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Proceedings Paper

Self-assembled monolayer as optical transducers using spiropyran photochromic material
Author(s): Alicia Ortiz Ramírez; Raúl Delgado Macuil; Marlon Rojas López; Valentin López Gayou; Abdu Orduña Díaz
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Paper Abstract

The self assembled monolayers (SAM) have become in the most popular strategy for design and generate surfaces characterizing by specific functional organic groups. The aimed of this work is applied this SAM as optical transducer in biosensors. The techniques, Infrared (in ATR mode) and UV/Vis spectroscopy have been used to study the films generated in each step in the self assembled process. The SAM was generated as follow; first silane group was added to the glass substrate. After that, the substrates were immersed in a solution containing carbomiide group (EDC). Finally the spiropyran 1',3'-Dihydro-8-methoxy-1',3',3'-trimethyl-6-nitrospiro[2H-1-benzopyran-2,2'-(2H)-indole] was attached to functionalized slides. In each process absorbance was analyzed by UV/Vis (270 to 500 nm) and FTIR (650 to 1800 cm-1). In UV, the spectra shows an absorbance band centered at 280 associated to EDC film and a lower intensity band centered at 380 nm associated to spiropyran. In FTIR spectra, the Si-Si and Si-O bond are present below the 1250 cm-1. The EDC film shows very weak bands in the region from 1300 to 1800 cm-1. For the spiropyran film the band associated to the C-N, N-O, C=C, C-H and aromatic ring have a very well defined peaks. Once the transducer bands were detected, it was immersed in glucose solution; the infrared spectral show bands are associated to glucose in the transducer.

Paper Details

Date Published: 25 October 2011
PDF: 7 pages
Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 80111W (25 October 2011); doi: 10.1117/12.903353
Show Author Affiliations
Alicia Ortiz Ramírez, Ctr. de Investigación en Biotecnología Aplicada (Mexico)
Raúl Delgado Macuil, Ctr. de Investigación en Biotecnología Aplicada (Mexico)
Marlon Rojas López, Ctr. de Investigación en Biotecnología Aplicada (Mexico)
Valentin López Gayou, Ctr. de Investigación en Biotecnología Aplicada (Mexico)
Abdu Orduña Díaz, Ctr. de Investigación en Biotecnología Aplicada (Mexico)


Published in SPIE Proceedings Vol. 8011:
22nd Congress of the International Commission for Optics: Light for the Development of the World
Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Rufino Díaz-Uribe; Rufino Díaz-Uribe; Rufino Díaz-Uribe, Editor(s)

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