Optimization of a sensitive method for the “switch-on” determination of mercury(II) in waters using Rhodamine B capped gold nanoparticles as a fluorescence sensor

Zheng, Aifang; Chen, Jinlong; Wu, Ganning; Wei, Heping; He, Chiyang; Kai, Xiaoming; Wu, Guangxin; Chen, Youcun

doi:10.1007/s00604-008-0023-4

Cited by 42 publications

(32 citation statements)

References 63 publications

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“…As already stated, the LOD of the proposed method in the present manuscript is 0.15 µg·L −1 , which corresponds to 0.75 × 10 −9 M. The LODs reported for the gold nanoparticles based rhodamine derivative reagents in [31,32,39] are 10 × 10 −9 M, 0.06 × 10 −9 M and 0.6 × 10 −9 M, respectively. Our method favorably compares with that of [31] and is practically comparable to that reported in [39]. All other reagents reported in the mentioned table are higher than the LOD of the present method.…”

Section: Resultssupporting

confidence: 63%

“…As mentioned in the Introduction, several authors suggested the occurrence of a RET and collision process between the rhodamine and AuNPs [32,39], and it is also known that this process is usually occurring in a biomolecular dye-quencher system through single dipole–dipole interaction FRET [37]. Other authors suggested that in the case of AuNPs the dipole–dipole interaction is replaced by a dipole–multipole interaction due to the metallic surface, and the process is known as NSET [40,41], or that these two mentioned processes, i.e., FRET and NSET, could occur simultaneously [42].…”

Section: Resultsmentioning

confidence: 99%

“…The herein proposed methodology allows detecting Hg 2+ at 0.15 μg·L −1 , which is in agreement with the requirements imposed by national and international norms, and constitutes a substantial improvement with respect to the previously quoted publications. There are other reports achieving very low detection limits for Hg 2+ in aqueous solution as can be seen, for example, in a comparative study published in Table 2 of [39], comparing the linear range and detection limit of nine selected fluorimetric methods for Hg 2+ detection, including those reported in [31,32,39]. As already stated, the LOD of the proposed method in the present manuscript is 0.15 µg·L −1 , which corresponds to 0.75 × 10 −9 M. The LODs reported for the gold nanoparticles based rhodamine derivative reagents in [31,32,39] are 10 × 10 −9 M, 0.06 × 10 −9 M and 0.6 × 10 −9 M, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Some authors postulate that, in the case of AuNPs, the dipole–dipole interaction is replaced by a dipole–multipole interaction due to the metallic surface, and the process is known as nanomaterial surface energy transfer (NSET) [38]. In the case of rhodamine–AuNPs systems, different studies suggested the occurrence of FRET [32,39], NSET [40,41], and both FRET and NSET simultaneously [42]. It is important to mention that the partial or complete overlap between the SPR band of the AuNPs and the emission band of the dye, acting in this case the rhodamine as the donor and the AuNPs as the acceptor, is a prerequisite for the occurrence of the efficient energy transfer.…”

Section: Introductionmentioning

confidence: 99%

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Highly Selective and Ultrasensitive Turn-on Luminescence Chemosensor for Mercury (II) Determination Based on the Rhodamine 6G Derivative FC1 and Au Nanoparticles

Brasca

Onaindia

Goicoechea

et al. 2016

Sensors

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A method for the detection and quantitation of Hg2+ in aqueous samples by fluorescence spectroscopy is presented. It consists of a turn-on sensor developed by coupling Gold nanoparticles (AuNPs) with the rhodamine 6G derivative FC1, in which the response is generated by a mercury-induced ring-opening reaction. The AuNPs were included in order to improve the sensitivity of the method towards the analyte, maintaining its high selectivity. The method was validated in terms of linearity, precision and accuracy, and applied to the quantitation of Hg2+ in Milli-Q and tap water with and without spiked analyte. The limit of detection and quantitation were 0.15 μg·L−1 and 0.43 μg·L−1, respectively, constituting a substantial improvement of sensitivity in comparison with the previously reported detection of Hg2+ with free FC1.

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Section: Resultssupporting

confidence: 63%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Highly Selective and Ultrasensitive Turn-on Luminescence Chemosensor for Mercury (II) Determination Based on the Rhodamine 6G Derivative FC1 and Au Nanoparticles

Brasca

Onaindia

Goicoechea

et al. 2016

Sensors

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show abstract

“…Certain optical micro-sensors reach the detection limit of 0.2 μg/L by spectrometry [71,72,74] or fluorimetry [87,88], and electrochemical micro-sensors come down to the limit detection of 0.1 μg/L [38,111]. …”

Section: Scientific Articlesmentioning

confidence: 99%

Recent Trends in Monitoring of European Water Framework Directive Priority Substances Using Micro-Sensors: A 2007–2009 Review

Namour

Lepot

Jaffrézic‐Renault

2010

Sensors

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This review discusses from a critical perspective the development of new sensors for the measurement of priority pollutants targeted in the E.U. Water Framework Directive. Significant advances are reported in the paper and their advantages and limitations are also discussed. Future perspectives in this area are also pointed out in the conclusions. This review covers publications appeared since December 2006 (the publication date of the Swift report). Among priority substances, sensors for monitoring the four WFD metals represent 81% of published papers. None of analyzed publications present a micro-sensor totally validated in laboratory, ready for tests under real conditions in the field. The researches are mainly focused on the sensing part of the micro-sensors. Nevertheless, the main factor limiting micro-sensor applications in the environment is the ruggedness of the receptor towards environmental conditions. This point constitutes the first technological obstacle to be overcome for any long-term field tests.

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Nanomaterials in the Environment: the Good, the Bad, and the Ugly

Clark

Veinot

Wong

2010

Trace Analysis With Nanomaterials

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the surface causes changes in the LSPR, giving rise to shifts in the absorption spectrum. Similar to the case of fl uorescence monitoring, the surface of a noble metal particle may be modifi ed to bind a desired analyte selectively, giving a characteristic color change. The absorbance intensity of the newly formed color is proportional to the concentration of analyte present.Surface plasmon formation gives rise to intense colors such as those seen in ancient stained glass windows [3] . Noble metal nanomaterials are frequently used as colorimetric detectors due to their strong absorbance characteristics in the visible region. SPR ( surface plasmon resonance ) band extinction coeffi cients of 2.7 × 10 8 and 1.5 × 10 10 M − 1 cm − 1 (at 520 nm) have been reported for 13 and 50 nm diameter gold particles, respectively [12] . As mentioned previously, changes to the surface structure shifts the observed wavelength of the LSPR and hence gives rise to different colors. The magnitude of this shift depends the mass of the substituent and so the addition of an analyte alone will typically not induce a detectable SPR shift. Further SPR enhancement, however, may be induced by aggregation of NPs in the presence of a specifi c analyte. If bonding between surface groups and the analyte occurs, NPs move from being free -standing systems to large aggregates. This process also causes notable shifts in the LSPR and produces a distinct and easily identifi able color change [13] .To design an effective sensor, surface groups must be chosen such that they will react selectively with an analyte of choice and with a high binding constant. The functionalization of NPs is typically a simple, one -step process. A single noble metal NP may be surface modifi ed in various ways to detect many different analytes. However, unlike single molecule detectors that each have different chemical and physical properties, NP sensors possess similar optical properties because their optical response arises from a common core material. With this knowledge, noble metal NPs may be used to detect a wide range of analytes, including trace metals, pesticides, and gases by changing only the surface group. The most common NP core employed for colorimetric detection is Au; however, Ag has proven useful in some cases.Au -NPs are typically synthesized by citrate reduction of HAuCl 4 , the size of which can be controlled by the citrate concentration [14] . This synthetic procedure results in citrate " capped " Au -NPs whose size may be tuned between 5 and 20 nm. Larger particles, up to 40 nm, can be realized by adjusting the pH and the citrate to Au ratio [15] . Following synthesis and purifi cation, citrate remains physisorbed (i.e., adhered via electrostatic interactions as opposed to chemical bonds) to the surface, which stabilizes the nanoparticles in aqueous solution. The citrate capping is known to interact with various metal ion species, resulting in aggregationinduced colorimetric response at pH 6.7 [16] . Increasing the pH to 11.2 has allowed selective detect...

show abstract

Optimization of a sensitive method for the “switch-on” determination of mercury(II) in waters using Rhodamine B capped gold nanoparticles as a fluorescence sensor

Cited by 42 publications

References 63 publications

Highly Selective and Ultrasensitive Turn-on Luminescence Chemosensor for Mercury (II) Determination Based on the Rhodamine 6G Derivative FC1 and Au Nanoparticles

Highly Selective and Ultrasensitive Turn-on Luminescence Chemosensor for Mercury (II) Determination Based on the Rhodamine 6G Derivative FC1 and Au Nanoparticles

Recent Trends in Monitoring of European Water Framework Directive Priority Substances Using Micro-Sensors: A 2007–2009 Review

Nanomaterials in the Environment: the Good, the Bad, and the Ugly

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