Document Detail

Plasticized poly(vinyl chloride)-based photonic crystal for ion sensing.
MedLine Citation:
PMID:  25397688     Owner:  NLM     Status:  Publisher    
In this study, we, for the first time, developed a plasticized poly (vinyl chloride) (PVC)-based two-dimensional photonic crystal (2D-PhC) optical sensor using nanoimprint lithography (NIL), which can perform highly-sensitive, fast, and selective ion sensing based on ion extraction. Concerning the principle of response, present plasticized PVC-based PhC works as a waveguide and a grating. Incident light was guided in the bulk of plasticized PVC, then, guided light of specific wavelength was diffracted by periodic nanostructure. The guided and diffracted light intensity changes of PVC-based PhCs possessing various thicknesses were monitored at 580 nm, then we found that the 0.35 m-thick PhC film exhibited the highest diffraction intensity. For the ion-sensing application, potassium-selective sensing elements involving potassium ionophore and lipophilic dye were dissolved in a plasticized PVC-based PhC, and the K+-selective response was successfully observed by monitoring the diffracted peak intensity change. Present 2D-PhC optical sensor exhibited a fast response within 5 seconds (95 % response time) due to the use of thin film, and sensitivity was 20 times higher than that of a PVC plane-film optical sensor, due to efficient collection of diffracted light by employing periodic nanostructure of photonic crystal.
Shoma Aki; Tatsuro Endo; Kenji Sueyoshi; Hideaki Hisamoto
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-11-14
Journal Detail:
Title:  Analytical chemistry     Volume:  -     ISSN:  1520-6882     ISO Abbreviation:  Anal. Chem.     Publication Date:  2014 Nov 
Date Detail:
Created Date:  2014-11-14     Completed Date:  -     Revised Date:  2014-11-15    
Medline Journal Info:
Nlm Unique ID:  0370536     Medline TA:  Anal Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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