 ◽  
Vol 103 (48) ◽  
pp. 10553-10556 ◽  
Author(s):  
Hiroyuki Aoki ◽  
Yuji Sakurai ◽  
Shinzaburo Ito ◽  
Tatsuo Nakagawa
Keyword(s):  
Phase Separation ◽  
Optical Microscopy ◽  
Polymer Blend ◽  
Near Field ◽  
Binary Polymer

Near-field optical microscopy of two-dimensional photonic and plasmonic crystals

1999 ◽  
Vol 59 (3) ◽  
pp. 2454-2460 ◽  
Author(s):  
Igor I. Smolyaninov ◽  
Walid Atia ◽  
Christopher C. Davis
Keyword(s):  
Optical Microscopy ◽  
Near Field ◽  
Two Dimensional ◽  
Plasmonic Crystals

Composition variation in Al-based dilute nitride alloys using apertureless scanning near-field optical microscopy

2016 ◽  
Vol 18 (44) ◽  
pp. 30546-30553 ◽  
Author(s):  
G. Kolhatkar ◽  
A. Boucherif ◽  
C. Dab ◽  
S. Fafard ◽  
V. Aimez ◽  
...  
Keyword(s):  
Refractive Index ◽  
Phase Separation ◽  
Optical Microscopy ◽  
Near Field ◽  
Dilute Nitride ◽  
Composition Variation ◽  
Nitride Alloys

Using apertureless scanning near-field optical microscopy to map refractive index variations, we study the phase separation in AlGaNAs alloys.

Imaging phase-separated domains in conducting polymer blend films with near-field scanning optical microscopy

2001 ◽  
Vol 40 (22) ◽  
pp. 3737 ◽  
Author(s):  
Jeeseong Hwang ◽  
Lori S. Goldner ◽  
Alamgir Karim ◽  
Connie Gettinger
Keyword(s):  
Optical Microscopy ◽  
Conducting Polymer ◽  
Polymer Blend ◽  
Near Field ◽  
Blend Films ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning
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