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Might silicon surface be used for electronic tongue application?
S V Litvinenko1, D Bielobrov, V Lysenko
1Institute of High Technologies, Taras Shevchenko National University of Kyiv , 60 Volodimirska Street, 01033 Kiev, Ukraine.
ACS Applied Materials & Interfaces
|October 22, 2014
Summary
This study introduces an electronic tongue using silicon
Area of Science:
- Materials Science
- Sensor Technology
- Analytical Chemistry
Background:
- Traditional chemical sensing methods can be complex and time-consuming.
- Developing novel, rapid, and reliable sensing platforms is crucial for various applications.
- Silicon-based sensors offer potential due to their established semiconductor properties.
Purpose of the Study:
- To develop a novel electronic tongue sensor.
- To utilize the intrinsic properties of silicon for liquid analysis.
- To demonstrate the sensor's capability in distinguishing different liquid samples.
Main Methods:
- Fabrication of a silicon-based sensor.
- 2D mapping of photogenerated charge carrier lifetimes.
- Contacting the silicon surface with various liquids (spirits, water).
- Recording sensor responses at different bias voltages to enhance reliability.
Main Results:
- Successfully generated unique electronic fingerprints for different liquids.
- Demonstrated the sensitivity of silicon surface states to surrounding liquids.
- Achieved reliable differentiation of various spirits and water samples.
- Validated the effectiveness of using multiple bias voltages for improved recognition.
Conclusions:
- The developed electronic tongue shows promise as a rapid and reliable sensing tool.
- Silicon's photogenerated charge carrier lifetime mapping is a viable method for liquid analysis.
- The sensor technology has potential applications in quality control and authentication.
