Plasmonic Semiconductor Nanocrystals as Chemical Sensors: Pb2+ Quantitation via Aggregation-Induced Plasmon Resonance Shift

Moran Guo; Wing Cheung Law; Xin Liu; Hongxin Cai; Liwei Liu; Mark T. Swihart; Xihe Zhang; Paras N. Prasad

doi:10.1007/s11468-014-9694-3

Plasmonic Semiconductor Nanocrystals as Chemical Sensors: Pb²⁺ Quantitation via Aggregation-Induced Plasmon Resonance Shift

Moran Guo
, Wing Cheung Law
, Xin Liu
, Hongxin Cai
, Liwei Liu
, Mark T. Swihart
, Xihe Zhang
, Paras N. Prasad

Changchun University of Science and Technology
SUNY Buffalo
Hong Kong Polytechnic University

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

We demonstrate, for the first time, the use of plasmonic semiconductor nanocrystals for the analysis of heavy metal ions in water. This highly sensitive localized surface plasmon resonance (LSPR)-based platform is built on glutathione (GSH) capped Cu_2-xS nanocrystals, which exhibit LSPR at near infrared (NIR) wavelengths. Aggregation of GSH-capped Cu_2-xS occurs specifically in the presence of lead ions, Pb²⁺, producing a shift in the LSPR absorbance peak. Under optimal assay conditions, the detection limit was as low as 0.25 μM (52.5 ppb) of Pb²⁺. This provides a new plasmonic semiconductor nanocrystal-based assay for the detection of environmentally hazardous materials. The assay employs non-toxic and earth-abundant elements and could potentially be produced at much lower cost than similar gold nanoparticle-based assays.

Original language	English
Pages (from-to)	893-898
Number of pages	6
Journal	Plasmonics
Volume	9
Issue number	4
DOIs	https://doi.org/10.1007/s11468-014-9694-3
State	Published - Aug 2014

Keywords

Aggregation-induced detection
Copper sulfide
Heavy metal ion
Plasmonics
Semiconductor nanocrystals

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10.1007/s11468-014-9694-3

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title = "Plasmonic Semiconductor Nanocrystals as Chemical Sensors: Pb2+ Quantitation via Aggregation-Induced Plasmon Resonance Shift",

abstract = "We demonstrate, for the first time, the use of plasmonic semiconductor nanocrystals for the analysis of heavy metal ions in water. This highly sensitive localized surface plasmon resonance (LSPR)-based platform is built on glutathione (GSH) capped Cu2-xS nanocrystals, which exhibit LSPR at near infrared (NIR) wavelengths. Aggregation of GSH-capped Cu2-xS occurs specifically in the presence of lead ions, Pb2+, producing a shift in the LSPR absorbance peak. Under optimal assay conditions, the detection limit was as low as 0.25 μM (52.5 ppb) of Pb2+. This provides a new plasmonic semiconductor nanocrystal-based assay for the detection of environmentally hazardous materials. The assay employs non-toxic and earth-abundant elements and could potentially be produced at much lower cost than similar gold nanoparticle-based assays.",

keywords = "Aggregation-induced detection, Copper sulfide, Heavy metal ion, Plasmonics, Semiconductor nanocrystals",

author = "Moran Guo and Law, \{Wing Cheung\} and Xin Liu and Hongxin Cai and Liwei Liu and Swihart, \{Mark T.\} and Xihe Zhang and Prasad, \{Paras N.\}",

year = "2014",

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doi = "10.1007/s11468-014-9694-3",

language = "English",

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T1 - Plasmonic Semiconductor Nanocrystals as Chemical Sensors

T2 - Pb2+ Quantitation via Aggregation-Induced Plasmon Resonance Shift

AU - Guo, Moran

AU - Law, Wing Cheung

AU - Liu, Xin

AU - Cai, Hongxin

AU - Liu, Liwei

AU - Swihart, Mark T.

AU - Zhang, Xihe

AU - Prasad, Paras N.

PY - 2014/8

Y1 - 2014/8

N2 - We demonstrate, for the first time, the use of plasmonic semiconductor nanocrystals for the analysis of heavy metal ions in water. This highly sensitive localized surface plasmon resonance (LSPR)-based platform is built on glutathione (GSH) capped Cu2-xS nanocrystals, which exhibit LSPR at near infrared (NIR) wavelengths. Aggregation of GSH-capped Cu2-xS occurs specifically in the presence of lead ions, Pb2+, producing a shift in the LSPR absorbance peak. Under optimal assay conditions, the detection limit was as low as 0.25 μM (52.5 ppb) of Pb2+. This provides a new plasmonic semiconductor nanocrystal-based assay for the detection of environmentally hazardous materials. The assay employs non-toxic and earth-abundant elements and could potentially be produced at much lower cost than similar gold nanoparticle-based assays.

AB - We demonstrate, for the first time, the use of plasmonic semiconductor nanocrystals for the analysis of heavy metal ions in water. This highly sensitive localized surface plasmon resonance (LSPR)-based platform is built on glutathione (GSH) capped Cu2-xS nanocrystals, which exhibit LSPR at near infrared (NIR) wavelengths. Aggregation of GSH-capped Cu2-xS occurs specifically in the presence of lead ions, Pb2+, producing a shift in the LSPR absorbance peak. Under optimal assay conditions, the detection limit was as low as 0.25 μM (52.5 ppb) of Pb2+. This provides a new plasmonic semiconductor nanocrystal-based assay for the detection of environmentally hazardous materials. The assay employs non-toxic and earth-abundant elements and could potentially be produced at much lower cost than similar gold nanoparticle-based assays.

KW - Aggregation-induced detection

KW - Copper sulfide

KW - Heavy metal ion

KW - Plasmonics

KW - Semiconductor nanocrystals

UR - https://www.scopus.com/pages/publications/84895932190

U2 - 10.1007/s11468-014-9694-3

DO - 10.1007/s11468-014-9694-3

M3 - Article

AN - SCOPUS:84895932190

SN - 1557-1955

VL - 9

SP - 893

EP - 898

JO - Plasmonics

JF - Plasmonics

IS - 4

ER -

Plasmonic Semiconductor Nanocrystals as Chemical Sensors: Pb²⁺ Quantitation via Aggregation-Induced Plasmon Resonance Shift

Abstract

Keywords

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