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Publication
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| Title of Article |
l-Cysteine modified luminescence nanomaterials as fluorescence sensor for Co2+ : Effects of core nanomaterials in detection selectivity |
| Date of Acceptance |
9 April 2015 |
| Journal |
| Title of Journal |
Sensors and Actuators B: Chemical |
| Standard |
ISI |
| Institute of Journal |
Elsevier |
| ISBN/ISSN |
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| Volume |
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| Issue |
216 |
| Month |
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| Year of Publication |
2015 |
| Page |
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| Abstract |
A selective cobalt ion sensor derived from l- Cysteine modified on fluorescence nanomaterials including silver nanoclusters (l-Cyst-AgNCs) and cadmuim sulfide quantum dots (l-Cyst-CdS QDs) were proposed. In the presence of Co2+, the fluorescence intensity of both nanomaterials were efficiently quenched. However, in the case of l-Cyst-CdS QDs, other metal ions can also quench the fluorescence intensity of l-Cyst-CdS QDs. On the other hand, the fluorescence intensity of l-Cyst-AgNCs can be quenched exclusively in the presence of Co2+ suggested the role of the fluorescence core material towards the detection selectivity. Circular dichroism spectroscopy revealed that only Co2+
could interact with l-Cyst-AgNCs by coordinating with l-Cysteine modified on AgNCs surface. Thus, l-Cyst-AgNCs were used as a sensor to
detect Co
2+
by measuring the fluorescence quenching. In addition, the degree of fluorescence quenching was linearly increased with the increasing of Co2+ concentration. The proposed l-Cyst-AgNCs sensor
can be used to detect Co
2+
in a wide working linear concentration range of 14–150 M. Furthermore, the proposed sensor can be efficiently used for detection of Co2+ in real water samples with satisfactory results.
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| Keyword |
Silver nanoclusters, Cobalt ion, Fluorescence sensors, Optical nanomaterials Chemical sensors, |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ตีพิมพ์แล้ว |
| Level of Publication |
นานาชาติ |
| citation |
true |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Journal Publication
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