本文报导了用化学方法制备SERS活性的银膜。研究了异菸酸在不同pH值时吸附在化学沉积银膜表面上的SERS谱,我们发现异菸酸吸附在银膜表面上存在较强的SERS效应并且SERS谱随着溶液pH值的变化而变化。实验结果表明异菸酸在化学沉积银膜表面上的吸附方式随着溶液pH值的改变而改变。在较低pH值时,异菸酸通过环平面平躺吸附在银膜表面上,在较高pH值时,异菸酸是以异菸酸根离子的-COO~-端竖式吸附在银膜表面上。 This paper reports the preparation of SERS-active silver films by chemical methods. We studied the SERS spectra of isonicotinic acid adsorbed on the surface of electroless silver films at different pH values. We found that the SERS effect of isonicotinic acid adsorption on the silver film surface is strong and that the SERS spectrum changes with the pH value of the solution Variety. The experimental results show that the adsorption of isonicotinic acid on the surface of electroless silver films changes with the pH value of the solution. At lower pH, isonicotinic acid is adsorbed on the surface of the silver film by ring-plane lying. At higher pH, isonicotinic acid is adsorbed on the silver film by the -COO ~ - end of isonicotinate. On the surface.