Multilayer block copolymer meshes by orthogonal self-assembly

Tavakkoli K. G., Amir; Nicaise, Samuel M.; Gadelrab, Karim R.; Alexander-Katz, Alfredo; Ross, Caroline A.; Berggren, Karl K.

doi:10.1038/ncomms10518

Title: Multilayer block copolymer meshes by orthogonal self-assembly

Journal Article · Fri Jan 22 00:00:00 EST 2016 · Nature Communications

DOI:https://doi.org/10.1038/ncomms10518· OSTI ID:1238285

Tavakkoli K. G., Amir ^[1]; Nicaise, Samuel M. ^[1]; Gadelrab, Karim R. ^[1]; Alexander-Katz, Alfredo ^[1]; Ross, Caroline A. ^[1]; Berggren, Karl K. ^[1]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Continued scaling-down of lithographic-pattern feature sizes has brought templated self-assembly of block copolymers (BCPs) into the forefront of nanofabrication research. Technologies now exist that facilitate significant control over otherwise unorganized assembly of BCP microdomains to form both long-range and locally complex monolayer patterns. In contrast, the extension of this control into multilayers or 3D structures of BCP microdomains remains limited, despite the possible technological applications in next-generation devices. Here, we develop and analyse an orthogonal self-assembly method in which multiple layers of distinct-molecular-weight BCPs naturally produce nanomesh structures of cylindrical microdomains without requiring layer-by-layer alignment or high-resolution lithographic templating. The mechanisms for orthogonal self-assembly are investigated with both experiment and simulation, and we determine that the control over height and chemical preference of templates are critical process parameters. The method is employed to produce nanomeshes with the shapes of circles and Y-intersections, and is extended to produce three layers of orthogonally oriented cylinders.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Science Foundation (NSF)

Grant/Contract Number:: NSF DMR1419807; CMMI-1246740

OSTI ID:: 1238285

Journal Information:: Nature Communications, Vol. 7, Issue 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: ENGLISH

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Cited by: 78 works

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