Limits...
Selectable Ultrasensitive Detection of Hg(2+) with Rhodamine 6G-Modified Nanoporous Gold Optical Sensor.

Wang Z, Yang M, Chen C, Zhang L, Zeng H - Sci Rep (2016)

Bottom Line: An extremely sensitive fluorescence sensor has been developed for selectively detection of mercury ions based on metallophilic Hg(2+)-Au(+) interactions, which results in an effective release of pre-adsorbed rhodamine 6G (R6G) molecules from the nanoporous gold substrate, associated with a significant decrease of fluorescence intensity.The optical sensor has a detection sensitivity down to 0.6 pM for Hg(2+) and CH3Hg(+) ions, in particular a superior selectivity in a complex aqueous system containing 13 different types of metal ions, meanwhile maintaining a long-term stability after 10 cycles.Such a fluorescence sensor combining multiple advantages therefore present promising potentials in various applications.

View Article: PubMed Central - PubMed

Affiliation: Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System (Ministry of Education), School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.

ABSTRACT
An extremely sensitive fluorescence sensor has been developed for selectively detection of mercury ions based on metallophilic Hg(2+)-Au(+) interactions, which results in an effective release of pre-adsorbed rhodamine 6G (R6G) molecules from the nanoporous gold substrate, associated with a significant decrease of fluorescence intensity. The optical sensor has a detection sensitivity down to 0.6 pM for Hg(2+) and CH3Hg(+) ions, in particular a superior selectivity in a complex aqueous system containing 13 different types of metal ions, meanwhile maintaining a long-term stability after 10 cycles. Such a fluorescence sensor combining multiple advantages therefore present promising potentials in various applications.

No MeSH data available.


Normalized fluorescence intensity variation (I/I0) of R6G/MPA-NPG as a function of mercury ion (Hg2+, CH3Hg+ and C6H5Hg+) concentration.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4940742&req=5

f4: Normalized fluorescence intensity variation (I/I0) of R6G/MPA-NPG as a function of mercury ion (Hg2+, CH3Hg+ and C6H5Hg+) concentration.

Mentions: The sensor not only available for detection of inorganic mercury ions, but also can be used to detect organomercury. Two kinds of organomercury, methylmercury (CH3Hg+) and phenylmercury (C6H5Hg+), are chosen for the detection. As shown in Fig. 4, the fluorescence variations of three specific mercury species are similar. In general, the curve of fluorescence intensity toward C6H5Hg+ concentration has better linearity, and the sensitivity for detecting methylmercury even better than Hg2+, probably due to the better binding ability of methylmercury with carboxyl of MPA on the NPG surface.


Selectable Ultrasensitive Detection of Hg(2+) with Rhodamine 6G-Modified Nanoporous Gold Optical Sensor.

Wang Z, Yang M, Chen C, Zhang L, Zeng H - Sci Rep (2016)

Normalized fluorescence intensity variation (I/I0) of R6G/MPA-NPG as a function of mercury ion (Hg2+, CH3Hg+ and C6H5Hg+) concentration.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4940742&req=5

f4: Normalized fluorescence intensity variation (I/I0) of R6G/MPA-NPG as a function of mercury ion (Hg2+, CH3Hg+ and C6H5Hg+) concentration.
Mentions: The sensor not only available for detection of inorganic mercury ions, but also can be used to detect organomercury. Two kinds of organomercury, methylmercury (CH3Hg+) and phenylmercury (C6H5Hg+), are chosen for the detection. As shown in Fig. 4, the fluorescence variations of three specific mercury species are similar. In general, the curve of fluorescence intensity toward C6H5Hg+ concentration has better linearity, and the sensitivity for detecting methylmercury even better than Hg2+, probably due to the better binding ability of methylmercury with carboxyl of MPA on the NPG surface.

Bottom Line: An extremely sensitive fluorescence sensor has been developed for selectively detection of mercury ions based on metallophilic Hg(2+)-Au(+) interactions, which results in an effective release of pre-adsorbed rhodamine 6G (R6G) molecules from the nanoporous gold substrate, associated with a significant decrease of fluorescence intensity.The optical sensor has a detection sensitivity down to 0.6 pM for Hg(2+) and CH3Hg(+) ions, in particular a superior selectivity in a complex aqueous system containing 13 different types of metal ions, meanwhile maintaining a long-term stability after 10 cycles.Such a fluorescence sensor combining multiple advantages therefore present promising potentials in various applications.

View Article: PubMed Central - PubMed

Affiliation: Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System (Ministry of Education), School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.

ABSTRACT
An extremely sensitive fluorescence sensor has been developed for selectively detection of mercury ions based on metallophilic Hg(2+)-Au(+) interactions, which results in an effective release of pre-adsorbed rhodamine 6G (R6G) molecules from the nanoporous gold substrate, associated with a significant decrease of fluorescence intensity. The optical sensor has a detection sensitivity down to 0.6 pM for Hg(2+) and CH3Hg(+) ions, in particular a superior selectivity in a complex aqueous system containing 13 different types of metal ions, meanwhile maintaining a long-term stability after 10 cycles. Such a fluorescence sensor combining multiple advantages therefore present promising potentials in various applications.

No MeSH data available.