Nanoporous gold based optical sensor for sub-ppt detection of mercury ions

Ling Zhang, Haixin Chang, Akihiko Hirata, Hongkai Wu, Qi Kun Xue, Mingwei Chen

Research output: Contribution to journalArticle

130 Citations (Scopus)

Abstract

Precisely probing heavy metal ions in water is important for molecular biology, environmental protection, and healthy monitoring. Although many methods have been reported in the past decade, developing a quantitative approach capable of detecting sub-ppt level heavy metal ions with high selectivity is still challenging. Here we report an extremely sensitive and highly selective nanoporous gold/aptamer based surface enhanced resonance Raman scattering (SERRS) sensor. The optical sensor has an unprecedented detection sensitivity of 1 pM (0.2 ppt) for Hg2+ ions, the most sensitive Hg2+ optical sensor known so far. The sensor also exhibits excellent selectivity. Dilute Hg2+ ions can be identified in an aqueous solution containing 12 metal ions as well as in river water and underground water. Moreover, the SERRS sensor can be reused without an obvious loss of the sensitivity and selectivity even after 10 cycles.

Original languageEnglish
Pages (from-to)4595-4600
Number of pages6
JournalACS Nano
Volume7
Issue number5
DOIs
Publication statusPublished - 2013 May 28
Externally publishedYes

Fingerprint

Mercury (metal)
Optical sensors
optical measuring instruments
Mercury
Gold
Metal ions
metal ions
selectivity
resonance scattering
Ions
heavy metals
gold
Heavy Metals
Heavy ions
Heavy metals
Raman scattering
sensors
Sensors
heavy ions
Raman spectra

Keywords

  • aptamer
  • mercury ion
  • nanoporous gold (NPG)
  • optical sensor
  • surface enhanced resonance Raman scattering (SERRS)

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Nanoporous gold based optical sensor for sub-ppt detection of mercury ions. / Zhang, Ling; Chang, Haixin; Hirata, Akihiko; Wu, Hongkai; Xue, Qi Kun; Chen, Mingwei.

In: ACS Nano, Vol. 7, No. 5, 28.05.2013, p. 4595-4600.

Research output: Contribution to journalArticle

Zhang, L, Chang, H, Hirata, A, Wu, H, Xue, QK & Chen, M 2013, 'Nanoporous gold based optical sensor for sub-ppt detection of mercury ions', ACS Nano, vol. 7, no. 5, pp. 4595-4600. https://doi.org/10.1021/nn4013737
Zhang, Ling ; Chang, Haixin ; Hirata, Akihiko ; Wu, Hongkai ; Xue, Qi Kun ; Chen, Mingwei. / Nanoporous gold based optical sensor for sub-ppt detection of mercury ions. In: ACS Nano. 2013 ; Vol. 7, No. 5. pp. 4595-4600.
@article{df3959d6bc3547d4a3cf18d3aabe5ffe,
title = "Nanoporous gold based optical sensor for sub-ppt detection of mercury ions",
abstract = "Precisely probing heavy metal ions in water is important for molecular biology, environmental protection, and healthy monitoring. Although many methods have been reported in the past decade, developing a quantitative approach capable of detecting sub-ppt level heavy metal ions with high selectivity is still challenging. Here we report an extremely sensitive and highly selective nanoporous gold/aptamer based surface enhanced resonance Raman scattering (SERRS) sensor. The optical sensor has an unprecedented detection sensitivity of 1 pM (0.2 ppt) for Hg2+ ions, the most sensitive Hg2+ optical sensor known so far. The sensor also exhibits excellent selectivity. Dilute Hg2+ ions can be identified in an aqueous solution containing 12 metal ions as well as in river water and underground water. Moreover, the SERRS sensor can be reused without an obvious loss of the sensitivity and selectivity even after 10 cycles.",
keywords = "aptamer, mercury ion, nanoporous gold (NPG), optical sensor, surface enhanced resonance Raman scattering (SERRS)",
author = "Ling Zhang and Haixin Chang and Akihiko Hirata and Hongkai Wu and Xue, {Qi Kun} and Mingwei Chen",
year = "2013",
month = "5",
day = "28",
doi = "10.1021/nn4013737",
language = "English",
volume = "7",
pages = "4595--4600",
journal = "ACS Nano",
issn = "1936-0851",
publisher = "American Chemical Society",
number = "5",

}

TY - JOUR

T1 - Nanoporous gold based optical sensor for sub-ppt detection of mercury ions

AU - Zhang, Ling

AU - Chang, Haixin

AU - Hirata, Akihiko

AU - Wu, Hongkai

AU - Xue, Qi Kun

AU - Chen, Mingwei

PY - 2013/5/28

Y1 - 2013/5/28

N2 - Precisely probing heavy metal ions in water is important for molecular biology, environmental protection, and healthy monitoring. Although many methods have been reported in the past decade, developing a quantitative approach capable of detecting sub-ppt level heavy metal ions with high selectivity is still challenging. Here we report an extremely sensitive and highly selective nanoporous gold/aptamer based surface enhanced resonance Raman scattering (SERRS) sensor. The optical sensor has an unprecedented detection sensitivity of 1 pM (0.2 ppt) for Hg2+ ions, the most sensitive Hg2+ optical sensor known so far. The sensor also exhibits excellent selectivity. Dilute Hg2+ ions can be identified in an aqueous solution containing 12 metal ions as well as in river water and underground water. Moreover, the SERRS sensor can be reused without an obvious loss of the sensitivity and selectivity even after 10 cycles.

AB - Precisely probing heavy metal ions in water is important for molecular biology, environmental protection, and healthy monitoring. Although many methods have been reported in the past decade, developing a quantitative approach capable of detecting sub-ppt level heavy metal ions with high selectivity is still challenging. Here we report an extremely sensitive and highly selective nanoporous gold/aptamer based surface enhanced resonance Raman scattering (SERRS) sensor. The optical sensor has an unprecedented detection sensitivity of 1 pM (0.2 ppt) for Hg2+ ions, the most sensitive Hg2+ optical sensor known so far. The sensor also exhibits excellent selectivity. Dilute Hg2+ ions can be identified in an aqueous solution containing 12 metal ions as well as in river water and underground water. Moreover, the SERRS sensor can be reused without an obvious loss of the sensitivity and selectivity even after 10 cycles.

KW - aptamer

KW - mercury ion

KW - nanoporous gold (NPG)

KW - optical sensor

KW - surface enhanced resonance Raman scattering (SERRS)

UR - http://www.scopus.com/inward/record.url?scp=84878328776&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84878328776&partnerID=8YFLogxK

U2 - 10.1021/nn4013737

DO - 10.1021/nn4013737

M3 - Article

VL - 7

SP - 4595

EP - 4600

JO - ACS Nano

JF - ACS Nano

SN - 1936-0851

IS - 5

ER -