Patterned arrays of assembled nanoparticles prepared by interfacial assembly and femtosecond laser fabrication

Chengpeng Jiang, Daiki Oshima, Satoshi Iwata, Philip W.T. Pong, Takeshi Kato

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Creating shape-defined structures of inorganic nanoparticles in a maskless and template-free fashion would advance the engineering of nanoparticle-based devices and structures with desired configurations for various applications. In this work, a novel fabrication protocol combining bottom-up interfacial assembly and subtractive laser patterning was developed for creating patterned arrays of assembled nanoparticles. A solid film of magnetic nanoparticles (10 nm, monodisperse CoFe2O4) was assembled as a nanoparticle film (thickness less than 100 nm) on liquid interface under guiding field, and it was further transferred to Si substrate followed by selective material removal using femtosecond laser pulses, producing patterned arrays (typical size of 3 μm) of assembled nanoparticles. The size, shape, and arrangement of the patterned arrays were finely regulated by adjusting the laser pulse energy and laser scanning path. The magnetization behavior and magnetic anisotropy of the patterned arrays differ from those of the nanoparticle-assembled film, as reflected by the changes of coercivity and squareness along the out-of-plane direction. The presented fabrication protocol is compatible with microelectronic fabrication techniques and can be applied to various inorganic nanoparticles.

Original languageEnglish (US)
Article number1
JournalJournal of Nanoparticle Research
Issue number1
StatePublished - Jan 1 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • General Chemistry
  • Modeling and Simulation
  • General Materials Science
  • Condensed Matter Physics


  • Collective properties
  • Femtosecond laser fabrication
  • Interfacial assembly
  • Magnetic properties
  • Nanoparticle patterning


Dive into the research topics of 'Patterned arrays of assembled nanoparticles prepared by interfacial assembly and femtosecond laser fabrication'. Together they form a unique fingerprint.

Cite this