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2016 ; 6
(ä): 26840
Nephropedia Template TP
Geng Y
; Noh J
; Drevensek-Olenik I
; Rupp R
; Lenzini G
; Lagerwall JP
Sci Rep
2016[May]; 6
(ä): 26840
PMID27230944
show ga
Monodisperse cholesteric liquid crystal microspheres exhibit spherically
symmetric Bragg reflection, generating, via photonic cross communication,
dynamically tuneable multi-coloured patterns. These patterns, uniquely defined by
the particular sphere arrangement, could render cholesteric microspheres very
useful in countless security applications, as tags to identify and authenticate
their carriers, mainly physical objects or persons. However, the optical quality
of the cholesteric droplets studied so far is unsatisfactory, especially after
polymerisation, a step required for obtaining durable samples that can be used
for object identification. We show that a transition from droplets to shells
solves all key problems, giving rise to sharp patterns and excellent optical
quality even after polymerisation, the polymerised shells sustaining considerable
mechanical deformation. Moreover, we demonstrate that, counter to prior
expectation, cross communication takes place even between non-identical shells.
This opens additional communication channels that add significantly to the
complexity and unique character of the generated patterns.