期刊
MATERIALS TRANSACTIONS
卷 56, 期 4, 页码 539-544出版社
JAPAN INST METALS & MATERIALS
DOI: 10.2320/matertrans.M2014366
关键词
calixarene; self assembled monolayer (SAM); SPR sensors; cadmium ions; heavy metals; sensitivity
资金
- Scientific and Technical Research Center on the Arid Regions of Algeria (CRSTRA) [4/u40/4264]
In this work, a new chromogenic calix(4) arene was functionalized onto self assembled monolayer (SAM) of cysteamine for cadmium ions detection and tested by using SPR measurement. The functionalization of modified SPR sensor is based on the oxidation of calixarene-SAM alcohol group to quinone. Four interfering ions were used Cu2+, Co2+, Mg2+ and Ca2+. pH of sensor in which the sensitivity of sensor is higher was optimized for cadmium ions and detection of ions was made in basic solution. Detection limit reached for Cd2+ is lower than 10(-11) M with a dynamic response time of about 16 s when changing from 10(-6) M cadmium to 10(-5) M.
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