A Fiber-Optic Sensor Based on Plasmon Coupling Effects inGold Nanoparticles Core-Satellites Nanostructures for Detection of Mercury Ions / 分析化学
Chinese Journal of Analytical Chemistry
; (12): 785-790, 2017.
Artigo
em Chinês
| WPRIM (Pacífico Ocidental)
| ID: wpr-619968
Biblioteca responsável:
WPRO
ABSTRACT
Based on the plasmon coupling effect in gold nanoparticles core-satellite nanostructures linked by thymine(T)-rich DNA hybridization and the specific Hg2+-mediated T-Hg2+-T base pair, a novel localized surface plasmon resonance (LSPR) optical fiber sensor was proposed and developed for Hg2+ detection in water.The Hg2+-induced conformational change in T-rich DNA sequence inhibited the DNA hybridization reaction, weakened the plasmon coupling effect and leaded to the change of LSPR resonance wavelength.The concentration of Hg2+ was quantitatively determined by the resonance wavelength redshift.The linear range of Hg2+ detection was about 5-150 nmol/L with LOD about 3.4 nmol/L.The specificity of the sensor was proved great by evaluating the response to other heavy metal ions such as Zn2+, Mg2+, Pb2+ and so on.This sensor was applied in environmental water detection by standard addition method,with the RSD less than 4.8% and recoveries of 94.2%-105.4%.
Texto completo:
Disponível
Base de dados:
WPRIM (Pacífico Ocidental)
Tipo de estudo:
Estudo diagnóstico
Idioma:
Chinês
Revista:
Chinese Journal of Analytical Chemistry
Ano de publicação:
2017
Tipo de documento:
Artigo