title: Fabrication and placement of a ring structure of nanoparticles by a laser-induced micronanobubble on a gold surface.
abstract: We have developed a new fabrication method for a ring structure of assembled nanoparticles on a gold surface by the use of continuous Nd:YAG laser light. A micronanobubble on a gold surface, created by laser local heating, acts as a template for the formation of the ring structure. Both Marangoni convection flow and capillary flow around the micronanobubble are responsible for the driving force to assemble nanoparticles such as CdSe Q-dots into the ring structure from the solution. Because a single micronanobubble was generated by the Nd:YAG laser focusing point, the precise positioning of the ring structure was feasible directly on the gold surface, which makes it possible to fabricate various patterns of rings such as arrays and letters and even a double-ring structure without any photomasks or any templates.
authors.affiliation: Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, Tokyo, Japan.
authors.forename: Sho
authors.initials: S
authors.lastname: Fujii
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Kanaizuka
authors.forename: Shoichi
authors.initials: S
authors.lastname: Toyabe
authors.forename: Katsuaki
authors.initials: K
authors.lastname: Kobayashi
authors.forename: Eiro
authors.initials: E
authors.lastname: Muneyuki
authors.forename: Masa-aki
authors.initials: MA
authors.lastname: Haga
mesh_terms: D006046:Gold / Q000737:chemistry*; D007834:Lasers; D055616:Microtechnology / Q000379:methods*; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D013499:Surface Properties
chemical_list: D006046:Gold