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Chemical Sensors

Preconcentration Material for Heavy Metals (278)

Problem: Need sorbent material that rapidly captures heavy metal ions from solution to allow preconcentration for analysis

Graphic of Thiol Functionalized Monolayer and Functionalized Monolayer with Bound Mercury

Project Activity Scope (from Technical Overview Chart): Mechanisms through Sensors and Devices

PNNL Solution:

  • Nanoengineered sobents based on functionalized nanoporous silica (e.g. Thiol-SAMMS)
  • High monolayer surface coverage (approaching theoretical limits)
  • High affinity for heavy metal ions
  • Fast heavy metal binding kinetics (0.5 ppm to 0.5 ppb; < 5 min)
  • High selective loading capacity for metals (up to 0.64 g/g for Hg)

Capabilities Employed to Meet Client Needs: Material science (including self-assembling monolayers, ceramic materials, etc.); chemistry including surface chemistry and molecular interactions; molecular recognition mechanics; materials processing into specific morphologies (e.g., membranes, thin films, capillaries, etc.); materials characterization.

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Contact: Glen Fryxell

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