Open AccessLaser fabrication of Au nanorod aggregates microstructures assisted by two-photon polymerization
Author(s) -
Keijiro Masui,
Satoru Shoji,
Kenji Asaba,
Thomas Rodgers,
Feng Jin,
XuanMing Duan,
Satoshi Kawata
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.022786
Subject(s) - nanorod , materials science , femtosecond , laser , polymerization , fabrication , nanolithography , nanotechnology , plasmon , microstructure , optics , optoelectronics , polymer , composite material , medicine , physics , alternative medicine , pathology
We demonstrate fabrication of Au nanorod aggregates microstructures by means of a femtosecond near-infrared laser. The laser light was tightly focused into colloidal Au nanorods dispersed in photopolymerizable metyl-methacrylate (MMA) compound to induce two-photon polymerization (TPP). TPP of MMA glued the nanorods together to form solid microstrucures of aggregates. The laser light excited a local surface plasmon, resulting in confinement of TPP in the vicinity of nanorods. Concurrenly occurring optical accumulation of nanorods created a unique mechanism for the formation of nanorod aggregates into desired microstructures. This technique would be a clue for a novel micro/nanofabrication method for plasmonic materials and devices.