Gold nanorod array and one kind of preparation and application

The present invention discloses a process for preparing a gold nanorod array, the method comprising: preparing cetyl trimethyl ammonium bromide (CTAB) modified gold nanorod aqueous solution, and adjust the gold nano-rods, respectively a final concentration of CTAB is 0.2-0.6nmol / L, 0.5-2mmol / L, and the mercapto compound is added with stirring to obtain a mixed solution, to a final concentration of sulfhydryl compound is 0.01-0.2mmol / L, the mixed solution was concentrated dropped hydrophilic on a planar substrate after air drying to obtain a gold nanorod arrays. The method of preparing the gold nanorod array is simple, mild conditions, gold nanorods prepared regular array structure, and is visible millimeter, a surface having evenly distributed SERS "hot spots", facilitates its use as SERS enhanced substrate. The present invention also provides a gold-rod array and its application.