Gold Nanoparticle-Based Sensing of “Spectroscopically Silent” Heavy Metal Ions

Kim, Young‐Jin; Johnson, Robert C.; Hupp, Joseph T.

doi:10.1021/nl0100116

Cited by 903 publications

(643 citation statements)

References 16 publications

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“…A colometric approach similar to the one already described above for DNA was recently used to probe for heavy metal ions, including toxic metals such as lead, cadmium, and mercury (166). The method is based on 11-mercaptoundecanoic acid functionalized gold particles, which are aggregated in solution in the presence of divalent ions by an ion-templated chelation process.…”

Section: Applications Of Metal Nanoparticles As Sensorsmentioning

confidence: 99%

Optical Properties and Ultrafast Dynamics of Metallic Nanocrystals

Link¹,

El‐Sayed

2003

Annu. Rev. Phys. Chem.

1,490

1,491

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Noble metal particles have long fascinated scientists because of their intense color, which led to their application in stained glass windows as early as the Middle Ages. The recent resurrection of colloidal and cluster chemistry has brought about the strive for new materials that allow a bottoms-up approach of building improved and new devices with nanoparticles or artificial atoms. In this review, we discuss some of the properties of individual and some assembled metallic nanoparticles with a focus on their interaction with cw and pulsed laser light of different energies. The potential application of the plasmon resonance as sensors is discussed.

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Section: Applications Of Metal Nanoparticles As Sensorsmentioning

confidence: 99%

Optical Properties and Ultrafast Dynamics of Metallic Nanocrystals

Link¹,

El‐Sayed

2003

Annu. Rev. Phys. Chem.

1,490

1,491

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“…Although they have not presented any data for Hg 2+ ion, they have indicated that similar responses were obtained with Hg 2+ -and Cd 2+ -containing solutions. Due to the lack of selectivity, the gold nanoparticle-based HRS assay reported by Kim et al 17 cannot be applied to detect heavy metal ions from environmental samples. Here we report a highly selective and sensitive HRS assay for mercury (II) recognition at 5 ppb level in aqueous solution using gold nanoparticles modified with mercaptopropionic acid (MPA), homocystine (HCys), and 2,6-pyridinedicarboxylic acid (PDCA).…”

Section: Introductionmentioning

confidence: 99%

Selective Detection of Mercury (II) Ion Using Nonlinear Optical Properties of Gold Nanoparticles

et al. 2008

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Contamination of the environment with heavy metal ions has been an important concern throughout the world for decades. Driven by the need to detect trace amounts of mercury in environmental samples, this article demonstrates for the first time that nonlinear optical (NLO) properties of MPA-HCys-PDCA-modified gold nanoparticles can be used for rapid, easy and reliable screening of Hg(II) ions in aqueous solution, with high sensitivity (5 ppb) and selectivity over competing analytes. The hyper Rayleigh scattering (HRS) intensity increases 10 times after the addition of 20 ppm Hg 2+ ions to modified gold nanoparticle solution. The mechanism for HRS intensity change has been discussed in detail using particle size-dependent NLO properties as well as a two-state model. Our results show that the HRS assay for monitoring Hg(II) ions using MPAHCys-PDCA-modified gold nanoparticles has excellent selectivity over alkali, alkaline earth (Li + , Na + , K + , Mg 2+ , Ca 2+ ), and transition heavy metal ions (Pb 2+ , Pb + , Mn 2+ , Fe 2+ , Cu 2+ , Ni 2+ , Zn 2+ , Cd 2+ ).

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“…decanoic acid (11-MUA) [32], 3-mercaptopropionic acid (3-MPA) [33] and dithioerythritol (DTET) [34]. However, masking agents such as 2,6-pyridinedicarboxylic acid (PDCA) [35] and ethylene diamine tetraacetic acid (EDTA) [34] must be added to improve the selectivity in these colorimetric assays.…”

Section: Science China Materialsmentioning

confidence: 99%

Recent developments on nanomaterials-based optical sensors for Hg2+ detection

Duan

Zhan

2015

Sci. China Mater.

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Mercuric ion (Hg 2+ ), released from both natural and industrial sources, has severe adverse effects on human health and the environment even at very low concentrations. It is very important to develop a rapid and economical method for the detection of Hg 2+ with high sensitivity and selectivity. Nanomaterials with unique size and shape-dependent optical properties are attractive sensing materials. The application of nanomaterials to design optical sensors for Hg 2+ provides a powerful method for the trace detection of Hg 2+ in the environment, because these optical sensors are simple, rapidly responsive, cost-effective and highly sensitive. This review summarizes the recent advances on the development of optical assays for Hg 2+ in aqueous solution by using functionalized nanomaterials (including noble metal nanoparticles, fluorescent metal nanoclusters, semiconductor quantum dots and carbon nanodots). Detection strategies based on the Hg 2+ -induced changes in spectral absorbance, fluorescence intensity and surface-enhanced Raman scattering signals were described. And the design principles for each optical assay were presented. In addition, the future challenge and the prospect of the development of nanomaterial optical sensors for Hg 2+ detection were also discussed.

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Gold Nanoparticle-Based Sensing of “Spectroscopically Silent” Heavy Metal Ions

Cited by 903 publications

References 16 publications

Optical Properties and Ultrafast Dynamics of Metallic Nanocrystals

Optical Properties and Ultrafast Dynamics of Metallic Nanocrystals

Selective Detection of Mercury (II) Ion Using Nonlinear Optical Properties of Gold Nanoparticles

Recent developments on nanomaterials-based optical sensors for Hg2+ detection

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