Research of decanethiol-modified Au/Ag SERS substrates for the detection of polychlorinated biphenyl-77

Abstract

Abstract:

A “sphere plus plate”-composed Au/Ag nanostructure arrays with strong Surface-enhanced Raman scattering (SERS) activity are fabricated through the templated method, and the SERS spectrum of polychlorinated biphenyl-77(PCB-77) based on this nanostructure is investigated. The results indicate that the characteristic Raman-shift peaks of PCB-77 may be observed with the bare SERS substrate, but the signal-to-noise ratio of SERS Spectrum is too low. By functionalization-modifying decanethiol (DT) on the surface of the bare SERS substrate with the help of the interaction between the –SH group of DT and novel metals, the SERS spectrum of PCB-77 is obviously improved. With the optimal functionalization-modified SERS substrate which is soaked in the DT solution for 36 hours, and the characteristic Raman-shift peaks’ intensity of the SERS spectrum of PCB-77 gets enhanced greatly.

Key words: spectroscopy, nano-structured arrays, SERS, functionalization -modified, PCB-77

CLC Number:

O433

ZHANG Yuanyun, ZHANG Xingfang, CAO Jie, MAO Qing-he. Research of decanethiol-modified Au/Ag SERS substrates for the detection of polychlorinated biphenyl-77[J]. J4, 2012, 29(3): 357-361.

References

[1] Chu Shaogang, Xu Xiaobai, et al. Tran&port and distribution of polychlorinated biphenyls in a pollution area [J]. Acta Scientiare Circumstantiae(环境科学学报), 1995,15(4):423-431.(in Chinese)
[2] Ross G. The public health implications of polychlorinated biphenyls (PCBs) in the environment [J]. Ecotoxic. Environ. Safe. 2004,59,275-291.
[3] Pitarch E, Serrano R, et al. Rapid multiresidue determination of organochlorine and organo-phosphorus compounds in human serum by solid-phase extraction and gas chromatography coupled to tandem mass spectrometry [J].Anal. Bioanal. Chem. 2003,376,189-197.
[4] Deng QL, Li H, et al. Aromatic compounds separation and detection by tandem gas chromatography and photoionization ion mobility spectrometry [J]. Chinese Journal of Quantum Electronics (量子电子学报), 2011, 28, 12-18 (in Chinese).
[5] Hong JE, Pyo H, Park S, et al. Determination of hydroxyl-PCBs in urine by gas chromatography/mass spectrometry with solid-phase extraction and derivatization [J]. Anal. Chim. Acta, 2005,531,249-256.
[6] Zheng RS, Lu YH, et al. Recent progress of research on surface plasmon resonance sensors [J]. Chinese Journal of Quantum Electronics (量子电子学报), 2008, 25, 657-664 (in Chinese).
[7] Moskovits M. Surface-enhanced spectroscopy [J]. Rev. Mod. Phys, 1985,57,783-826.
[8] Wang, Y, Li YS, et al. Surface-enhanced Raman scattering of some water insolubie drugs in silver hydrosols [J]. Spectrochim. Acta A, 2003,59,589-594.
[9] Leyton P, Cordova I, Lizama-Vergara PA, et al. Humic acids as molecular assembles in the surface-enhanced Raman scattering detection of polycyclic aromatic hydro-carbons [J]. Vibrational Spectroscopy, 2008,46:77-81.
[10] Guerrini L, Garcia-Ramos JV, et al. Sensing Polycyclic Aromatic Hydrocarbons with Dithiocarbamate-Functionalized Ag Nanoparticles by Surface-Enhanced Raman Scattering [J]. Analytical Chemistry, 2009,81: 953-960.
[11] Kottmann JP, Smith DR, Schultz S. Plasmon resonances of silver nanowires with a nonregular cross section [J].Phys. Rev. B,2001,64(23):235402-1—235402-10.
[12] Bantz KC, Haynes CL. Surface-enhanced Raman scattering detection and discrimination of polychlorinated biphenyls [J]. Vibrational Spectroscopy, 2009,50:29-35.
[13] Stiles PL, Dieringer JA, et al. Surface-Enhanced Raman Spectroscopy [J]. Annu. Rev. Anal. Chem. 2008,1:20.1-20.26.
[14] Linda SJ, Charles TV. Sticking Probabilities in Adsorption from Liquid Solutions: Alkylthiols on Gold [J]. Physical Review Lstters, 2000, 84(22):5164-5167.
[15] Stefan A. Maier, Plasmonics: Fundamentals and Applications [M]. New York: Springer Science+Business Media LLC, 2007,159-162.