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A Simple Optoelectronic Tongue Discriminates Amino Acids.

Benhua WangJinsong HanChao MaMarkus BenderKai SeehaferAndreas HerrmannUwe H F Bunz
Published in: Chemistry (Weinheim an der Bergstrasse, Germany) (2017)
A self-assembled nine-element optoelectronic tongue consisting of a positively charged water-soluble poly(para-phenyleneethynylene) and three metal ions (Fe2+ , Co2+ , and Cu2+ ) at three different pH values (7, 10, and 13) discriminates all of the 20 natural amino acids in water. Unknown identification was not ideal. Addition of a highly positively charged green fluorescent protein in the presence of Fe2+ , Co2+ , and Cu2+ increased the unknown identification to above 86 %. Linear discriminant analysis (LDA) orders the responses according to the amino acid type, that is, hydrophobic, polar, anionic, or cationic.
Keyphrases
  • amino acid
  • aqueous solution
  • water soluble
  • metal organic framework
  • quantum dots
  • bioinformatics analysis
  • ionic liquid
  • living cells
  • visible light
  • fluorescent probe