2015

Yumiko Ohtsuka, Takahiro Seki, Yukikazu Takeoka, Thermally Tunable Hydrogels Displaying Angle-Independent Structural Colors, Angewandte Chemie International Edition, 54(51), 15368-15373 (2015). (Hot Paper)

Emiko Kazuma, Mina Han, Jaehoon Jung, Junepyo Oh, Takahiro Seki, Yousoo Kim, Elucidation of Isomerization Pathways of a Single Azobenzene Derivative Using an STM, The Journal of Physical Chemistry Letters, 6(21), 4239-4243 (2015).

Daisuke Tanaka, Yuki Nagashima, Mitsuo Hara, Shusaku Nagano, Takahiro Seki, Alternation of Side-Chain Mesogen Orientation Caused by the Backbone Structure in Liquid-Crystalline Polymer Thin Films, Langmuir, 31(42), 11379-11383 (2015).

Karthik Krishnan, Hiroko Iwatsuki, Mitsuo Hara, Shusaku Nagano, Yuki Nagao, Influence of Molecular Weight on Molecular Ordering and Proton Transport in Organized Sulfonated Polyimide Thin Films, The Journal of Physical Chemistry C, 119(38), 21767-21774 (2015).

Takahiro Takeshima, Wan-yu Liao, Yuki Nagashima, Koichiro Beppu, Mitsuo Hara, Shusaku Nagano, Takahiro Seki, Photoresponsive Surface Wrinkle Morphologies in Liquid Crystalline Polymer Films, Macromolecules, 48(18), 6378-6384 (2015).

Masami Sano, Feng Shan, Mitsuo Hara, Shusaku Nagano, Yuya Shinohara, Yoshiyuki Amemiya, Takahiro Seki, Dynamic photoinduced realignment processes in photoresponsive block copolymer films: effects of the chain length and block copolymer architecture, Soft Matter, 11(29), 5918-5925 (2015).

Masami Sano, Tomoya Murase, Mitsuo Hara, Shusaku Nagano, Yuya Shinohara, Yoshiyuki Amemiya, Takahiro Seki, Photo-switching Behavior of Microphase Separated Structure in Liquid Crystalline Azobenzene Block Copolymers Possessing Different Poly(alkyl methacrylate) Blocks, Molecular Crystals and Liquid Crystals, 617(1), 5-13 (2015).

Takahiro Seki, Kei Fukuhara, Masami Sano, Mitsuo Hara, Shusaku Nagano, Photoalignment of Liquid Crystalline Polymer Films Containing Mesostructures and a Free Surface Command Layer, Molecular Crystals and Liquid Crystals, 614, 118-123 (2015).

Masami Sano, Mitsuo Hara, Shusaku Nagano, Yuya Shinohara, Yoshiyuki Amemiya, Takahiro Seki, New Aspects for the Hierarchical Cooperative Motions in Photoalignment Process of Liquid Crystalline Block Copolymer Films, Macromolecules, 48(7), 2217-2223 (2015).

Mina Han, Yukikazu Takeoka, Takahiro Seki, Facile morphological control of fluorescent nano/microstructures via self-assembly and phase separation of trigonal azobenzenes showing aggregation-induced emission enhancement in polymer matrices, Journal of Materials Chemistry C, 3, 4093-4098 (2015)

Daichi Yamaoka, Mitsuo Hara, Shusaku Nagano, Takahiro Seki, Photoalignable Radical Initiator for Anisotropic Polymerization in Liquid Crystalline Media, Macromolecules, 48(4), 908-914 (2015).

Yukikazu Takeoka, Fusion Materials for Biomimetic Structurally Colored Materials, Polymer Journal, 47(2), 106-113 (2015).

Midori Teshima, Takahiro Seki, Ryuji Kawano, Shoji Takeuchi, Shinya Yoshioka, Yukikazu Takeoka, Preparation of Structurally Colored, Monodisperse Spherical Assemblies Composed of Black and White Colloidal Particles using a Micro-Flow-Focusing Device, Journal of Materials Chemistry C, 3(4), 769-777 (2015).

  2014

Shinya Yoshioka, Yukikazu Takeoka,Production of Colourful Pigments Consisting of Amorphous Arrays of Silica Particles, ChemPhysChem, 15(11), 2209-2215 (2014).

Guanghui Cui, Masamichi Fujikawa, Shusaku Nagano, Keisuke Shimokita, Tsukasa Miyazaki, Shinichi Sakurai, Katsuhiro Yamamoto, Macroscopic Alignment of Cylinders via Directional Coalescence of Spheres along Annealing Solvent Permeation Directions in Block Copolymer Thick Films, Macromolecules, 47(17), 5989-5999 (2014).

Karthik Krishnan, Tomoaki Yamada, Hiroko Iwatsuki, Mitsuo Hara, Shusaku Nagano, Kazuya Otsubo, Osami Sakata, Akihiko Fujiwara, Hiroshi Kitagawa, Yuki Nagano, Influence of Confined Polymer Structure on Proton Transport Property in Sulfonated Polyimide Thin Films, Electrochemistry, 82(10), 865-869 (2014).

Mina Han, Sung-June Cho, Yasuo Norikane, Masaki Shimizu, Akinori Kimura, Tomokazu Tamagawa, Takahiro Seki, Multistimuli-responsive azobenzene nanofibers with aggregation-induced emission enhancement characteristics, Chemical Communications, 50(99), 15815-15818 (2014).

Kei Fukuhara, Mitsuo Hara, Shusaku Nagano, Takahiro Seki, Free Surface-Induced Planar Orientation in Liquid Crystalline Block Copolymer Films: On the Design of Additive Surface Active Polymer Layer, Molecular Crystals and Liquid Crystals, 601(1), 11-19 (2014).

Masami Sano, Shiyuko Nakamura, Mitsuo Hara, Shusaku Nagano, Yuya Shinohara, Yoshiyuki Amemiya, Takahiro Seki, Pathways toward Photoinduced Alignment Switching in Liquid Crystalline Block Copolymer Films, Macromolecules, 47(20), 7178-7186 (2014).

Takahiro Seki, New strategies and implications for the photoalignment of liquid crystalline polymers, Polymer Journal (invited review), 46(11), 751-768 (2014). (featured as cover picture)

Abu Bin Imran, Kenta Esaki, Hiroaki Gotoh, Takahiro Seki, Kohzo Ito, Yasuhiro Sakai, Yukikazu Takeoka, Extremely stretchable thermosensitive hydrogels by introducing slide-ring polyrotaxane cross-linkers and ionic groups into the polymer network, Nature Communications, 5, 5124(1-8) (2014).

Guanghui Cui, Masamichi Fujikawa, Shusaku Nagano, Masami Sano, Hiroshi Takase, Tsukasa Miyazaki, Shinichi Sakurai, Katsuhiro Yamamoto, Perpendicular oriented cylinders via directional coalescence of spheres embedded in block copolymer films induced by solvent annealing, Polymer, 55(6), 1601-1608 (2014). 

Karthik Krishnan, Hiroko Iwatsuki, Mitsuo Hara, Shusaku Nagano, Yuki Nagao, Proton conductivity enchancement in oriented, sulfonated polyimide thin films, Journal of Materials Chemistry A, 2(19), 6895-6903 (2014). 

Kei Fukuhara, Shusaku Nagano, Mitsuo Hara, Takahiro Seki, Free-surface molecular command systems for photoalignment of liquid crystalline materials, Nature Communications, 5, 3320(1-8) (2014). 

Ryoko Hirashima, Takahiro Seki, Kiyofumi Katagiri, Yuki Akuzawa, Tsukasa Torimoto, Yukikazu Takeoka, Light-induced saturation change in the angle-independent structural coloration of colloidal amorphous arrays, Journal of Materials Chemistry C, 2(2), 344-348 (2014).

Jin Wook Park, Shusaku Nagano, Seong-Jun Yoon, Tomoki Dohi, Jangwon Seo, Takahiro Seki, Soo Young Park, High Contrast Fluorescence Patterning in Cyanostilbene-Based Crystalline Thin Films: Crystallization-Induced Mass Flow Via a Photo-Triggered Phase Transition, Advanced Materials, 26(9), 1354-1359 (2014).

Takahiro Seki, Meso- and Microscopic Motions in Photoresponsive Liquid Crystalline Polymer Films, Macromolecular Rapid Communications, 35(3), 271-290 (2014). (invited review)

  2013

Takahiro Seki, Shusaku Nagano, Mitsuo Hara, Versatility of photoalignment techniques: From nematics to a wide range of functional materials, Polymer, 54(22), 6053-6072 (2013). (invited feature article)

Yukikazu Takeoka, Stimuli-responsive opals: colloidal crystals and colloidal amorphous arrays for use in functional structurally colored materials, Journal of Materials Chemistry C, 1(38), 6059-6074 (2013). (invited feature article)

Hafiz Ashraful Haque, Mitsuo Hara, Shusaku Nagano, Takahiro Seki, Photoinduced In-plane Motions of Azobenzene Mesogens Affected by the Flexibility of Underlying Amorphous Chains, Macromolecules, 46(20), 8275-8283 (2013).

Mitsuo Hara, Shusaku Nagano, Takahiro Seki, Spontaneous Formation of Vertically Aligned Lamellae in Thin Films of Block Copolymer-Silica Hybrid Material, Bulletin of the Chemical Society of Japan, 86(10), 1151-1157 (2013). (Selected Papers)

Yukikazu Takeoka, Shinya Yoshioka, Atsushi Takano, Shigeo Arai, Khanin Nueangnoraj, Hirotomo Nishihara, Midori Teshima, Yumiko Ohtsuka, Takahiro Seki, Production of Colored Pigments with Amorphous Arrays of Black and White Colloidal Particles, Angewandte Chemie International Edition, 52(28), 7261-7265 (2013). 

Guanghui Cui, Satoshi Ohya, Taito Matsutani, Shusaku Nagano, Tomoki Dohi, Shiyuko Nakamura, Shinichi Sakurai, Tsukasa Miyazaki, Katsuhiro Yamamoto, Perpendicular orientation of sub-10 nm channels in polystyrene-b-poly(4-hydroxyl styrene)/PEG oligomer blend thin films, Nanoscale, 5, 6713-6719 (2013). 

M. Akai-Kasaya, Y. Okuaki, S. Nagano, A. Saito, M. Aono, Y. Kuwahara, Isotropic charge transport in highly ordered regioregular poly(3-hexylthiophene) monolayer, Journal of Physics D: Applied Physics, 46(42), 425303(1-7) (2013). 

Yukikazu Takeoka, Shinya Yoshioka, Midori Teshima, Atsushi Takano, Mohammad Harun-Ur-Rashid, Takahiro Seki, Structurally Coloured Secondary Particles Composed of Black and White Colloidal Particles, Scientific Reports, 3, 2371(1-7) (2013).

Hafiz Ashraful Haque, Soutarou Kakehi, Mitsuo Hara, Shusaku Nagano, Takahiro Seki, High-Density Liquid-Crystalline Azobenzene Polymer Brush Attained by Surface-Initiated Ring-Opening Metathesis Polymerization, Langmuir, 29(25), 7571-7575 (2013).

Kei Fukuhara, Yasuyoshi Fujii, Yuki Nagashima, Mitsuo Hara, Shusaku Nagano, Takahiro Seki, Liquid-Crystalline Polymer and Block Copolymer Domain Alignment Controlled by Free-Surface Segregation, Angewandte Chemie International Edition, 52(23), 5988-5991 (2013).

Hafiz Ashraful Haque, Shusaku Nagano, Takahiro Seki, Effect of Flexible Chain Length on the Photoorientation Behavior of Surface-grafted Liquid Crystalline Azobenzene Block Copolymer Brush, Molecular Crystals and Liquid Crystals, 583, 10-20 (2013).

  2012

Wenhan Li, Shusaku Nagano, Koichiro Yonetake,Takahiro Seki, Photoinduced Dewetting in Thin Films of Liquid Crystalline Dendritic Azobenzene Derivatives, Molecular Crystals and Liquid Crystals, 563(1), 112-120 (2012).

264)

Yuki Hayata, Shusaku Nagano, Yukikazu, Takeoka, Takahiro Seki, Photoinduced Volume Transition in Liquid Crystalline Polymer Gels Swollen by a Nematic Solvent, ACS Macro Letters, 1(11), 1357-1361 (2012).

 263)

Yoshie Gotoh, Hiromasa Suzuki, Naomi Kumano, Takahiro Seki, Kiyofumi Katagiri, Yikazu Takeoka, An amorphous array of poly(N-isopropylacrylamide) brush-coated silica particles for thermally tunable angle-independent photonic band gap materials, New Journal of Chemistry, 36(12), 2171-2175 (2012).

262)

Hafiz Ashraful Haque, Shusaku Nagano, Takahiro Seki, Lubricant Effect of Flexible Chain in the Photoinduced Motions of Surface-Grafted Liquid Crystalline Azobenzene Polymer Brush, Macromolecules, 45(16), 6095–6103 (2012).

261)

Wenhan Li, Tomoki Dohi, Mitsuo Hara, Shusaku Nagano, Osamu Haba, Koichiro Yonetake, Takahiro Seki, Phototriggered Mass Migration Consorted with Surface Dewetting in Thin Films of a Liquid Crystalline Azobenzene-containing Dendrimer, Macromolecules, 45(16), 6618–6627 (2012).

260)

Shusaku Nagano, Yusuke Koizuka, Tomoya Murase, Masami Sano, Yuya Shinohara, Yoshiyuki Amemiya, Takahiro Seki, Synergy Effect on Morphology Switching: Real-Time Observation of Photo-Orientation of Microphase Separation in a Block Copolymer, Angewandte Chemie International Edition, 51(24), 5884–5888 (2012).

259)

Akira Sasaki, Hozumi Aoshima, Shusaku Nagano, Takahiro Seki, A versatile photochemical procedure to introduce a photoreactive molecular layer onto a polyimide film for liquid crystal alignment, Polymer Journal, 44, 639–645 (2012).

258)

Shun-ichiro Watanabe, Hisaaki Tanaka, Shin-ichi Kuroda, Akio Toda, Haruki Tomikawa, Shusaku Nagano, Takahiro Seki, Charge Transport Anisotropy due to Interfacial Molecular Orientation in Polymeric Transistors with Controlled In-Plane Chain Orientation, Applied Physics Express, 5, 021602-021604 (2012).

  2011

257)

Takashi Nakanishi, Masanobu Naito, Yukikazu Takeoka, Kazunori Matsuura, Versatile self-assembled hybrid systems with exotic structures and unique functions, Current Opinion in Colloid & Interface Science, 16(6), 482-490 (2011) (Invited Review).

256)

Koji Takagi, Takato Isomura, Yohei Ito, Masanori Sakaida, Shusaku Nagano, Takahiro Seki, Synthesis and isomerization of conjugated oligomers containing azoimidazole unit, Journal of Polymer Science, Part A: Polymer Chemistry, 49(23), 4993-5000 (2011).

255)

Shusaku Nagano, Opto-orientation control of microphase separation structure, Molecular Electronics and Bioelectronics, 22(2), 93-96 (2011).

254)

Shusaku Nagano, Tetsuya Kinumatsu, Yuki Ohnuma, Takahiro Seki, “Inversed” surface micelle array fabrication of an amphiphilic block copolymer on water surface, Journal of Nanoscience and Nanotechnology, 11(4), 2973-2978 (2011).

253)

Naomi Kumano, Takahiro Seki, Masahiko Ishii, Hiroshi Nakamura, Yukikazu Takeoka, Thunable Angle-Independent Structural Color from a Phase-Separated Porous Gel, Angewandte Chemie, International Edition, 50(17), 4012-4015 (2011) (highlighted in spektrumdirekt).

252)

Naomi Kumano, Takahiro Seki, Masahiko Ishii, Hiroshi Nakamura, Tomonari Umemura, Yukikazu Takeoka, Multicolor Polymer-Dispersed Liquid Crystal, Advanced Materials, 23(7), 884-888 (2011) (published as a frontispiece picture).

  2010

251)

Abu Bin Imran, Takahiro Seki, Yukikazu Takeoka, Recent advances in hydrogels in terms of fast stimuli responsiveness and superior mechanical performance, Polymer Journal, 42(11), 839-851 (2010).

250)

Kenji Aoki, Takafumi Iwata, Shusaku Nagano, Takahiro Seki Light-directed Anisotropic Reorientation of Mesopatterns in Block Copolymer Monolayer, Macromolecular Chemistry and Physics, 211(23), 2484-2489 (2010) (Top cover page featured).

249)

Hiromasa Suzuki, Muhammad Nurul Huda, Takahiro Seki, Taisuke Kawamoto, Hisashi Haga, Kazushige Kawabata, Yukikazu Takeoka, Precise Synthesis and Physicochemical Properties of High-Density, Polymer Brushes designed with Poly(N-isopropylacrylamide), Macromolecules, 43(23), 9945-9956 (2010).

248)

Muhammad Nurul Huda, Takahiro Seki, Hiromasa Suzuki, A. N. Kabir, Muhammad Harun-ur-Rashid, Yukikazu Takeoka, Characteristics of disperse poly(N-isopropylacrylamide) brushes on silicon surfaces by Atom transfer radical polymerization, Transaction of the Materials Research Society of Japan, 35(4), 845-848 (2010).

247)

Abu Bin Imran, Takahiro Seki, Kohzo Ito, Yukikazu Takeoka, Facile synthesis of sliding poly(NIPA) gels using a vinyl modified polyrotaxane as a Cross-linker, Transaction of the Materials Research Society of Japan, 35(4), 841-844 (2010).

246)

Mitsuo Hara, Shusaku Nagano, Takahiro Seki, p-p Interaction-induced Vertical Alignment of Silica Mesochannels Templated by a Discotic Lyotropic Liquid Crystal, Journal of the American Chemical Society, 132(39), 13654-13656 (2010).

245)

Abu Bin Imran, Takahiro Seki, Kohzo Ito, Yukikazu Takeoka, Poly(N-isopropylacrylamide) gel prepared using a hydrophilic polyrotaxane-based movable cross-linker, Macromolecules, 43, 1975-1980 (2010).

244)

Kunihiro Ichimura, Ken-ichi Aoki, Haruhisa Akiyama, Shin Horiuchi, Shusaku Nagano, Sinji Horie, Properties of core-shell structured nanopowders of molecular crystals fabricated by dry grinding, Journal of Materials Chemistry, 20, 4312-4320 (2010).

243)

Shun-ichiro Watanabe, Hisaaki Tanaka, Shin-ichi Kuroda, Akio Toda, Shusaku Nagano, Takahiro Seki, Atsushi Kimoto, and Jiro Abe, Electron spin resonance observation of field-induced charge carriers in ultrathin-film transistors of regioregular poly(3-hexylthiophene) with controlled in-plane chain orientation, Applied Physics Letters, 96(17), 173302 (2010).

242)

Jun Isayama, Shusaku Nagano, Takahiro Seki, Photo-triggered Mass Migrating Motions in Liquid Crystalline Azobenzene Polymer Films with Systematically Varied Thermal Properties, Macromolecules, 43(9), 4105-4112 (2010).

241)

Abu Bin Imran, Takahiro Seki, Kohzo Ito, and Yukikazu Takeoka, Poly(N-isopropylacrylamide) Gel Prepp-pd Using a Hydrophilic, Polyrotaxane-Based Movable Cross-Linker, Macromolecules, 43(4), 1975-1980 (2010).

240)

Abu Bin Imran, Takahiro Seki, Kohzo Ito, Yukikazu Takeoka, Hydrophobic and hydrophilic polyrotaxane based movable cross-linkers for thermo-sensitive poly(N-isopropylacrylamide) gels, Transaction of the Materials Research Society of Japan, 35, 291-297, (2010).

239)

Mohammad Harun-Ur-Rashid, Abu Bin Imran, Takahiro Seki, Hiroshi Nakamura, Yukikazu Takeoka, Angle Independent Structural Color in Colloidal Amorphous Arrays, ChemPhysChem, 11, 579-583 (2010).