Gold nanoparticles generated through "green route'' bind Hg2+ with a concomitant blue shift in plasmon absorption peak
| dc.contributor | Radhakumary, C. | |
| dc.contributor | Sreenivasan, K. | |
| dc.date.accessioned | 2012-12-04T11:44:13Z | |
| dc.date.available | 2012-12-04T11:44:13Z | |
| dc.date.issued | 2011 | |
| dc.description.abstract | We discuss here a quick, simple, economic and ecofriendly method through a completely green route for the selective detection of Hg2+ in aqueous samples. Here we exploited the ability of chitosan to generate gold nanoparticles and subsequently to act as a stabilizer for the formed nanoparticles. When chitosan stabilized gold nanoparticles (CH-Au NPs) are interacted with Hg2+ a blue shift for its localized surface plasmon resonance absorbance (LSPR) band is observed. The blue shift is reasoned to be due to the formation of a thin layer of mercury over gold. A concentration as low as 0.01 ppm to a maximum of 100 ppm Hg2+ can be detected based on this blue shift of the CH-Au NPs. While all other reported methods demand complex reaction steps and costly chemicals, the method we reported here is a simple, rapid and selective approach for the detection of Hg2+. Our results also show that the CH-Au NPs have excellent selectivity to Hg2+ over common cations namely, Pb2+, Cd2+, Mn2+, Fe2+, Ag1+, Ce4+, Ni2+, and Cu2+. | |
| dc.identifier.citation | ANALYST. 136; 14; 2959-2962 | en_US |
| dc.identifier.uri | http://dx.doi.org/10.1039/c1an15247e | |
| dc.identifier.uri | https://dspace.sctimst.ac.in/handle/123456789/553 | |
| dc.publisher | ANALYST | |
| dc.subject | Biocompatibility | |
| dc.title | Gold nanoparticles generated through "green route'' bind Hg2+ with a concomitant blue shift in plasmon absorption peak |