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Materials Congress 2018
Page 71
Nano Research & Applications
ISSN: 2471-9838
W o r l d C o n g r e s s o n
Materials Science & Engineering
A u g u s t 2 3 - 2 5 , 2 0 1 8
Am s t e r d a m , N e t h e r l a n d s
M
ercury contamination in water is a persistent issue due to both natural geological and anthropogenic activities. Portable,
facile and affordable sensors for detection and sensing different species of mercuries are highly desirable. We report a
highly effective fluorescent, solid state sensor with high sensitivity, good selectivity and excellent reversibility for Hg (II) ion. Hg
(II)-responsive carbon dots immobilised polystyrene spheres were fabricated as a middle layer in double heterostructure colloidal
photonic crystal film. Significant fluorescence enhancement was achieved due to doubly resonant of the modes of photonic
crystals and multi beam interface inside the double heterostructure film. The amplified fluorescence enhances the sensitivity of
detection, achieving a detection limit of 91 pM for Hg(II) ion, even 17 times lower than that of carbon dots solution probe. The
polystyrene-based film sensor is negligibly responsive to other metal ions and can easily be recovered by rinsing with cysteine.
e.eftekhari@griffith.edu.auCarbon nanosensors, from lab-scale research to
commercialized product
Ehsan Eftekhari
1
, Ivan S Cole
2
and Qin Li
1
1
Queensland Micro and Nanotechnology Centre, Griffith University, Australia
2
RMIT University, Australia
Nano Res Appl 2018, Volume: 4
DOI: 10.21767/2471-9838-C4-018