Highly Sensitive Detection of Trace Hg²⁺ Based on Fine CdS Nanodots Grew from a DNA-Directed Alternate Dialysis Method

Abstract:

Fine CdS nanodots (~5 nm) have been prepared in aqueous solution under the control of ds-DNA via a novel alternating dialysis procedure, which have been characterized by TEM, UV-vis, fluorescence (FL) and resonance light scattering (RLS) spectra. The resultant well-dispersed CdS nanodots present a strong FL peak at 339 nm and RLS bands around 394 nm. Interestingly, it was found that the quenching of FL and the enhancing of RLS intensity are dependent on the concentration of Hg²⁺, both of which showed good linear relationship over the range of 0.01-100 mmol/L, with a detection limit (3s) as low as 0.91 nmol/L. Good selectivity of this method for Hg²⁺ analysis has also been checked over other metal ions.

• Periodical: Advanced Materials Research (Volumes 239-242)
• Pages: 536-539
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.239-242.536
• Online since: May 2011
• Authors: Shu Chen, Quan He, Jian Tang, Shan Bai, Yun Fei Long
• Keywords: Cds Nanodot, Dialysis, Fluorescence, Hg ²⁺, Resonance Light Scattering

References

[1] E.M. Nolan and S.J. Lippard: Chem. Rev. Vol. 108 (2008), p.3443

[2] J. Mutter, J. Naumann, R. Schneider, H. Walach and B. Haley: Neuro. Endocrinol. Lett. Vol. 26 (2005) p.439

[3] O.T. Butler, J.M. Cook, C.F. Harrington, S.J. Hill, J. Rieuwerts and D.L. Miles: J. Anal. At. Spectrom. Vol. 21 (2006), p.217

[4] Y.F. Li, C.Y. Chen, B. Li, J. Sun, J.X. Wang, Y.X. Gao, Y.L. Zhao and Z.F. Chai: J. Anal. At. Spectrom. Vol. 21 (2006), p.94

[5] M. Leermakers, W. Baeyens, P. Quevauviller and M. Horvat: Trends Anal. Chem. Vol. 24 (2005), p.383

[6] J.-S. Lee, M. S. Han and C. A. Mirkin: Angew. Chem. Int. Ed. Vol. 46 (2007), p.4093

[7] X.-J. Xue, F. Wang and X.-G. Liu: J. Am. Chem. Soc. Vol. 130 (2008), p.3244

[8] C. Zhu, L. Li, F. Fang, J. Chen and Y. Wu: Chem. Lett. Vol. 34 (2005), p.898

[9] N. Ma, J. Yang, K.M. Stewart and S.O. Kelley: Langmuir Vol. 23 (2007), p.12783

[10] J. P. Xie, Y.G. Zheng and J.Y. Ying: Chem. Commun. Vol. 46 (2010), p.961

[11] C.-C. Huang and H.-T. Chang: Anal. Chem Vol. 78 (2006), p.8332

[12] C.-W. Liu, C.-C. Huang and H.-T. Chang: Langmuir Vol. 24 (2008), p.8346

[13] C.-J. Yu and W.-L. Tseng: Langmuir Vol. 24 (2008), p.12717

[14] J.-S. Lee, M. S. Han and C. A. Mirkin: Angew. Chem. Int. Ed. Vol. 46 (2007), p.4093

[15] Y. Fan, Y.F. Long and Y.F. Li: Anal. Chim. Acta Vol. 653 (2009), p.207

[16] A. Ono and H. Togashi: Angew. Chem. Int. Ed. Vol. 43 (2004), p.4300

[17] X. Liu, Y. Tang, L. Wang, J. Zhang, S. Song, C. Fan and S. Wang: Adv. Mater. Vol. 19 (2007), p.1471

[18] Y.F. Long, D.L. Jiang, X. Zhu, J.X. Wang and F.M. Zhou: Anal. Chem. Vol. 81 (2009), p.2652

[19] B. Chen, Y. Yu, Z. Zhou and P. Zhong: Chem. Lett. Vol. 33 (2004), p.1608

[20] C. Zhu, L. Li, F. Fang, J. Chen and Y. Wu: Chem. Lett. Vol. 34 (2005), p.898

[21] L. Berti, A. Alessandrini, M. Bellesia and P. Facci: Langmuir Vol. 23 (2007), p.10891

[22] A.K. Brian and G.M. Harold: Langmuir Vol. 16 (2000), p.3588

[23] D.C. Harris: Quantitative Chemical Analysis, 7th ed. (W. H. Freeman & Co., New York 2007).