A new silver nanochain SERS analytical platform to detect trace hexametaphosphate with a rhodamine S molecular probe.
Using AgNO3 as the precursor, stable silver nanochain (AgNC) sols, orange-red in color, were prepared using hydrazine hydrate. A strong surface plasmon resonance Rayleigh scattering (RRS) peak occurred at 420 nm plus two surface plasmon resonance (SPR) absorption peaks at 410 nm and 510 nm. Rhodamine S (RhS) cationic dye was absorbed on the as-prepared AgNC substrate to obtain a RhS-AgNC surface-enhanced Raman scattering (SERS) nanoprobe that exhibited a strong SERS peak at 1506 cm(-1) and a strong RRS peak at 375 nm. Upon addition of the analyte sodium hexametaphosphate (HP), it reacted with RhS, which resulted in a decrease in the SERS and RRS peaks that was studied in detail. The decreased SERS and RRS intensities correlated linearly with HP concentration in the range of 0.0125-0.3 µmol/L and 0.05-1.0 µmol/L, with a detection limit of 6 nmol/L and 20 nmol/L HP respectively. Due to advantages of high sensitivity, good selectivity and simple operation, the RhS molecular probes were used to determine HP concentration in real samples.
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry of Education; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin, 541004, China.
Guangyun
G
Shang
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry of Education; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin, 541004, China.
Chongning
C
Li
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry of Education; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin, 541004, China.
Guiqing
G
Wen
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry of Education; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin, 541004, China.
Xinghui
X
Zhang
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry of Education; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin, 541004, China.
Aihui
A
Liang
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry of Education; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin, 541004, China.
Zhiliang
Z
Jiang
D005456:Fluorescent Dyes / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D015335:Molecular Probes / Q000737:chemistry*; D010710:Phosphates / Q000032:analysis*; D012235:Rhodamines / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D020349:Surface Plasmon Resonance
D005456:Fluorescent Dyes; D015335:Molecular Probes; D010710:Phosphates; D012235:Rhodamines; C005035:hexametaphosphate; D012834:Silver
RRS; SERS; hexametaphosphate; rhodamine S; silver nanochain sol