Title of article
Fast and long term optical sensors for pH based on sol–gels Original Research Article
Author/Authors
Enju Wang، نويسنده , , Kwok-Fan Chow، نويسنده , , Vivian Kwan، نويسنده , , Tammy Chin، نويسنده , , Crystal Wong، نويسنده , , Andrew Bocarsly، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2003
Pages
6
From page
45
To page
50
Abstract
Long lasting and fast response optical sensor for the detection of pH in the range of 6–12 is described. The sensor is fabricated by spin coating silica sol in the presence of phenol red (PR). The sol is in turn obtained by acidic hydrolysis of tetraethoxysilane (TEOS) and phenyltriethoxysilane (Ph-TriEOS). The performance of the sensor depends on the ratio of Ph-TriOES to TEOS. At the optimal composition, the sensor has a response time of less than 20 s, the response is completely reversible and its life-time is over 12 months.
Keywords
Phenol red , Sol–gel , pH , TEOS , Optical sensors
Journal title
Analytica Chimica Acta
Serial Year
2003
Journal title
Analytica Chimica Acta
Record number
1030202
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