Method of detection of volatile organic compounds using liquid crystals that form a blue phase; and device for stabilization and thickness control of liquid crystal films
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United States of America Patent
Stats
-
Jan 9, 2018
Issued Date -
N/A
app pub date -
Dec 16, 2015
filing date -
Dec 19, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Methods and compositions for detecting a targeted analyte, such as volatile organic compound (VOCs), are disclosed. Specifically, a cholesteric liquid crystal composition comprising a nematic liquid crystal and a chiral dopant transitions to a liquid crystal blue phase or undergoes other optical changes when in contact with a sample containing the analyte. The phase transition can be readily detected with the naked eye. The disclosed methods and compositions may be used in, for example, dosimeters for detecting analyte (e.g., VOC) exposure. Methods and compositions for producing arrays of liquid crystal thin films are also disclosed. The surface between the microwells in a microwell array is coated with a liquid-crystal-phobic material, such as a fluorinated polymer or a fluorinated silane, creating isolated microwell domains that are preferentially wetted by liquid crystal. Liquid crystal can be added to the microwell domains by simple techniques such as spin coating.
First Claim
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International Classification(s)
- 2015 Application Filing Year
- C09K Class
- 2848 Applications Filed
- 2073 Patents Issued To-Date
- 72.79 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 7 Citation Count
- C09K Class
- 32.37 % this patent is cited more than
- 7 Age
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