Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 18, Issue 2, Pages 212-221Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.200701327
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We demonstrate that alkylthiol-capped gold nanoclusters doped into nematic liquid crystals (N-LCs) with positive dielectric an-isotropy give rise to an unprecedented dual alignment mode and electro-optical response, which has a potential impact on current liquid crystal (LC) display technologies and N-LC optical-biosensor design. By fine-tuning experimental conditions (temperature, electric field, and alignment), N-LCs doped with gold nanoclusters can be aligned and electrically reoriented either like N-LCs with a positive dielectric anisotropy in a planar cell or, alternatively, as N-LCs with a negative dielectric anisotropy in a homeotropic cell, both at lower threshold voltages than the pure N-LC.
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