Picomolar detection of mercuric ions by means of gold-silver core-shell nanorods.

We report an ultrasensitive and selective probe for detection of mercuric ions using gold-silver core-shell nanorods as the substrate of surface-enhanced Raman scattering. The detection limit of this probe for mercuric ions can be as low as 1 pM. The efficiency of this probe in complex samples was evaluated by allowing detection of spiked mercuric ions in river water and fish samples.

[1]  Laszlo Magos,et al.  The toxicology of mercury--current exposures and clinical manifestations. , 2003, The New England journal of medicine.

[2]  Wei Zhang,et al.  Highly sensitive, colorimetric detection of mercury(II) in aqueous media by quaternary ammonium group-capped gold nanoparticles at room temperature. , 2010, Analytical chemistry.

[3]  Paresh Chandra Ray,et al.  Highly selective SERS probe for Hg(II) detection using tryptophan-protected popcorn shaped gold nanoparticles. , 2011, Chemical communications.

[4]  Xingyu Jiang,et al.  Gold nanoparticles for the colorimetric and fluorescent detection of ions and small organic molecules. , 2011, Nanoscale.

[5]  Luis M Liz-Marzán,et al.  SERS detection of small inorganic molecules and ions. , 2012, Angewandte Chemie.

[6]  E. Wang,et al.  Enhanced sensitivity of a direct SERS technique for Hg2+ detection based on the investigation of the interaction between silver nanoparticles and mercury ions. , 2012, Nanoscale.

[7]  C. Murphy,et al.  Quantitation of metal content in the silver-assisted growth of gold nanorods. , 2006, The journal of physical chemistry. B.

[8]  Itamar Willner,et al.  Optical analysis of Hg2+ ions by oligonucleotide-gold-nanoparticle hybrids and DNA-based machines. , 2008, Angewandte Chemie.

[9]  P Michael Bolger,et al.  Mercury and health. , 2002, The New England journal of medicine.

[10]  Zhi Huang,et al.  A SERS-based immunoassay with highly increased sensitivity using gold/silver core-shell nanorods. , 2012, Biosensors & bioelectronics.

[11]  Mostafa A. El-Sayed,et al.  Surface-enhanced Raman scattering of molecules adsorbed on gold nanorods: off-surface plasmon resonance condition , 2002 .

[12]  Jaromir Ruzicka,et al.  Atomic absorption spectroscopy for mercury, automated by sequential injection and miniaturized in lab-on-valve system. , 2005, Analytical chemistry.

[13]  Chad A Mirkin,et al.  Colorimetric detection of mercuric ion (Hg2+) in aqueous media using DNA-functionalized gold nanoparticles. , 2007, Angewandte Chemie.

[14]  Zoraida P. Aguilar,et al.  Shape-dependent surface-enhanced Raman scattering in gold–Raman-probe–silica sandwiched nanoparticles for biocompatible applications , 2012, Nanotechnology.

[15]  Kang Sun,et al.  Resettable, multi-readout logic gates based on controllably reversible aggregation of gold nanoparticles. , 2011, Angewandte Chemie.

[16]  Hui Ma,et al.  Ultrasensitive and selective detection of copper (II) and mercury (II) ions by dye-coded silver nanoparticle-based SERS probes. , 2013, Biosensors & bioelectronics.

[17]  X. Jia,et al.  Fast speciation of mercury in seawater by short-column high-performance liquid chromatography hyphenated to inductively coupled plasma spectrometry after on-line cation exchange column preconcentration. , 2012, Talanta.

[18]  Steven R. Emory,et al.  Probing Single Molecules and Single Nanoparticles by Surface-Enhanced Raman Scattering , 1997, Science.

[19]  Chih-Ching Huang,et al.  Selective gold-nanoparticle-based "turn-on" fluorescent sensors for detection of mercury(II) in aqueous solution. , 2006, Analytical chemistry.

[20]  Jiashu Sun,et al.  Highly robust, recyclable displacement assay for mercuric ions in aqueous solutions and living cells. , 2012, ACS nano.

[21]  Zhong Lin Wang,et al.  Shell-isolated nanoparticle-enhanced Raman spectroscopy , 2010, Nature.

[22]  Paresh Chandra Ray,et al.  Gold nanoparticle-based miniaturized nanomaterial surface energy transfer probe for rapid and ultrasensitive detection of mercury in soil, water, and fish. , 2007, ACS nano.

[23]  Zusing Yang,et al.  Synthesis of highly fluorescent gold nanoparticles for sensing mercury(II). , 2007, Angewandte Chemie.

[24]  Huanjun Chen,et al.  Unraveling the Evolution and Nature of the Plasmons in (Au Core)–(Ag Shell) Nanorods , 2012, Advanced materials.

[25]  Jianping Xie,et al.  Highly selective and ultrasensitive detection of Hg(2+) based on fluorescence quenching of Au nanoclusters by Hg(2+)-Au(+) interactions. , 2010, Chemical communications.

[26]  Wang Li,et al.  SERS-fluorescence joint spectral encoding using organic-metal-QD hybrid nanoparticles with a huge encoding capacity for high-throughput biodetection: putting theory into practice. , 2012, Journal of the American Chemical Society.

[27]  Guo-Li Shen,et al.  Electrochemical sensor for mercury(II) based on conformational switch mediated by interstrand cooperative coordination. , 2009, Analytical chemistry.