Journal article
Ultrasensitive detection of CrO4(2-) using a microcantilever sensor
Analytical chemistry (Washington), v 73(7), pp 1572-1576
01 Apr 2001
PMID: 11321311
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Abstract
Microcantilevers modified with a self-assembled monolayer respond sensitively to specific ion concentrations. Here, we report the detection of trace amounts of CrO4(2-) using microcantilevers modified with a self-assembled monolayer of triethyl-12-mercaptododecylammonium bromide. The self-assembled monolayer was prepared on a silicon microcantilever coated with a thin layer of gold on one side. The microcantilever undergoes bending due to sorption of CrO4(2-) ions on the monolayer-modified side. It was found that a concentration of 10(-9) M CrO4(2-) can be detected using this technology in a flow cell. Other anions, such as Cl-, Br-, CO3(2-) (or HCO3-), and SO4(2-), have minimal effect on the deflection of this cantilever. The mechanics of the bending and the chemistry of cantilever modification are discussed.
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Details
- Title
- Ultrasensitive detection of CrO4(2-) using a microcantilever sensor
- Creators
- H F JiT ThundatR DabestaniG M BrownP F BrittP V Bonnesen
- Publication Details
- Analytical chemistry (Washington), v 73(7), pp 1572-1576
- Publisher
- American Chemical Society (ACS)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:000167841900038
- Scopus ID
- 2-s2.0-0035298656
- Other Identifier
- 991019335597304721
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- Web of Science research areas
- Chemistry, Analytical