High‐Performance n‐Type Electrical Memory and Morphology‐Induced Memory‐Mode Tuning of a Well‐Defined Brush Polymer Bearing Perylene Diimide Moieties

Kim, Young Yong; Ree, Brian J.; Kido, Makoto; Ko, Yong Gi; Ishige, Ryohei; Hirai, Tomoyasu; Wi, Dongwoo; Kim, Jehan; Kim, Won Jong; Takahara, Atsushi; Ree, Moonhor

doi:10.1002/aelm.201500197

Cited by 33 publications

(33 citation statements)

References 35 publications

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“…The fiber axis was fixed along the meridional direction. All diffraction patterns were clearly assignable by assuming a monoclinic crystal ( a = 2.41 nm, b = 0.74 nm, c = 5.98 nm, and β = 108.13°), as previously reported . In the small angle region, the diffraction patterns are assigned to (100), (002), and (003) reflections of the monoclinic crystal.…”

Section: Resultssupporting

confidence: 74%

“…The chemical structures of the polymer with pendant PDI side chains, designated PAc12PDI, are shown in Figure . An acrylate containing PDI monomer, Ac12PDI, was synthesized following a previously reported method . The monomer was polymerized by the nitroxide‐mediated living radical polymerization (NMP) method using 2,2,5‐trimethyl‐3‐(1‐phenylethoxy)−4‐pheneyl‐3‐azahexane as an initiator in o ‐dichlorobenzene.…”

Section: Methodsmentioning

confidence: 99%

“…Depending on the length of the alkyl chains, various ordered structure ranging from liquid–crystalline to crystalline have been observed. We recently reported that a polymer containing a dodecyl group as long liner spacer and bishexylheptyl groups as branched alkyl tail group, designated PAc12PDI, organized into various crystal lattices in the thin film state depending on preparation conditions, which lead to specific n‐type memory properties . To further improve the functional performance of this type of PDI‐containing material, it is necessary to better control the orientation of the side chains.…”

Section: Introductionmentioning

confidence: 99%

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Effect of molecular weight on microcrystalline structure formation in polymer with perylenediimide side chain

Kido

Nojima

Ishige

et al. 2016

J. Polym. Sci. Part B: Polym. Phys.

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The effect of molecular weight on the molecular aggregation structure of polymers bearing a pendant perylenediimide (PDI) side chain, designated PAc12PDI, was investigated using synchrotron radiation X‐ray diffraction measurements. It was found that depending on molecular weight, either the main chain axis or the side chain axis behaves as the longitudinal axis in fiber samples and was aligned parallel to the fiber axis. A similar phenomenon is present in thin film samples, but was complicated by the additional influence of the interfacial free energy of the side chain group. Even in the case of the polymer with lower molecular weight, the face plane of PDI was found to show both parallel and perpendicular orientations to the substrate (i.e., flat‐on and edge‐on orientations). On the other hand, if the length of the main chain is sufficiently long with respect to the length of the side chain, the face plane of PDI was oriented perpendicular to the substrate, leading to an edge‐on orientation in the thin film. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016, 54, 2275–2283

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Section: Resultssupporting

confidence: 74%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of molecular weight on microcrystalline structure formation in polymer with perylenediimide side chain

Kido

Nojima

Ishige

et al. 2016

J. Polym. Sci. Part B: Polym. Phys.

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“…Solution X-ray scattering measurements were carried out at the 4C beamline [30][31][32] of the Pohang Accelerator Laboratory at Pohang University of Science and Technology. Each micellar solution was filtered through a disposable syringe equipped with a polytetrafluoroethylene filter with a 0.2 μm pore size before measurements.…”

Section: Synchrotron X-ray Scattering Measurementsmentioning

confidence: 99%

Well-defined and stable nanomicelles self-assembled from brush cyclic and tadpole copolymer amphiphiles: a versatile smart carrier platform

et al. 2017

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This study reports the first well-defined and stable nanomicelles (20 − 30 nm in diameter) self-assembled from amphiphilic brush (comb-like) cyclic and tadpole-shaped copolymers composed of hydrophobic n-decyl and hydrophilic 2-(2-methoxyethoxy)ethoxy) ethyl bristle blocks based on a poly(glycidyl ether) backbone. The micelle formation behaviour and structural details were investigated by synchrotron X-ray scattering analysis in a rigorous and complementary manner. The amphiphilic brush cyclic topology facilitates more compact and stable aggregation behaviour in the micelle core and a more densely packed corona, which prevents intermicellar aggregation. The presence of a hydrophobic component with brush cyclic topology inside the core is identified as the primary micelle stabilizing factor, enabling stable core aggregation and sharper core-corona interface formation. The presence of a hydrophilic brush cyclic component in the corona is determined as the secondary micelle stabilizing factor, helping nullify the corona penetration by polymer chains from other micelles and ultimately prevent the intermicellar aggregation-mediated collapse of the micellar structure. Overall, the brush cyclic topology was confirmed to be beneficial for forming highly stable nanomicelles with an extremely narrow (pseudo-monodisperse) size distribution compared with conventional linear topology and tadpole topologies. All the results of this study provide a unique opportunity for designing advanced functional high-performance amphiphilic materials for nanomicelles that are unattainable by other conventional methods and broadening their applications in various fields, including drug delivery, biomedical imaging, foods, cosmetics, smart coatings, photonics and molecular electronics.

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“…In contrast, n-type memory polymers have rarely been reported. 20,30 Therefore, research on functional polymers with highperformance electrical memory characteristics remains in the early developmental stages.…”

Section: Introductionmentioning

confidence: 99%

High-performance triazole-containing brush polymers via azide–alkyne click chemistry: a new functional polymer platform for electrical memory devices

Song

Lee

et al. 2015

NPG Asia Mater

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Two series of well-defined brush polymers bearing a triazole moiety on each bristle were prepared from the click chemistry reactions of a poly(glycidyl azide) (PG) and a poly(4-azidomethylstyrene) (PS) with alkyne derivatives. The thin-film morphologies and properties, especially electrical memory performances, of these triazole-containing brush polymers were investigated in detail. The brush polymers with a triazole ring substituted with an alkyl or alkylenylphenyl group in the bristle exhibited only dielectric characteristics. By contrast, the other brush polymers bearing a triazole ring substituted with phenyl or its derivatives with a longer π-conjugation length in the bristle demonstrated excellent unipolar permanent memory behaviors with low power consumption, high ON/OFF current ratios and high stability and reliability under ambient air conditions. Furthermore, their memory type could be tuned to p-or n-type by the incorporation of an electron-donating or -accepting group into the phenyl unit linked to the triazole moiety. Overall, this study presents the first demonstration of the azide-alkyne click chemistry synthesis of triazole moieties with substituent(s) that exhibit a resonance effect; this approach is a very powerful synthetic route to develop electrical memory polymers suitable for the low-cost mass production of high-performance, polarity-free programmable memory devices.

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High‐Performance n‐Type Electrical Memory and Morphology‐Induced Memory‐Mode Tuning of a Well‐Defined Brush Polymer Bearing Perylene Diimide Moieties

Cited by 33 publications

References 35 publications

Effect of molecular weight on microcrystalline structure formation in polymer with perylenediimide side chain

Effect of molecular weight on microcrystalline structure formation in polymer with perylenediimide side chain

Well-defined and stable nanomicelles self-assembled from brush cyclic and tadpole copolymer amphiphiles: a versatile smart carrier platform

High-performance triazole-containing brush polymers via azide–alkyne click chemistry: a new functional polymer platform for electrical memory devices

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