Sol gel sensors

Jeronimo P., Araujo A., Montenegro M., Satinsky D., Solich P., Colorimetric bismuth determination in pharmaceuticals using a xylenol orange sol-gel sensor coupled to a multicommutated flow system, Anal. Chim. Acta. 2004 504 235-241. 

Sol-gel sensors can be easily prepared to function as site selectively templated and tagged xerogels (SSTTXs). The resulting platform is completely self-contained, and it achieves analyte recognition without the use of biomolecules,10 as shown for example by the selective detection and quantification of model compound 9-anthrol (Figure 6.11). 

S. B. Bambot, J, Sipior, J. R. Lakowicz, and G. Rao, Lifetime-based optical sensing of pH using resonance energy transfer in sol-gel sensors, Sensors Actuators B, in press. 

High sensitivities are achievable with sol-gel sensors. An example is the sensing... 

There is considerable literature on the use of sol-gel materials in chemical sensing applications. Sol-gel materials are attractive for sensing appUcatimis due to their porosity and their relatively low density in addition, some sol-gel materials (silica in particular) have optical properties that render them useful in optical sensors. A recent literature search yielded more than 2,700 references for sol-gel sensor." The vast majority of these... 

Zhang, Z. Hu, Y. Zhang, H. Yao, S. (2010a). Novel layer-by-layer assembly molecularly imprinted sol-gel sensor for selective recognition of clindamycin based on Au electrode decorated by multi-wall carbon nanotube. Journal of Colloid and Interface Science, 344,158-164. 

Dansby-Sparks RN, Jin J, Mechery SJ et al (2010) Fluorescent-dye-doped sol—gel sensor for highly sensitive carbon dioxide gas detection below atmospheric concentrations. Anal Chem 82 593-600... 

An important future aspect for the development of Useful applications of doped sol-gel sensors is miniaturization. One step towards that goal was undertaken with the fluorescent pH-probe pyranine. A pH-meter based on a 10-micron piece of doped sol-gel was constructed by incorporating it in a near-field optical microscopy configuration, which consists of metal-coated micropipette tips a good, reversible titration curve was obtained. Further miniaturizing to ca 1 micron was achieved as well, with subsecond response time. ... 

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