Patent ID: 9658163
Date: 2017-05-23
CPC Classifications: B82Y,G01N

Claim:
1. A metal substrate used for surface enhanced Raman scattered light measurement, comprising an agglomerated region of metal nano-particles having SERS activity selected from the group consisting of Au and Ag on the metal substrate selected from the group consisting of Cu or Cu alloy, wherein the Cu or Cu alloy substrate has a lower or base electrode potential in a liquid than that of Au or Ag nano-particles having a particle diameter of 100 nm or less, wherein the Au or Ag nano-particles can be electro-chemically deposited directly on the Cu or Cu alloy substrate to form Au or Ag nano-particle agglomerates on the Cu or Cu alloy substrate from the liquid dispersed with 100 to 5000 ppm of the Au or Ag nano-particles by means of the electrode potential difference between the electrode potential of the Cu or Cu alloy and that of the Au or Ag particles in the liquid and the agglomeration can be stopped in a desired agglomerated state by blowing off the liquid on the Cu or Cu alloy substrate, wherein the Au or Ag nano-particle agglomerates are crystalline.