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Related Concept Videos

Olfaction01:25

Olfaction

49.5K
The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
The olfactory receptors are embedded in the cilia of the...
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Molecularly Imprinted Filtering Adsorbents for Odor Sensing.

Sho Shinohara1, You Chiyomaru2, Fumihiro Sassa3

  • 1Graduate School of Systems Life Sciences, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan. s.shinohara.877@s.kyushu-u.ac.jp.

Sensors (Basel, Switzerland)
|November 26, 2016
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Summary

Researchers developed advanced odor sensors using composite materials and molecularly imprinted polymers for enhanced molecular recognition. These novel sensors mimic animal olfactory systems, offering improved discrimination of environmental odorants for various applications.

Keywords:
adsorbentsmolecularly imprinted filtering adsorbentodor sensor

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Area of Science:

  • Materials Science
  • Chemical Sensors
  • Biomimetic Systems

Background:

  • Developing artificial odor sensors that rival the sensitivity and specificity of animal olfactory systems remains a significant challenge.
  • Animal olfaction relies on recognizing complex odorant patterns based on molecular properties, a strategy not yet fully replicated in artificial sensors.
  • Existing artificial odor sensors often lack the ability to discriminate among a vast array of environmental odorants effectively.

Purpose of the Study:

  • To engineer versatile odor sensors capable of discriminating a wide range of environmental odorants.
  • To explore composite adsorbents with tailored molecular recognition properties for enhanced odor sensing.
  • To develop a novel molecularly imprinted filtering adsorbent (MIFA) for improved specificity and odor molecular recognition.

Main Methods:

  • Fabrication of composite adsorbents using specific polymeric materials selected for their solubility parameters to adsorb diverse odorants.
  • Modification of adsorbent properties through the mixing of different adsorbent materials.
  • Development of a molecularly imprinted filtering adsorbent (MIFA) by coating an adsorbent substrate with a molecularly imprinted polymer (MIP) layer.

Main Results:

  • Composite adsorbents demonstrated tunable adsorption properties through material mixing.
  • The developed MIFA exhibited significantly improved specificity and odor molecular recognition capabilities.
  • The combination of adsorbent substrate and MIP layer enhanced the sensor's ability to target specific molecules.

Conclusions:

  • Composite materials with molecular recognition properties are effective for odor sensing applications.
  • Molecularly imprinted filtering adsorbents (MIFAs) offer a promising approach for creating highly specific artificial odor sensors.
  • The developed MIFA technique provides a controllable method for designing adsorbents with tailored adsorption properties for particular odor molecules.