The operational parameters of a new fibre-optic sensor for ferric ions in aqueous media

Malcik, N.; Caglar, Perihan

doi:10.1016/s0925-4005(97)80239-0

Cited by 10 publications

(5 citation statements)

References 6 publications

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“…5c with the PSIDA/DSPC bilayers alone for Fe 3+ rivals some of the best iron sensors using flow injection 21,22 or various optical sensor platforms. 23,24 Monitoring ferric and ferrous ion concentrations in the body is an important area of biomedical research. Excess iron, or iron loading, in specific tissues promotes the development of a number of diseases, including bacterial infection, neoplasia, cardiomyopathy, arthropathy, and possibly neurodegenerative disorders.…”

Section: Discussionmentioning

confidence: 99%

Selective fluorescence detection of divalent and trivalent metal ions with functionalized lipid membranes

et al. 2005

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A series of functionalized lipid membranes were shown to respond selectively to Fe 3+ , Cr 3+ , Cu 2+ , and Fe 2+ with a distinctive change in bilayer fluorescence. The optical response is due to a change in the aggregational state of functionalized, pyrene-labeled lipids as they recognize and bind to the metal ion. Two new lipids are introduced with 2,29-bipyridine (PSBiPy) and N-methylamide (PSMA) headgroups. These functionalized lipids, along with two other lipids having hydroxyl (PSOH) and iminodiacetic acid (PSIDA) headgroups, were incorporated into bilayers of distearylphosphatidylcholine (DSPC) producing materials that exhibited an excellent range of sensitivity for the metal ions at low pH. At neutral pH the metal ion sensitivities were lost for PSOH and PSMA while the sensitivity and selectivity for Cu 2+ increased for PSBiPy. In addition to optical sensing, the bilayers also can undergo restructuring of the membrane architecture. Dynamic light scattering and transmission electron microscope images show that for the majority of the bilayers, metal ion addition caused only aggregation of the vesicles. However, for the PSBiPy/DSPC membranes extraordinary square-shaped assemblies of planar bilayers formed in the presence of 100 mM Cu 2+ .

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Section: Discussionmentioning

confidence: 99%

Selective fluorescence detection of divalent and trivalent metal ions with functionalized lipid membranes

et al. 2005

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“…The continuous determination of heavy metal ions is of growing interest in environmental and clinical analyses [1]. Iron is one of the most important elements among heavy metals for metabolic processes, being indispensable for plants and animals and therefore it is extensively distributed in environmental and biological materials [2].…”

Section: Introductionmentioning

confidence: 99%

“…These methods can offer good limits of detection and wide linear ranges, but are very expensive and do not easily lend themselves to miniaturisation [3,4]. The development of sensors based on an immobilized reagent is subject of growing interest [1,3].…”

Section: Introductionmentioning

confidence: 99%

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Fluorescence emission studies of 4-(2-furylmethylene)-2-phenyl-5-oxazolone embedded in polymer thin film and detection of Fe3+ ion

2007

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“…The oxidation current reaches a peak at a potential characteristic of the metal, which provides the identity of the metal. Other methods include fluorescence detection, − porphyrin derivatives as complexing agents, array-based sensors, , magnetic effects, ion-sensitive field effect transistors, and microfabricated cantilevers. , While each method has its own advantages and disadvantages, development of a reliable and sensitive sensor requires further efforts.…”

mentioning

confidence: 99%

Detection of Heavy Metal Ions Based on Quantum Point Contacts

2003

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We report on a method to detect trace amounts of metal ions using electrodes separated by atomic scale gaps. By sweeping the electrode potentials cathodically, we deposit metal ions into the gap and form a point contact between the two electrodes, which triggers a quantum jump in the conductance. The deposition time required to form the point contact increases as the ion concentration decreases. We can also dissolve the point contact by sweeping the potentials anodically, which causes a sharp decrease in the conductance. The potentials at which a point contact is formed and dissolved provides the identity of the ions.

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The operational parameters of a new fibre-optic sensor for ferric ions in aqueous media

Cited by 10 publications

References 6 publications

Selective fluorescence detection of divalent and trivalent metal ions with functionalized lipid membranes

Selective fluorescence detection of divalent and trivalent metal ions with functionalized lipid membranes

Fluorescence emission studies of 4-(2-furylmethylene)-2-phenyl-5-oxazolone embedded in polymer thin film and detection of Fe3+ ion

Detection of Heavy Metal Ions Based on Quantum Point Contacts

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