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Chemical Sensors

Preconcentration for Improved Detection (276)

Problem: Need rapid method with good sensitivity, selectivity, and dynamic range to measure metal ion concentrations in solution

Graphic of Integrated Capture and Detection Cell

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

PNNL Solution:

  • Obtain desired selectivity with a two stage approach
    1. Chemical selectivity of the nanoporous sorbent phase
    2. Electrochemical detection of the analyte (e.g. stripping voltammetry)
  • Response is linear to concentration (ppb sensitivity)
  • Enables practical sensor develop that can be adapted for different ions

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: Yuehe Lin

High-Performance Preconcentrator Materials (277)

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