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Structure and Sensor Properties of Thin Ordered Solid Films
Department of Medicinal Chemistry and Microbiology, Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
* Author to whom correspondence should be addressed.
Received: 28 July 2009; in revised form: 9 September 2009 / Accepted: 9 September 2009 / Published: 28 September 2009
Abstract: Miniaturized gas sensors and biosensors based on nanostructured sensing elements have attracted considerable interest because these nanostructured materials can be used to significantly improve sensor sensitivity and the response time. We report here on a generic, reversible sensing platform based on hybrid nanofilms. Thin ordered Langmuir-Blodgett (LB) films built of fluorene derivatives were used as effective gas sensors for both oxidative and reductive analytes. A novel immobilization method based on thin LB films as a matrix has been developed for construction of sensing protein layers. Biomolecules can often be incorporated into and immobilized on Langmuir-Blodgett films using adsorption methods or by covalent immobilization of proteins. The sensor sensitisation was achieved by an amphiphilic N-alkyl-bis(thiophene)arylenes admixed into the film. The interlaced derivative was expected to facilitate the electron transfer, thereby enhancing the sensor sensitivity. The results suggest that this may be very promising approach for exploring the interactions between proteins and high throughput detection of phenol derivatives in wastewater.
Keywords: Langmuir-Blodgett films; laccase; tyrosinase; diphenylamine and carbazole derivatives; biosensing effect; gas sensors; electroconductivity; AFM
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Sołoducho, J.; Cabaj, J.; Świst, A. Structure and Sensor Properties of Thin Ordered Solid Films. Sensors 2009, 9, 7733-7752.
Sołoducho J, Cabaj J, Świst A. Structure and Sensor Properties of Thin Ordered Solid Films. Sensors. 2009; 9(10):7733-7752.
Sołoducho, Jadwiga; Cabaj, Joanna; Świst, Agnieszka. 2009. "Structure and Sensor Properties of Thin Ordered Solid Films." Sensors 9, no. 10: 7733-7752.