Optoelectronic noses

Di Natale C, Salimbeni D, Paolesse R, Macagnano A, D Amico A. Porphyrins-based optoelectronic nose for volatile compounds detection. Sens Actuators 2000 B65 220-6. 

Suslick KS, Bailey DP, Ingison CK, et al. Seeing smells Development of an optoelectronic nose. Quim Nova 2007 30 677-81. 

Suslick KS. An optoelectronic nose seeing smells by means of colorimetric arrays. Mat Res Soc Bull 2004 720-5. 

FIGURE 3.5 Schematic sketch of the optoelectronic nose. In the figure, eight different optical paths are displayed, seven of them are covered with sensitive layers, while the last is left uncoated, as reference. (Reprinted from Di Natale C., Salimbeni D., Paolesse R., Macagnano A., and D Amico A., Porphyrins-based opto-electronic nose for volatile compounds detection, Sens. Actuators B, 65, 220-226, 2000, Copyright 2000, with permission from Elsevier Science.)... 

Suslick K. S., An optoelectronic nose Colorimetric sensor arrays, MRS Bull., 29, 720-725, 2004. 

Rakow N, Sen A, Janzen M, Ponder J, Suslick K (2005) Molecular recognition and discrimination of amines with a colorimetric array. Angew Chem Int Ed 44 4528-4532 Lim S, Feng L, Kemling J, Musto C, Suslick K (2009) An optoelectronic nose for the detection... 

Lim SH, Feng L, Kemling JW (2009) An optoelectronic nose for the detection of toxic gases. Nat Chem 1 562-567... 

It is important that all indicated devices can function at room temperatures. This means that polymer-based sensors have low power consumption (of the order of microwatts) because no heater element is required for their operation. Properties of polymers that influence the operating parameters of sensors can be physicochemical, chemical, optical (photo- and electroluminescence, optoelectronic), redox, hydrophobic/ hydrophilic, piezoelectric/pyroelectric, and electrical (conductivity, resistivity). Moreover, the polymer itself can be modified to bind biomolecules to a biosensor (Mulchandani and Wang 1996). It is mentioned above that polymers have considerable potential for fabrication of multisensing arrays required for e-nose fabrication (Janata and Huber 1985). 

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