Please use this identifier to cite or link to this item:
|Title:||Salen derivatives functionalized CdSe-ZnS quantum dots as fluorescent probes for selective Cu(II) and Fe(II) sensing||Authors:||Ganguly, R.
|Issue Date:||Sep-2010||Citation:||Ganguly, R., Wang, S., Huang, D. (2010-09). Salen derivatives functionalized CdSe-ZnS quantum dots as fluorescent probes for selective Cu(II) and Fe(II) sensing. Nanoscience and Nanotechnology Letters 2 (3) : 208-212. ScholarBank@NUS Repository. https://doi.org/10.1166/nnl.2010.1060||Abstract:||The surface of luminescent semiconductor quantum dots CdSe-ZnS was successfully grafted with multidentate ligand, Salen, to give quantum dot-Salen through condensation reaction between surface amine and salicylic aldehyde. This hybrid material possesses the characteristics of stable and narrow photoluminescence at ∼610 nm in water and organic polar solvents. It exhibits selective metal sensing toward certain transition metals such as Fe(II) and Cu(II) by photoluminescence quenching with estimated limit of detection of about 30 μM and 25 μM, repectively. The selective sensing of ferrous ions could be attributed to the fluorescence energy transfer between the quantum dots and the surface ferrous Salen complexes because the absorption spectra of the surface metal complexes overlap with the emission wavelength of the quantum dots. On the other hand, the selective sensing of copper can be attributed to both the fluorescence energy transfer and surface adsorption mechanism, but the latter quenching path is dominant which is supported by the fluorescence quenchig behavior. Copyright © 2010 American Scientific Publishers.||Source Title:||Nanoscience and Nanotechnology Letters||URI:||http://scholarbank.nus.edu.sg/handle/10635/76915||ISSN:||19414900||DOI:||10.1166/nnl.2010.1060|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on May 27, 2020
WEB OF SCIENCETM
checked on May 18, 2020
checked on May 31, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.