Millisecond Ordering of Block Copolymer Films via Photothermal Gradients

ACS Nano
Pawel W Majewski, Kevin G Yager

Abstract

For the promise of self-assembly to be realized, processing techniques must be developed that simultaneously enable control of the nanoscale morphology, rapid assembly, and, ideally, the ability to pattern the nanostructure. Here, we demonstrate how photothermal gradients can be used to control the ordering of block copolymer thin films. Highly localized laser heating leads to intense thermal gradients, which induce a thermophoretic force on morphological defects. This increases the ordering kinetics by at least 3 orders of magnitude compared to conventional oven annealing. By simultaneously exploiting the thermal gradients to induce shear fields, we demonstrate uniaxial alignment of a block copolymer film in less than a second. Finally, we provide examples of how control of the incident light field can be used to generate prescribed configurations of block copolymer nanoscale patterns.

References

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Citations

Oct 10, 2015·Soft Matter·Pawel W Majewski, Kevin G Yager
Mar 10, 2016·ACS Applied Materials & Interfaces·Gabriele SeguiniMichele Perego
Sep 10, 2015·ACS Applied Materials & Interfaces·Arvind ModiAlamgir Karim
Jul 15, 2015·Nano Letters·Pawel W Majewski, Kevin G Yager
Jun 24, 2015·Nature Communications·Pawel W MajewskiKevin G Yager
Mar 7, 2017·ACS Applied Materials & Interfaces·Federico Ferrarese LupiMichele Perego
Apr 11, 2017·Soft Matter·Charles T BlackKevin G Yager
Dec 12, 2017·Nanoscale·Youngwoo ChooKevin G Yager
Jun 20, 2019·Science Advances·Ye Chan KimSo Youn Kim
Nov 18, 2018·IUCrJ·Jiliang Liu, Kevin G Yager
Jul 28, 2020·Advanced Materials·Kangho ParkHee-Tae Jung
Aug 19, 2016·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Pawel W Majewski, Kevin G Yager
Jan 29, 2021·Soft Matter·Sabin AdhikariSumesh P Thampi
Nov 19, 2020·Advanced Materials·Kun-Hua TuCaroline A Ross
Jul 18, 2021·Macromolecular Rapid Communications·Mark RobertsonZhe Qiang
Jan 7, 2020·ACS Applied Materials & Interfaces·Saejin OhSo-Jung Park
Dec 2, 2017·ACS Nano·Gregory S Doerk, Kevin G Yager
Nov 29, 2017·ACS Applied Materials & Interfaces·Antoine LegrainMarc Zelsmann
Mar 12, 2020·ACS Nano·Arkadiusz A LeniartPawel W Majewski
Jan 23, 2020·ACS Applied Materials & Interfaces·Katia SparnacciPeter Muller-Buschbaum
Jul 28, 2020·ACS Macro Letters·Alejandro A KrauskopfSanat K Kumar
May 5, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Chih-Yin Chen, Fernando A Escobedo
Jan 1, 2021·Macromolecules·Arkadiusz A LeniartPawel W Majewski

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