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Front Cover: Semiconductor nanorod layers aligned through mechanical rubbing (Phys. Status Solidi A 2/2012)
Author(s) -
Amit Yorai,
Faust Adam,
Lieberman Itai,
Yedidya Lior,
Banin Uri
Publication year - 2012
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201290000
Subject(s) - rubbing , nanorod , materials science , stacking , semiconductor , optics , polarization (electrochemistry) , layer (electronics) , optoelectronics , fluorescence , nanotechnology , composite material , chemistry , physics , nuclear magnetic resonance
Colloidal semiconductor nanorods exhibit size tunable polarized emission. A challenge for their utility in optical applications lies in developing means for their assembly and macroscopic alignment. A facile approach for large scaled lateral alignment of CdSe/CdS nanorods was developed, employing the known method of mechanical rubbing: see the Editor's Choice article by Yorai Amit et al. in this issue on pp. 235–242 . The resulting samples exhibited polarized fluorescent emission with good contrast ratio and the polarized nature of the rubbed samples is seen (bottom right image). Fluorescence microscopy images (top right), along with the corresponding polarization contrast‐ratio color map (top left), show the underlying pattern of the aligned layer caused by the rubbing process leading to a topography which resembles that of a plowed field. The interaction with the rubbing fibers turns an initially smooth surface into a parallel pattern of longitudinal lines leading to the stacking and reorientation of the nanorods resulting in a polarized emitting sample.