Abstract
There is presently considerable interest world-wide in
fabricating sensors based on miniaturized analytical
techniques encapsulated in sensing elements with an
inbuilt intelligence capable of distinguishing between
different analytes. For example, the measurement of
metal ion concentration in fluid media is a common
requirement when monitoring many types of industrial
processes and chemical reactions. In addition there is an
increasing requirement for the remote determination of
trace elements in water.We report a new type of remote optical sensor of metal ions in solution based on fluorescence lifetime quenching due to dipoledipole energy transfer across a polymer-water interface. Ion selectivity is provided by spectral overlap between the sensor fluorescence and metal ion absorption. The sensor is
demonstrated in the detection of cobalt ions in water at levels down to 17 fig.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Pages | 171-181 |
| Number of pages | 10 |
| Volume | 2388 |
| Publication status | Published - 1995 |
Keywords
- sensor
- energy transfer
- transition metal ions
- perylene
- lumogen dyes