Rifat A. M. Hikmet

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The optical properties of one-dimensional gradient-refractive-index lens arrays based on liquid crystals are studied. We find that it is quite possible, using theoretical methods, to predict angular distributions of the light emanating from such arrays when they are illuminated with collimated monochromatic light. We compare four theoretical methods in(More)
Bianca M. I. van der Zande,*,†,‡ Laurent Pagès,‡ Rifat A. M. Hikmet,‡ and Alfons van Blaaderen*,†,§ Van ’t Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute, Utrecht UniVersity, Padualaan 8, 3584 CH Utrecht, The Netherlands, Philips Research Laboratories, Prof. Holstlaan 4, 5656 AA EindhoVen, The Netherlands, and FOM-Institute for Atomic(More)
A new type of disc-shaped molecule (1 a-c) has been synthesised and characterised. The molecules were built up by linking three lipophilic, N-monoacylated 2,2'-bipyridine-3,3'-diamine wedges to a central 1,3,5-benzenetricarbonyl unit. They show liquid crystalline behaviour, as shown by DSC, polarisation microscopy and X-ray diffraction. In all cases the(More)
Stability and thermal quenching is critical for application of quantum dots. In this article we developed a quantum dots in matrix structure, wherein the lattice mismatches between semiconductor crystal layers are optimized to reduce stress thus achieve large volume coating. This structure provides quantum dots with much lower thermal quenching and(More)
In this work we explore a new hydrogel stamp material obtained from polymerizing 2-hydroxyethyl acrylate and poly(ethylene glycol) diacrylate in the presence of water for the microcontact printing of proteins directly on gold substrates and by covalent coupling to self-assembled monolayers of alkanethiols. At high cross-link density, the hydrogel is rigid,(More)
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