Manipulation of surface properties: the use of nanomembrane as a nanometre-thick decal

Watanabe, Hisayuki; Fujimoto, Aya; Takahara, Atsushi

doi:10.1039/c0sm01105c

Cited by 20 publications

(34 citation statements)

References 44 publications

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“…This result suggests that the strong adhesion was not dependent on the chemical structure of the film. Watanabe et al reported similar results where the flexural feature of a free‐standing film provided a large contact area, thus inducing strong adhesion of the film to the substrate. In this study, the prepared films had a free‐standing structure with a thickness in the range of 16–75 nm and an aspect ratio of over 10 6 .…”

Section: Resultsmentioning

confidence: 77%

Facile Synthesis of Free‐Standing Polymer Brush Films Based on a Colorless Polydopamine Thin Layer

Kohri

Shinoda

Kohma

et al. 2013

Macromol. Rapid Commun.

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A free-standing polymer brush film with tailored thicknesses based on a colorless polydopamine (PDA) thin layer is prepared and characterized. The surface-initiated atom transfer radical polymerization (ATRP) of 2-hydroxyethyl methacrylate (HEMA) is performed on a PDA layer with thickness of ca. 6 nm, which generated an optically transparent and colorless free-standing PHEMA brush film (1.5 cm × 1.5 cm). Because the cross-linked PDA layer is used as the base for the polymer brushes, the reported method does not require cross-linking the polymer brushes. The free-standing film thicknesses of ≈16-75 nm are controlled by simply changing the ATRP reaction time. The results show that the free-standing PHEMA brush film transferred onto a plate exhibits a relatively smooth surface and is stable in any solvent.

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Section: Resultsmentioning

confidence: 77%

Facile Synthesis of Free‐Standing Polymer Brush Films Based on a Colorless Polydopamine Thin Layer

Kohri

Shinoda

Kohma

et al. 2013

Macromol. Rapid Commun.

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“…27,28 Experimental details of the bulging experiment and SIEBIMM experiment are written in our previous works. 29…”

Section: Methodsmentioning

confidence: 95%

“…Ultimate tensile strength ( σ ) and the ultimate elongation ( ɛ ) were determined by bulge tests . Experimental details of the bulging experiment and SIEBIMM experiment are written in our previous works …”

Section: Methodsmentioning

confidence: 99%

Characterization of catechol‐containing natural thermosetting polymer “urushiol” thin film

Watanabe

Fujimoto

Takahara

2013

J. Polym. Sci. Part A: Polym. Chem.

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Urushi (oriental lacquer) is made from the sap of Rhus vernicifera and consists mainly of the catechol derivative urushiol. Thermal curing of urushiol, unlike other catechol derivatives, is possible because of the unsaturated double bonds in the long hydrocarbon side chain. We described here a simple, efficient method to produce a thermally cross‐linked urushi thin film using iron(II) acetate as the additive. The cured thin films showed robust, flexible feature as confirmed by strain‐induced elastic buckling instability for mechanical measurements (SIEBIMM) and bulging experiments. In contrast, a thin film of poly(dopamine) that is a typical catechol derivative without long hydrocarbon side chain showed brittleness. The long hydrocarbon side chain of urushiol plays an important role for both thermal processability and superior mechanical properties of the material. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 3688–3692

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“…σ UT,Au = 463.5 MPa) . This is because the ABS film ( E = 2.2 GPa at 25 °C) and PI substrate ( E = 2.5 GPa at 25 °C) in the glassy state induce significant stresses on the top surface of the PI/Au/PI layer; note that the FEM simulation does not show crack formation in materials even though the values of σ VM exceed the critical levels. The valley shape (assigned by α) with minimum values (σ VM and ε VM = 4.3 MPa and 0.19%, respectively) appears in the middle plane of the ABS film, which is the typical behavior of solid materials upon bending.…”

Section: Resultsmentioning

confidence: 89%

Automatic Transformation of Membrane‐Type Electronic Devices into Complex 3D Structures via Extrusion Shear Printing and Thermal Relaxation of Acrylonitrile–Butadiene–Styrene Frameworks

Jang

Yoo

Kang

et al. 2019

Adv Funct Materials

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This work demonstrates a means of automatic transformation from planar electronic devices to desirable 3D forms. The method uses a spatially designed thermoplastic framework created via extrusion shear printing of acrylonitrile-butadiene-styrene (ABS) on a stress-free ABS film, which can be laminated to a membrane-type electronic device layer. Thermal annealing above the glass transition temperature allows stress relaxation in the printed polymer chains, resulting in an overall shape transformation of the framework. In addition, the significant reduction in the Young's modulus and the ability of the polymer chains to reflow in the rubbery state release the stress concentration in the electronic device layer, which can be positioned outside the neutral mechanical plane. Electrical analyses and mechanical simulations of a membrane-type Au electrode and indium gallium zinc oxide transistor arrays before and after transformation confirm the versatility of this method for developing 3D electronic devices based on planar forms.

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Manipulation of surface properties: the use of nanomembrane as a nanometre-thick decal

Cited by 20 publications

References 44 publications

Facile Synthesis of Free‐Standing Polymer Brush Films Based on a Colorless Polydopamine Thin Layer

Facile Synthesis of Free‐Standing Polymer Brush Films Based on a Colorless Polydopamine Thin Layer

Characterization of catechol‐containing natural thermosetting polymer “urushiol” thin film

Automatic Transformation of Membrane‐Type Electronic Devices into Complex 3D Structures via Extrusion Shear Printing and Thermal Relaxation of Acrylonitrile–Butadiene–Styrene Frameworks

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