The invention discloses a gold
nanoparticle monofilm preparation method and a device thereof. The gold
nanoparticle monofilm preparation method comprises the steps of preparation of gold
sol, formation, transfer and optimization of monofilm, and so on. A desired gold
nanoparticle monofilm can be prepared by controlling monodispersity of the gold
sol and
solvent volatilization, and designing transfer of an interface monofilm. A special
chimney device is designed in the
solvent volatilization step, and comprises an upper part and a lower part communicated with each other, wherein the lower part is a columnar container chamber; the upper part is a tire-shaped
exhaust pipe with an air hole on the top, and can effectively control volatilization of the gold nanosol. The method provided by the invention can prepare a large-area gold nanoparticle monofilm
assembly structure at normal temperature and under normal pressure without adding any other extra agents; the monofilm is excellent in uniformity and high in SERS (surface enhanced
raman scattering) activity, and can serve as an ideal SERS substrate and membrane
electrode. The preparation method has the advantages of easy process, mild conditions, and no need for particular large-scale apparatus and equipment, and can be conducted in a laboratory.