| abstract |
The present application relates to a method for preparing a gold-silver alloy nano-chain array structure based on an alternating electric field, in particular to the field of optical detection structure preparation. The present application provides a method for preparing gold-silver alloy nano-chain array structure based on AC electric field; due to the colloid of gold-silver alloy nanoparticles, the dielectrophoretic force received in the non-uniform AC electric field, the monodisperse gold-silver alloy nanoparticles are assembled into gold Silver alloy nano-chain arrays deposit preset probe molecules on the surface of the gold-silver alloy nano-chain array structure; and because the alloy nano-chain array structure has abundant nano-gap, under the excitation of the external light field, many dense ""hotspots", there are extremely strong local electromagnetic fields distributed at these "hot spots", when the probe molecules are adsorbed on the surface of the gold-silver alloy nanochain array structure, the incident light and the emitted light field of the Raman scattering process will be affected by the local domain surface plasmon mode resonance is enhanced. |