Atomic-scale thermal behavior of nanoimprinted 0.3-nm-high step patterns on PMMA polymer sheets

Tan, Goon; Nozawa, Yasuhisa; Funabasama, Tomoyuki; Koyama, Koji; Mita, Mamoru; Kaneko, Satoru; Komura, Motonori; Matsuda, Akifumi; Yoshimoto, Mamoru

doi:10.1038/pj.2015.99

Cited by 6 publications

(6 citation statements)

References 17 publications

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“…137 °C within 20 s. The temperature settings were quite similar to the peak temperatures of the heating plates used previously by Tan and co-workers. 11 They used a fully automated nanoimprinting equipment, and the temperatures of the lower and upper plates were raised to 140 °C at 13 °C/min and 80 °C at 4 °C/min, respectively, and then the plates were cooled to 30 °C at the rates of ca. 10 and 6 °C/min, respectively, prior to the removal of the sample.…”

Section: Resultsmentioning

confidence: 99%

“…Tan, Yoshimoto, and co-workers reported that an atomically stepped structure of a sapphire substrate (α-Al 2 O 3 single crystal) can be imprinted on a PMMA plate by thermally pressing the sapphire substrate onto the PMMA plate. , The atomically stepped structure of a sapphire substrate was formed by annealing a sapphire single crystal at a temperature between 1000 and 1400 °C in air . The imprinted PMMA surface exhibited regularly arranged steps with a step height of ca.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of a Polymer Molecularly Flat Substrate by Thermal Nanoimprinting and AFM Observation of Polymer Chains Deposited on It

Umetsu

Kumaki

2019

Macromolecules

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The surface of polymers is believed to have high mobility, and their glass transition temperature decreases significantly from the bulk value. In this study, we prepared a molecularly flat poly(methyl methacrylate) (PMMA) substrate by thermal nanoimprinting a PMMA plate with an atomically stepped sapphire substrate. The imprinted PMMA surface with a step height of ca. 0.2 nm was stable for months in air at room temperature and was retained even after immersion in water for 10 h. PMMA chains and an isotactic PMMA crystalline monolayer deposited on the imprinted PMMA substrate by the Langmuir–Blodgett technique were observed by atomic force microscopy at the molecular level, and the molecular structures were stable for months in air at room temperature. These significant stabilities of the surface of the imprinted PMMA substrate and the monolayers deposited are unexpected and differ from the results expected based on our present understanding of the polymer surfaces. The results indicate that the properties of the thermally pressed polymer surface may be different from those of the previously studied solvent-cast polymer surfaces.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of a Polymer Molecularly Flat Substrate by Thermal Nanoimprinting and AFM Observation of Polymer Chains Deposited on It

Umetsu

Kumaki

2019

Macromolecules

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“…Atomically smooth sapphire substrates can be also applied as atomic-scale observation stages for biochemical materials [26]. In previous research, we demonstrated the nanoscale surface modification of soda lime silicate glasses and poly(methyl methacrylate) sheets by the thermal nanoimprinting process using sapphire substrates as imprinting molds [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Atomic step-and-terrace surface of polyimide sheet for advanced polymer substrate engineering

et al. 2016

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Typical thermostable and flexible polyimide polymers exhibit many excellent properties such as strong mechanical and chemical resistance. However, in contrast to single-crystal substrates like silicon or sapphire, polymers mostly display disordered and rough surfaces, which may result in instability and degradation of the interfaces between thin films and polymer substrates. As a step toward the development of next-generation polymer substrates, we here report single-atom-layer imprinting onto the polyimide sheets, resulting in an ultrasmooth 0.3 nm high atomic step-and-terrace surface on the polyimides. The ultrasmooth polymer substrates are expected to be applied to the fabrication of nanostructures such as superlattices, nanowires, or quantum dots in nanoscale-controlled electronic devices. We fabricate smooth and atomically stepped indium tin oxide transparent conducting oxide thin films on the imprinted polyimide sheets for future use in organic-based optoelectronic devices processed with nanoscale precision. Furthermore, toward 2D polymer substrate nanoengineering, we demonstrate nanoscale letter writing on the atomic step-and-terrace polyimide surface via atomic force microscopy probe scratching.

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“…The temperature of 80 °C employed in this printing was lower by 25 °C than T g of PMMA (105 °C), and suppressed the deformation of the atomically stepped morphology of the sheet surface during NCP. 29) It is noted that the straight atomic steps still remain on the PMMA surface after NCP. The Au nanoarray pattern in Fig.…”

mentioning

confidence: 98%

Nanocontact printing of Au nanoarray onto atomically stepped ultrasmooth polymer sheets

Shimada

Tan

Nozawa

et al. 2016

Jpn. J. Appl. Phys.

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Large area Au nanoparticle arrays of dots or meshes were produced onto 0.3-nm-high stepped ultrasmooth poly(methyl methacrylate) (PMMA) sheets by applying a nanocontact-printing technique using a Au-film-coated pillar or mesh molds. The ultrasmooth PMMA sheets were fabricated by thermal nanoimprinting using the atomically stepped sapphire templates. The partial Au ultrathin layer near the protruding area of the mold was adhered onto the PMMA sheet under imprinting conditions (loading of 0.4–2 MPa at 80 °C for 300 s).

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Atomic-scale thermal behavior of nanoimprinted 0.3-nm-high step patterns on PMMA polymer sheets

Cited by 6 publications

References 17 publications

Fabrication of a Polymer Molecularly Flat Substrate by Thermal Nanoimprinting and AFM Observation of Polymer Chains Deposited on It

Fabrication of a Polymer Molecularly Flat Substrate by Thermal Nanoimprinting and AFM Observation of Polymer Chains Deposited on It

Atomic step-and-terrace surface of polyimide sheet for advanced polymer substrate engineering

Nanocontact printing of Au nanoarray onto atomically stepped ultrasmooth polymer sheets

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