Updated in 12/20/2012 4:22:17 PM      Viewed: 112 times      (Journal Article)
Langmuir : the ACS journal of surfaces and colloids 28 (49): 16782-7 (2012)

Directed self-assembly of densely packed gold nanoparticles.

Mohamed Asbahi , Kevin T P Lim , Fuke Wang , Huigao Duan , Naganivetha Thiyagarajah , Vivian Ng , Joel K W Yang
ABSTRACT
Directing the self-assembly of sub-10-nm nanoparticles has been challenging because of the simultaneous requirements to achieve a densely packed monolayer and rearrange nanoparticles to assemble within a template. We met both requirements by separating the processes into two steps by first forming a monolayer of gold nanoparticles on a suitable liquid subphase of anisole and then transferring it edgewise onto a silicon substrate with a prepatterned template comprising nanoposts and nanogratings. Doing so resulted in nanoparticles that assembled in commensuration with the template design while exhibiting appreciable template-induced strain. These dense arrays of nanostructures could either be directly applied or used as lithographic masks in applications for light collection, chemical sensing, and data storage.
DOI: 10.1021/la303287z      ISSN: 0743-7463