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We present the fabrication and characterization of Au-polyaniline (Au-PANI) composite film using electrochemical synthesis.1 The PANI film is prepared by the chronopotentiometery technique on a platinum substrate. The as deposited PANI film was modified with Au particles using cyclic voltammetery. X-ray diffraction (XRD), Fourier transform infrared (FTIR), Raman spectroscopy and Scanning electron microscopy (SEM) techniques were used to establish the structural-morphological properties of the Au–PANI composite. XRD spectra revealed (100) and (200) planes in the composite.2 FTIR spectra displayed the main vibrational bands; including the characteristic peaks.3-4 SEM image of PANI shows rough and porous morphology, whereas Au-PANI composite exhibit mesh type structure with uniform dispersion of the Au-particles. It is observed that the Au-PANI composite showed enhanced Raman characteristics (due to SERS effect of Au particles) in comparison to the pure PANI film. The analysis revealed that the Au-PANI composite can be used for highly sensitive and selective chemical and biological sensing applications.
(1) Ali, Y., Kumar, V., Sonkawade, R. G., Dhaliwal, A. S., Vacuum, 2013, 90, 59.
(2) Xu, Q., Leng, J., Li, H. B., Lu, G. J., Wang, Y., Hu, X. Y., React. Funct. Polym. 2010, 70, 663.
(3) Anand, P.B., Hasna, K., Anilkumar, K. M., Jayalekshmia, S., Polym. Int. 2012, 61, 1733.
(4) Kinyanjui, J. M., Hanks, J., Hatchett, D. W., Smith, A., Josowicz, M., J. of the Elec.l Soc. 2004, 151, D113