Sensors & Electronics
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
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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- Portable Electrochemical Sensor System (281)
- Preconcentration for Improved Detection (276)
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Contact: Glen Fryxell
