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Vol. 113, Issue 2, February 2010, pp. 56-62

 

Bullet

 

Optical Behavior by Congo Red Doped in Polymer and Sol-Gel Film

 

*A. Kazemzadeh, R. Kashanaki and M. R. Hassanzadeh

Materials & Energy Research center

P. O. Box 14155 4777 Tehran Iran

Tel.: +98261-6204131-4, fax: +98261-6201888

E-mail: Asg642001@yahoo.com

 

 

Received: 20 October 2009   /Accepted: 19 February 2010   /Published: 26 February 2010

 

Abstract: A pH Chemical sensor with high sensitivity is achieved by direct attachment of Cong Red indicator over a Sol-Gel and polymeric film. This sensor is prepared by attaching Congo red over polymeric film or by adding indicator in tetra metoxysilan (TMOS) in order to determining hydrogen ion in solution with high concentration of hydrogen and producing strong signals and rapid response time. Congo red is used over a Sol-Gel or polymeric film as a chemical-optical sensor. Sol-Gel layer and polymeric membrane have long lifetime as (>15 months) and (>12 months) and short response time as (>6 sec) and (>9 sec) respectively. It is a simple method and applied dye has low price and highly used. In this paper, the purpose is investigation and optimizing condition for Sol-Gel layer and polymeric film. Finally morphology of polymeric film and Sol-Gel layer surfaces were investigated by AFM apparatus and subsequently Sol-Gel layer have been found to be a favorite base for chemical sensor a fabrication.

 

Keywords: Optical, pH, Congo Red, Polymer, Sol-Gel and Sensing Film

 

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