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N o v e m b e r 1 2 - 1 3 , 2 0 1 8 | R o m e , I t a l y
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alliedacademies.comYEARS
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CHROMATOGRAPHY AND SEPARATION SCIENCE
World Congress on
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International Conference and Exhibition on
Chromatography 2018 & Satellite 2018
Journal of Chemical Technology and Applications
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Volume 2
J Chem Tech App 2018, Volume 2
NOVEL APPROACH TO PREPARE HIGH QUALITY PHOTONIC CRYSTALS
FOR SEPARATION USAGE
CHEN Yi
University of Chinese Academy of Sicences, China
P
hotonic crystals (PCs) have ordered structure with optical band gap at the visible range or crystal lattice at the size of several
hundreds of nano meters. PCs assembled from particles can offer pass-through nano-pores which, in theory, readily produce
ultra-high performance of separation. Unfortunately, in practice their real applications were limited to the separation of a few
compositions because they are hard to prepare unless highly mono-disperse nanopartciles are used that take time to prepare
and cost high. In fact, mono-disperse particles do not necessarily uniformly order inside the assembled PCs but often separate
into various domains. The domain borders can destroy the separation efficiency and easily cause clasps of PC-packed columns.
Herein we present a novel approach to assemble PCs from polydisperse particles which are easily synthesized in a normal lab-
oratory at a very low cost. The obtained PCs were measured to have sharp band gaps. They can be shaken in disarray but soon
recover their ordered structure after settling for about decade seconds. Such a type of PCs can thus be made into various shapes
so that they can be used to write iridescent letters, to paint colorful pictures, and of cause to fill capillary columns. The PC-filled
capillary columns have been shown to yield fast (in seconds) and high separation efficiency in electro-chromatographic studies.