Office for Technology Commercialization

Solid Contact Electrochemical Sensor

Technology #20140304

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Ion Selective ElectrodeElectrochemical Sensor
Philippe Buhlmann, PhD
Professor, Chemistry, College of Science and Engineering
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Andreas Stein, PhD
Professor, Chemistry, College of Science and Engineering
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Managed By
Leza Besemann
Technology Portfolio Manager 612-625-8615
Patent Protection

US Patent Pending 20150338367

Low-cost Ion Selective Electrode with Solid Contact

A new type of solid-contact ion-selective electrode (ISE) introduces low-cost colloid-imprinted mesoporous (CIM) carbon material as the solid contact. The CIM carbon, which is inexpensive and easy to manufacture, acts as an intermediate layer between a gold electrode and an ionophore-doped ISE membrane. The CIM carbon’s open and interconnected pore texture offers significantly higher capacitance than current technology.

MN-IP Try and Buy
  • Up to twelve month trial license
  • Fee is $10,000 for twelve months
  • Fee is waived for MN companies or if sponsoring $50,000+ research with the University
  • No US patent expenses during trial period
  • $15,000 conversion fee (TRY to BUY)
  • Royalty rate of 3% (2% for MN company)
  • Royalty free for first $1M in sales

** View the Term Sheet **
** Contact Kevin Nickels for specific details. **

Electrochemical Sensor Requires Little Calibration

The new sensor requires minimal calibration. This benefit is due to a redox couple incorporated into the ISE, yielding a standard deviation of E° as low as 0.7 mV. In addition, the CIM carbon’s high purity, hydrophobic characteristics and low number of redox-active functional groups give the ISE excellent potential stability and resistance to light, oxygen, carbon dioxide and water interference.


  • Requires minimal calibration
  • Excellent resistance to interference from light, oxygen, carbon dioxide and water
  • Long-term stability and excellent reproducibility
  • Colloid-imprinted mesoporous (CIM) carbon is inexpensive and easy to manufacture
  • Open and interconnected CIM carbon pore structure leads to higher capacitance

Phase of Development - Prototype Development