Publication
Layer-by-layer immobilization of carbon dots fluorescent nanomaterials on single optical fiber
| dc.contributor.author | Gonçalves, Helena M. R. | |
| dc.contributor.author | Duarte, Abel J. | |
| dc.contributor.author | Davis, Frank | |
| dc.contributor.author | Higson, Seamus P. J. | |
| dc.contributor.author | Silva, Joaquim C. G. Esteves da | |
| dc.date.accessioned | 2013-09-30T11:01:18Z | |
| dc.date.available | 2013-09-30T11:01:18Z | |
| dc.date.issued | 2012 | |
| dc.description.abstract | We report within this paper the development of a fiber-optic based sensor for Hg(II) ions. Fluorescent carbon nanoparticles were synthesized by laser ablation and functionalized with PEG200 and N-acetyl-l-cysteine so they can be anionic in nature. This characteristic facilitated their deposition by the layer-by-layer assembly method into thin alternating films along with a cationic polyelectrolyte, poly(ethyleneimine). Such films could be immobilized onto the tip of a glass optical fiber, allowing the construction of an optical fluorescence sensor. When immobilized on the fiber-optic tip, the resultant sensor was capable of selectively detecting sub-micromolar concentrations of Hg(II) with an increased sensitivity compared to carbon dot solutions. The fluorescence of the carbon dots was quenched by up to 44% by Hg(II) ions and interference from other metal ions was minimal. | por |
| dc.identifier.doi | 10.1016/j.aca.2012.05.015 | pt_PT |
| dc.identifier.issn | 0003-2670 | |
| dc.identifier.uri | http://hdl.handle.net/10400.22/2036 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Elsevier | por |
| dc.relation.ispartofseries | Analytica Chimica Acta; Vol. 735 | |
| dc.relation.publisherversion | http://www.sciencedirect.com/science/article/pii/S000326701200726X | por |
| dc.subject | Carbon dots | por |
| dc.subject | Nanoparticles | por |
| dc.subject | Layer-by-layer immobilization | por |
| dc.subject | Single optical fiber | por |
| dc.subject | Mercury sensor | por |
| dc.title | Layer-by-layer immobilization of carbon dots fluorescent nanomaterials on single optical fiber | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 95 | por |
| oaire.citation.startPage | 90 | por |
| oaire.citation.volume | 735 | por |
| rcaap.rights | closedAccess | por |
| rcaap.type | article | por |