Abstract
For low-cost and facile fabrication of innovative nanoscale devices with outstanding functionality and performance, it is critical to develop more practical patterning solutions that are applicable to a wide range of materials and feature sizes while minimizing detrimental effects by processing conditions. In this study, we report that area-selective sub-10 nm pattern formation can be realized by temperature-controlled spin-casting of block copolymers (BCPs) combined with submicron-scale-patterned chemical surfaces. Compared to conventional room-temperature spin-casting, the low temperature (e.g.,-5 °C) casting of the BCP solution on the patterned self-assembled monolayer achieved substantially improved area selectivity and uniformity, which can be explained by optimized solvent evaporation kinetics during the last stage of film formation. Moreover, the application of cold spin-casting can also provide high-yield in situ patterning of light-emitting CdSe/ZnS quantum dot thin films, indicating that this temperature-optimized spin-casting strategy would be highly effective for tailored patterning of diverse organic and hybrid materials in solution phase.
Original language | English |
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Pages (from-to) | 8224-8233 |
Number of pages | 10 |
Journal | ACS nano |
Volume | 12 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2018 Aug 28 |
Bibliographical note
Funding Information:This research was supported by Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (NRF-2016M3D1A1900035). This research was supported by the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning (NRF-2013M3C1A3063046). This work was also supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2017R1A2B2009948). The authors also acknowledge Pohang Accelerator Laboratory for grazing-incidence small-angle X-ray scattering measurements.
Publisher Copyright:
© 2018 American Chemical Society.
Keywords
- block copolymers
- cold spin-casting
- quantum dots
- self-assembled monolayer
- spontaneous registration
ASJC Scopus subject areas
- General Materials Science
- General Engineering
- General Physics and Astronomy