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Technological and Material Related Challenges for Large Area, High Aspect-Ratio, Near Teradot/Inch(2) Areal Density and Three-Dimensional Structuring of Polyaniline

Piotr Jedrasik (Institutionen för mikroteknologi och nanovetenskap, Nanotekniklaboratoriet) ; A. Vlad ; Ulf Södervall (Institutionen för mikroteknologi och nanovetenskap, Nanotekniklaboratoriet)
Journal of Nanoscience and Nanotechnology (1533-4880). Vol. 11 (2011), 10, p. 8924-8935.
[Artikel, refereegranskad vetenskaplig]

In this manuscript we report on a newly developed technology for the nanoscale processing of the conducting polyaniline (PANI) with an unprecedented areal patterning order and density control exceeding 0.25 teradot/inch(2). High resolution electron beam lithography was used to generate ordered 2D and 3D templates. A novel type of resist and dose-modulated 3D-electron beam lithography (RDM-3D-EBL), extensively exploiting the intrinsic properties of resist-electron beam interaction is detailed. Surface initiated and template confined aniline polymerization, through catalytic activity of metallic platinum, was then exploited to provide a genuine method for controlled nanoscale processing of polyaniline, a prototypical conjugated polymer that definitively settled the concept of synthetic metals. Using nanoscale polymerization reactors, ultimate resolution patterning and processing control of single polyaniline nanostructures was feasible. Aspects of the nanoscale polyaniline growth mechanism are discussed and the highly controllable, sub-picogram scale fabrication is emphasized. Near teradot/inch(2) pattern transfer technology, complex 3D structuring and physico-chemical functionalization of polyaniline can be subsequently harnessed to build a large variety of architectures with potential for emerging optoelectronic technologies. The method is scalable, can be applied on virtually any type of flexible or rigid substrates and provides a generic approach for nanopatterning surfaces with functional polymers. Technological and material related fabrication challenges are detailed and discussed.

Nyckelord: Polyaniline, Surface Confined Polymerization, Near Teradot/Sqinch, Key-Lock Self-Assembly, 3D e-Beam Lithography, electron-beam lithography, conducting polymers, polymerization, fabrication, nanofibers, deposition, aniline, growth, nanoparticles, platinum

NANOMOL project-Communaute Francaise de Belgique; NANOTIC programme-Wallonia Region; MC2ACCESS - programme[026029] This work was supported by the NANOMOL project-Communaute Francaise de Belgique, the NANOTIC programme-Wallonia Region, and MC2ACCESS - programme, Contract No. 026029, as part of "Access to Research Infrastructures", FP6.

Denna post skapades 2012-02-02.
CPL Pubid: 154734


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