Simultaneous label-free and pretreatment-free detection of heavy metal ions in complex samples using electrodes decorated with vertically ordered silica nanochannels
In this work, indium tin oxide coated glass (ITO) decorated with vertically-ordered mesoporous silica film (VMSF/ITO) is synthesized and applied as electrochemical sensor for simultaneous label-free and pretreatment-free detection of Pb2+, Cu2+, and Cd2+ in human serum and soil leaching solution. Us...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2018
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| Online Access: | https://hdl.handle.net/10356/89337 http://hdl.handle.net/10220/44863 |
| _version_ | 1811690205033267200 |
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| author | Cheng, Bowen Zhou, Lin Lu, Lili Liu, Jiyang Dong, Xiaoping Xi, Fengna Chen, Peng |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Cheng, Bowen Zhou, Lin Lu, Lili Liu, Jiyang Dong, Xiaoping Xi, Fengna Chen, Peng |
| author_sort | Cheng, Bowen |
| collection | NTU |
| description | In this work, indium tin oxide coated glass (ITO) decorated with vertically-ordered mesoporous silica film (VMSF/ITO) is synthesized and applied as electrochemical sensor for simultaneous label-free and pretreatment-free detection of Pb2+, Cu2+, and Cd2+ in human serum and soil leaching solution. Using differential pulse voltammetry (DPV), the electrochemical detection consists of electro-deposition of metal species and subsequent anodic stripping in the silica nanochannels. Because of the electrostatic enrichment and nano-confinement effects, VMSF/ITO is able to simultaneously detect Pb2+, Cu2+, and Cd2+ in a mixture with low detection limits (2.6 nM, 32 nM and 230 nM, respectively). Moreover, VMSF confer the electrode with excellent anti-fouling and anti-interference property through steric exclusion and electrostatic repulsion. Direct analysis of complex biological (human serum) and environmental (soil leaching solution) samples could be finished within 10 min without the usual need of tedious pretreatment. Furthermore, the VMSF/ITO sensor can be reused for several times without performance degradation. |
| first_indexed | 2024-10-01T06:00:17Z |
| format | Journal Article |
| id | ntu-10356/89337 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:00:17Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/893372023-12-29T06:50:08Z Simultaneous label-free and pretreatment-free detection of heavy metal ions in complex samples using electrodes decorated with vertically ordered silica nanochannels Cheng, Bowen Zhou, Lin Lu, Lili Liu, Jiyang Dong, Xiaoping Xi, Fengna Chen, Peng School of Chemical and Biomedical Engineering Vertically-ordered Silica Nanochannels Electrochemical Sensing In this work, indium tin oxide coated glass (ITO) decorated with vertically-ordered mesoporous silica film (VMSF/ITO) is synthesized and applied as electrochemical sensor for simultaneous label-free and pretreatment-free detection of Pb2+, Cu2+, and Cd2+ in human serum and soil leaching solution. Using differential pulse voltammetry (DPV), the electrochemical detection consists of electro-deposition of metal species and subsequent anodic stripping in the silica nanochannels. Because of the electrostatic enrichment and nano-confinement effects, VMSF/ITO is able to simultaneously detect Pb2+, Cu2+, and Cd2+ in a mixture with low detection limits (2.6 nM, 32 nM and 230 nM, respectively). Moreover, VMSF confer the electrode with excellent anti-fouling and anti-interference property through steric exclusion and electrostatic repulsion. Direct analysis of complex biological (human serum) and environmental (soil leaching solution) samples could be finished within 10 min without the usual need of tedious pretreatment. Furthermore, the VMSF/ITO sensor can be reused for several times without performance degradation. Accepted version 2018-05-23T01:15:16Z 2019-12-06T17:23:12Z 2018-05-23T01:15:16Z 2019-12-06T17:23:12Z 2017 Journal Article Cheng, B., Zhou, L., Lu, L., Liu, J., Dong, X., Xi, F., et al. (2018). Simultaneous label-free and pretreatment-free detection of heavy metal ions in complex samples using electrodes decorated with vertically ordered silica nanochannels. Sensors and Actuators B: Chemical, 259, 364-371. 0925-4005 https://hdl.handle.net/10356/89337 http://hdl.handle.net/10220/44863 10.1016/j.snb.2017.12.083 en Sensors and Actuators B: Chemical © 2017 Elsevier B.V. This is the author created version of a work that has been peer reviewed and accepted for publication by Sensors and Actuators B: Chemical, Elsevier B.V. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.snb.2017.12.083]. 26 p. application/pdf |
| spellingShingle | Vertically-ordered Silica Nanochannels Electrochemical Sensing Cheng, Bowen Zhou, Lin Lu, Lili Liu, Jiyang Dong, Xiaoping Xi, Fengna Chen, Peng Simultaneous label-free and pretreatment-free detection of heavy metal ions in complex samples using electrodes decorated with vertically ordered silica nanochannels |
| title | Simultaneous label-free and pretreatment-free detection of heavy metal ions in complex samples using electrodes decorated with vertically ordered silica nanochannels |
| title_full | Simultaneous label-free and pretreatment-free detection of heavy metal ions in complex samples using electrodes decorated with vertically ordered silica nanochannels |
| title_fullStr | Simultaneous label-free and pretreatment-free detection of heavy metal ions in complex samples using electrodes decorated with vertically ordered silica nanochannels |
| title_full_unstemmed | Simultaneous label-free and pretreatment-free detection of heavy metal ions in complex samples using electrodes decorated with vertically ordered silica nanochannels |
| title_short | Simultaneous label-free and pretreatment-free detection of heavy metal ions in complex samples using electrodes decorated with vertically ordered silica nanochannels |
| title_sort | simultaneous label free and pretreatment free detection of heavy metal ions in complex samples using electrodes decorated with vertically ordered silica nanochannels |
| topic | Vertically-ordered Silica Nanochannels Electrochemical Sensing |
| url | https://hdl.handle.net/10356/89337 http://hdl.handle.net/10220/44863 |
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