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Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are:

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Rim-differentiated pillar[5]arene-modified surfaces for rapid PFOA/PFOS detection.

Tu-Nan Gao1, Zhen Yang1,2, Jesse M S Goed1,3

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A novel sensor using rim-differentiated pillar[5]arene on alumina rapidly detects perfluoroalkyl acids like PFOS and PFOA. This method offers sensitive detection down to 10 ng L⁻¹, aiding environmental monitoring efforts.

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Area of Science:

  • Environmental Chemistry
  • Materials Science
  • Analytical Chemistry

Background:

  • Perfluoroalkyl acids (PFAS) are persistent environmental pollutants.
  • Sensitive detection methods for PFAS are crucial for environmental monitoring.
  • Existing methods can be complex and time-consuming.

Purpose of the Study:

  • To develop a novel material for rapid PFAS detection.
  • To immobilize a rim-differentiated pillar[5]arene (RD-P5) onto an alumina surface.
  • To establish a sensitive and efficient method for measuring specific PFAS.

Main Methods:

  • Synthesis and characterization of rim-differentiated pillar[5]arene (RD-P5).
  • Immobilization of RD-P5 onto an Al2O3 surface, creating P5-Al2O3.
  • Detection of perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) using contact angle measurements.

Main Results:

  • Successful synthesis and immobilization of RD-P5 onto Al2O3.
  • The P5-Al2O3 surface demonstrated rapid detection capabilities for PFOS and PFOA.
  • Achieved limits of detection as low as 10 ng L⁻¹ for these PFAS.

Conclusions:

  • The P5-Al2O3 surface represents a promising new platform for PFAS sensing.
  • Contact angle measurements offer a rapid and sensitive approach for PFAS detection.
  • This technology can contribute to improved environmental monitoring of persistent organic pollutants.