Synthesis of Colloidal Photonic Crystals with High Nonlinear Optical Performance: Towards Efficient Second‐Harmonic Generation with Centrosymmetric Structures
Source abstract
Abstract
Chemically modified colloidal photonic crystals with high nonlinear optical performance have been prepared by a novel, very efficient solid-phase based synthesis, opening up a new field of nonlinear optical second-harmonic Generation with centrosymmetric organic structures (see figure).
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Photonic Crystals and Applications · Nonlinear Optical Materials Studies · Fern and Epiphyte Biology
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (25)
Show source-provided references
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22. We have systematically used the colorimetric method to calculate the reaction yield because its easiness and sufficient accuracy for our purposes. The conductimetric titration of the free carboxylate groups other possible way to determine the yield of the esterification reaction is not applicable in our case because the molecules of linkedCVhave a positive charge and the corresponding counter‐ion chloride; this last ion can be displaced totally or partially in the role of neutralize the positive charge by the remaining carboxylate or sulfate groups in the surface of the spheres. Furthermore the hydroxyl groups of the base used in the titration can attack in some extent to the positively charged carbon atom in a well known reaction destroying the NLO dye. This last reaction is not as fast as an acid‐base one but it can be enough to introduce an indeterminate factor of inexactitude. The variation of the elemental composition from the commercial toCVlatex is lower that the usually accepted experimental error making impossible the determination of the yield by means of this accurate traditional method.
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24. See Supporting Information: picture of the diffraction pattern of one of the prepared colloidal photonic crystals.
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