SNL  Vol.4 No.3 , July 2014
Synthesis of Luminescent CdTe Nanorods on Anodized Aluminum Oxide Template and Their Utility in Divalent Heavy Metal Ion Sensing

A simple one-pot hydrothermal method to grow luminescent CdTe nanorods on porous anodized aluminum oxide (AAO) template is described. These CdTe nanorods on the AAO template were further applied as an optical probe to detect divalent heavy metal ions such as Hg, Pb, Mg and Zn, by examining its photoluminescence (PL) responses. The presence of Pb and Hg ions quenched the photoluminescence (PL) of the CdTe nanorods where as Zn and Mg ions enhanced it with the effect of red shift in the peak position respectively. These PL enhancements/quenching of the nanorods after exposing to the divalent ions were explained on the basis of the active surface related recombination, which depends on the direction of carrier transfer mechanism i.e. from nanorods to the surface adsorbed metal ions or vice-versa and is attributed to the alignment of bands thus formed. The luminescent CdTe nanorods grown on AAO template was found to be effective in sensing metal ions (Pb, Hg, Zn and Mg) up to a micro-molar concentration.

Cite this paper
Gyanan and Khatei, J. (2014) Synthesis of Luminescent CdTe Nanorods on Anodized Aluminum Oxide Template and Their Utility in Divalent Heavy Metal Ion Sensing. Soft Nanoscience Letters, 4, 69-74. doi: 10.4236/snl.2014.43010.
[1]   Aragay, G., Pino, F. and Merkoci, A. (2012) Nanomaterials for Sensing and Destroying Pesticides. Chemical Reviews, 112, 5317-5338.

[2]   Huang, X.J. and Choi, Y.K. (2007) Chemical Sensors Based on Nanostructured Materials. Sensors and Actuators B, 122, 659-671. /10.1016/j.snb.2006.06.022

[3]   Luo, L., Jie, J., Zhang, W., He, Z., Wang, J., Yuan, G., Zhang, W., Wu, L.C.M. and Lee, S.T. (2009) Silicon Nanowire Sensors for Hg2+ and Cd2+ Ions. Applied Physics Letters, 94, 193101.

[4]   Sudibya, H.G., He, Q., Zhang, H. and Chen, P. (2011) Electrical Detection of Metal Ions Using Field-Effect Transistors Based on Micropatterned Reduced Graphene Oxide Films. ACS Nano., 5, 1990-1994.

[5]   González, B.M., Christie, G., Davidson, C.A.B., Blyth, J. and Lowe, C.R. (2005) Divalent Metal Ion-Sensitive Holographic Sensors. Analytica Chimica Acta, 528, 219-228.

[6]   Duffus, J.H. (2002) Heavy Metal-A Meaningless Term? Pure and Applied Chemistry, 74, 793-807.

[7]   Aragay, G., Pons, J. and Merkoci, A. (2011) Recent Trends in Macro-, Micro-, and Nanomaterials-Based Tools and Strategies for Heavy-Metal Detection. Chemical Reviews, 111, 3433-3458.

[8]   Li., M., Gou, H.L., Al-Ogaidi., I. and Wu, N.Q. (2013) Nanostructured Sensors dor Detection of Heavy Metals: A Review. ACS Sustainable Chemistry Engineering, 1, 713-723.

[9]   Li, Y.D., Duan, X.F., Qian, Y.T., Yang, L., Ji, M.R. and Li, C.W. (1997) Solvothermal Co-Reduction Route to the Nanocrystalline III-V Semiconductor InAs. Journal of the American Chemical Society, 119, 7869-7870.

[10]   Peng, Q., Dong, Y.J., Deng, Z.X. and Li, Y.D. (2002) Selective Synthesis and Characterization of CdSe Nanorods and Fractal Nanocrystals. Inorganic Chemistry, 41, 5249.

[11]   Duan, X.F. and Lieber, C.M. (2000) General Synthesis of Compound Semiconductor Nanowires. Advanced Materials, 12, 298-302.

[12]   Gates, B., Yin, Y.D. and Xia, Y.N. (2000) A Solution-Phase Approach to the Synthesis of Uniform Nanowires of Crystalline Selenium with Lateral Dimensions in the Range of 10-30 nm. Journal of the American Chemical Society, 122, 12582.

[13]   Huang, M.H., Mao, S., Feick, H., Yan, H.Q., Wu, Y.Y., Kind, H., Weber, E., Russo, R. and Yang, P.D. (2001) Room-Temperature Ultraviolet Nanowire Nanolasers. Science, 292, 897.

[14]   Anderson, M., Iline, A., Stietz, F. and Trager, F. (1999) Formation of Gold Nanowires through Self Assembly during Scanning Force Microscopy. Applied Physics A, 68, 609.

[15]   Palasantzas, G., Ilge, B., de Nijs, J. and Geerligs, L.J. (1999) Fabrication of Co/Si Nanowires by Ultrahigh-Vacuum Scanning Tunneling Microscopy on Hydrogen-Passivated Si (100) Surfaces. Journal of Applied Physics, 85, 1907.

[16]   Iijima, S. (1991) Helical Microtubules of Graphitic Carbon. Nature, 56, 354.

[17]   Yu, D.P., Lee, C.S., Bello, I., Sun, X.S., Tang, Y.H., Zhou, G., Bai, Z.G. and Feng, S.Q. (1998) Synthesis of Nano-scale Silicon Wires by Excimer Laser Ablation at High Temperature. Solid State Communication, 105, 403. /10.1016/S0038-1098(97)10143-0

[18]   Martin, C.R. (1994) Nanomaterials: A Membrane-Based Synthetic Approach. Science, 266, 1961.

[19]   Yang J., Li., G.G., Peng, C., Li., C.X., Zhang, C.M., Fan., Y., Xu., Z.H., Cheng, Z.Y. and Lin, J. (2010) Homogeneous one-Dimensional Structured Tb(OH)3:Eu3+ Nanorods: Hydrothermal Synthesis, Energy Transfer, and Tunable Luminescence Properties. Journal of Solid State Chemistry, 183, 451-457.

[20]   Riveros, G., Vásquez, J., Gómez, H., Makarova, T., Silva, D., Marotti, R.E. and Dalchiele, E.A. (2008) Single-Step Electrodeposition of Polycrystalline CdSe Microwire Array: Structural and Optical Properties. Applied Physics A, 90, 423-430.

[21]   Zhang, C., Tao, F., Liu, G.Q., Yao, L.Z. and Cai, W.L. (2008) Hydrothermal Synthesis of Oriented MnS Nanorods on Anodized Aluminum Oxide Template. Materials Letters, 62, 246-248.

[22]   Xi, G.C., Wang, C., Wang, X., Qian, Y.T. and Xiao, H.Q. (2008) Te/Carbon and Se/Carbon Nanocables: Size-Controlled in Situ Hydrothermal Synthesis and Applications in Preparing Metal M/Carbon Nanocables (M = Tellurides and Selenides). The Journal of Physical Chemistry C, 112, 965-971.

[23]   Liang, X.R., Tan, S.S., Tang, Y.Z. and Kotov, N.A. (2004) Investigation of Transversal Conductance in Semiconductor CdTe Nanowires with and without a Coaxial Silica Shell. Langmuir, 20, 1016-1020.

[24]   Duan, J., Song, L.X. and Zhan, J.H. (2009) One-Pot Synthesis of Highly Luminescent CdTe Quantum Dots by Microwave Irradiation Reduction and Their Hg2+-Sensitive Properties. Nano Research, 2, 61-68.

[25]   Pendyala, N.B. and Koteswara Rao, K.S.R. (2009) Efficient Hg and Ag Ion Detection with Luminescent PbS Quantum Dots Grown in Poly Vinyl Alcohol and Capped with Mercaptoethanol. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 339, 43-47.

[26]   Xie, H.Y., Liang, J.G., Zhang. Z,L., Liu, Y., He, Z.K. and Pang, D.W. (2004) Luminescent CdSe-ZnS Quantum Dots as Selective Cu2+ Probe. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 60, 2527-2530.