Journal
ACS NANO
Volume 7, Issue 5, Pages 4595-4600Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn4013737
Keywords
nanoporous gold (NPG); surface enhanced resonance Raman scattering (SERRS); aptamer; mercury ion; optical sensor
Categories
Funding
- World Premier International Research Center (WPI) Initiative by the MEXT
- JST-CREST Interface Science for Highly Efficient Energy Utilization
- JST, Japan
Ask authors/readers for more resources
Precisely probing heavy metal ions in water is important for molecular biology, environmental protection, and healthy monitoring. Although many methods have been reported in the past decade, developing a quantitative approach capable of detecting sub-ppt level heavy metal ions with high selectivity Is still challenging. Here we report an extremely sensitive and highly selective nanoporous gold/aptamer based surface enhanced resonance Raman scattering (SERRS) sensor. The optical sensor has an unprecedented detection sensitivity of 1 pM (0.2 ppt) for Hg2+ ions, the most sensitive Hg2+ optical sensor known so far. The sensor also exhibits excellent selectivity. Dilute Hg2+ ions can be identified in an aqueous solution containing 12 metal ions as well as in river water and underground water. Moreover, the SERRS sensor can be reused without an obvious loss of the sensitivity and selectivity even after 10 cycles.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available