Journal article
Nanostructured electrochemical sensors based on functionalized nanoporous silica for voltammetric analysis of lead, mercury, and copper
Journal of nanoscience and nanotechnology, Vol.5(9), pp.1537-1540
09/2005
Handle:
https://hdl.handle.net/2376/115648
PMID: 16193970
Abstract
We have successfully developed electrochemical sensors based on functionalized nanostructured materials for voltammetric analysis of toxic metal ions. Glycinylurea self-assembled monolayers on mesoporous silica (Gly-UR SAMMS) were incorporated in carbon paste electrodes for the detection of toxic metal ions such as lead, copper, and mercury based on adsorptive stripping voltammetry (AdSV). The electrochemical sensor yields a linear response at a low ppb level of Pb2+ (i.e., 2.5-50 ppb) after a 2-min preconcentration period, with reproducible measurements (%RSD = 3.5, N = 6) and an excellent detection limit (1 ppb). By exploiting the interfacial functionality of Gly-UR SAMMS, the sensor is selective for the target species, does not require the use of a mercury film, and can be easily regenerated in dilute acid solution. The rigid, open, parallel pore structure, combined with suitable interfacial chemistry of SAMMS, also results in fast analysis times (2-3 min). The nanostructured SAMMS materials enable the development of miniature sensing devices that are compact and low cost, have low energy consumption, and are easily integrated into field-deployable units.
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Details
- Title
- Nanostructured electrochemical sensors based on functionalized nanoporous silica for voltammetric analysis of lead, mercury, and copper
- Creators
- Wassana Yantasee - Pacific Northwest National Laboratory, Richland, Washington 99352, USAGlen E FryxellMarianne M ConnerYuehe Lin
- Publication Details
- Journal of nanoscience and nanotechnology, Vol.5(9), pp.1537-1540
- Academic Unit
- Mechanical and Materials Engineering, School of
- Publisher
- United States
- Grant note
- 1 R01 ES010976-01A2 / NIEHS NIH HHS
- Identifiers
- 99900547900201842
- Language
- English
- Resource Type
- Journal article