Colorimetric Detection of Mercury Species Based on Functionalized Gold Nanoparticles

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	Colorimetric Detection of Mercury Species Based on Functionalized Gold Nanoparticles
	Chen, Ling 1,2,3; Li, Jinhua1 ; Chen, Lingxin1
刊名	ACS APPLIED MATERIALS & INTERFACES
	2014-09-24
卷号	6 期号:18 页码:15897-15904
关键词	mercury speciation analysis colorimetric detection gold nanoparticles aggregation
ISSN号	1944-8244
通讯作者	Chen, LX (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China. lxchen@yic.ac.cn
产权排序	[Chen, Ling; Li, Jinhua; Chen, Lingxin] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China; [Chen, Ling] Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China; [Chen, Ling] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
中文摘要	The speciation analysis of heavy metal pollutants is very important because different species induce different toxicological effects. Nanomaterial-assisted optical sensors have achieved rapid developments, displaying wide applications to heavy metal ions but few to metal speciation analysis. In this work, a novel colorimetric nanosensor strategy for mercury speciation was proposed for the first time, based on the analyte-induced aggregation of gold nanoparticles (Au NPs) with the assistance of a thiol-containing ligand of diethyldithiocarbannate (DDTC). Upon the addition of mercury species, because Hg-DDTC was more stable than Cu-DDTC, a place-displacement between Hg species and Cu2+ would occur, and thereby the fiinctionalized Au NPs would aggregate, resulting in a color change. Moreover, by virtue of the masking effect of ethylenediaminetetraacetic acid (EDTA), the nanosensor could readily discriminate organic mercury and inorganic mercury (Hg2+), and it is thus anticipated to shed some light on the colorimetric sensing of organic mercury. So, a direct, simple colorimetric assay for selective determination of Hg species was obtained, presenting high detectability, such as up to 10 nM for Hg2+ and IS nM for methylmercury. Meanwhile, the strategy offered excellent selectivity toward mercury species against other metal ions. The simple, rapid, and sensitive label-free colorimetric sensor for the determination of Hg species provided an attractive alternative to conventional methods, which usually involve sophisticated instruments, complicated processes, and long periods of time. More importantly, by using mercury as a model, an excellent nanomaterial-based optical sensing platform can be developed for speciation analysis of trace heavy metals, which can lead to nanomaterials stability change through smart functionalization and reasonable interactions.
英文摘要	The speciation analysis of heavy metal pollutants is very important because different species induce different toxicological effects. Nanomaterial-assisted optical sensors have achieved rapid developments, displaying wide applications to heavy metal ions but few to metal speciation analysis. In this work, a novel colorimetric nanosensor strategy for mercury speciation was proposed for the first time, based on the analyte-induced aggregation of gold nanoparticles (Au NPs) with the assistance of a thiol-containing ligand of diethyldithiocarbannate (DDTC). Upon the addition of mercury species, because Hg-DDTC was more stable than Cu-DDTC, a place-displacement between Hg species and Cu2+ would occur, and thereby the fiinctionalized Au NPs would aggregate, resulting in a color change. Moreover, by virtue of the masking effect of ethylenediaminetetraacetic acid (EDTA), the nanosensor could readily discriminate organic mercury and inorganic mercury (Hg2+), and it is thus anticipated to shed some light on the colorimetric sensing of organic mercury. So, a direct, simple colorimetric assay for selective determination of Hg species was obtained, presenting high detectability, such as up to 10 nM for Hg2+ and IS nM for methylmercury. Meanwhile, the strategy offered excellent selectivity toward mercury species against other metal ions. The simple, rapid, and sensitive label-free colorimetric sensor for the determination of Hg species provided an attractive alternative to conventional methods, which usually involve sophisticated instruments, complicated processes, and long periods of time. More importantly, by using mercury as a model, an excellent nanomaterial-based optical sensing platform can be developed for speciation analysis of trace heavy metals, which can lead to nanomaterials stability change through smart functionalization and reasonable interactions.
学科主题	Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
研究领域[WOS]	Science & Technology - Other Topics ; Materials Science
关键词[WOS]	ATOMIC-ABSORPTION-SPECTROMETRY ; CAPILLARY-ELECTROPHORESIS ; INORGANIC MERCURY ; VISUAL DETECTION ; AQUEOUS-MEDIA ; WATER SAMPLES ; SPECIATION ; HG2+ ; IONS ; PRECONCENTRATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000342328300033
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/8708]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
作者单位	1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China 2.Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chen, Ling,Li, Jinhua,Chen, Lingxin. Colorimetric Detection of Mercury Species Based on Functionalized Gold Nanoparticles[J]. ACS APPLIED MATERIALS & INTERFACES,2014,6(18):15897-15904.
APA	Chen, Ling,Li, Jinhua,&Chen, Lingxin.(2014).Colorimetric Detection of Mercury Species Based on Functionalized Gold Nanoparticles.ACS APPLIED MATERIALS & INTERFACES,6(18),15897-15904.
MLA	Chen, Ling,et al."Colorimetric Detection of Mercury Species Based on Functionalized Gold Nanoparticles".ACS APPLIED MATERIALS & INTERFACES 6.18(2014):15897-15904.