Reversible Control of Radius and Morphology of Fluorene-Azobenzene Copolymer Nanowires by Light Exposure

被引：10

作者：

Cheng, Hoi Lok ^{[1
,2
]}

Tang, Michael T. ^{[1
,3
]}

Tuchinda, Wasin ^{[1
,2
]}

Enomoto, Kazuyuki ^{[1
,2
]}

Chiba, Atsuya ^{[4
]}

Saito, Yuichi ^{[4
]}

Kamiya, Tomihiro ^{[4
]}

Sugimoto, Masaki ^{[4
]}

Saeki, Akinori ^{[1
]}

Sakurai, Tsuneaki ^{[1
]}

Omichi, Masaaki ^{[1
]}

Sakamaki, Daisuke ^{[1
]}

Seki, Shu ^{[1
,2
]}

机构：

[1] Osaka Univ, Dept Appl Chem, Grad Sch Engn, Suita, Osaka 5650871, Japan

[2] Osaka Univ, Int Coll, Toyonaka, Osaka 5600043, Japan

[3] Univ Calif San Diego, Dept Nanoengn, Warren Coll, La Jolla, CA 92093 USA

[4] Japan Atom Energy Agcy, Takasaki Adv Radiat Res Inst, Takasaki, Gunma 3701292, Japan

来源：

ADVANCED MATERIALS INTERFACES | 2015年 / 2卷 / 01期

关键词：

CONJUGATED POLYMERS; FABRICATION; ENERGY; MEMORIES; MOIETIES;

D O I：

10.1002/admi.201400450

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The preparation of photoresponsive polymer nanowires comprising photochromic azobenzene (Azo) and p-conjugated fluorene (FO) units is reported. Well-defined and uniform nanowires of the copolymer (PFOAzo) were successfully fabricated by the single particle nanofabrication technique after optimizing the FO: Azo ratio and the development conditions. Azo units in the PFOAzo nanowires underwent reversible trans-cis-trans isomerization upon exposure to ultraviolet or visible light, leading to changes in the radius (between ca. 6 and 8 nm) and morphology (straight or wavy) of the nanowires. The oligo(alkylfluorene) units in the backbone are found to profit the crosslinking efficiency upon high-energy ion beam irradiation, and more importantly, provide sufficient flexibility to allow reversible photoswitching. This demonstration of the photoluminescence, semiconducting, and mechanical properties of the PFOAzo nanowires is an important advance in the evolution of electro-mechanical nanomaterials.

引用

页数：9

共 44 条

[1] Light-Switchable and Monodisperse Conjugated Polymer Particles [J].

Anwar, Naveed ;

Willms, Thomas ;

Grimme, Benjamin ;

Kuehne, Alexander J. C. .

ACS MACRO LETTERS, 2013, 2 (09) :766-769

[2] Fabrication and Arrangement of "Clickable" Nanowires by the Single-Particle Nanofabrication Technique [J].

Asano, Atsushi ;

Omichi, Masaaki ;

Tsukuda, Satoshi ;

Takano, Katsuyoshi ;

Sugimoto, Masaki ;

Saeki, Akinori ;

Seki, Shu .

JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (32) :17274-17279

[3] Photoisomerization in different classes of azobenzene [J].

Bandara, H. M. Dhammika ;

Burdette, Shawn C. .

CHEMICAL SOCIETY REVIEWS, 2012, 41 (05) :1809-1825

[4] Spiropyrans and spirooxazines for memories and switches [J].

Berkovic, G ;

Krongauz, V ;

Weiss, V .

CHEMICAL REVIEWS, 2000, 100 (05) :1741-1753

[5] Combining Axial and Radial Nanowire Heterostructures: Radial Esaki Diodes and Tunnel Field-Effect Transistors [J].

Dey, Anil W. ;

Svensson, Johannes ;

Ek, Martin ;

Lind, Erik ;

Thelander, Claes ;

Wernersson, Lars-Erik .

NANO LETTERS, 2013, 13 (12) :5919-5924

[6] A Review of Mechanical and Electromechanical Properties of Piezoelectric Nanowires [J].

Espinosa, Horacio D. ;

Bernal, Rodrigo A. ;

Minary-Jolandan, Majid .

ADVANCED MATERIALS, 2012, 24 (34) :4656-4675

[7] Large-Area Three-Dimensional Molecular Ordering of a Polymer Brush by One-Step Processing [J].

Hosono, Nobuhiko ;

Kajitani, Takashi ;

Fukushima, Takanori ;

Ito, Kazuki ;

Sasaki, Sono ;

Takata, Masaki ;

Aida, Takuzo .

SCIENCE, 2010, 330 (6005) :808-811

[8]

Iamsaard S, 2014, NAT CHEM, V6, P229, DOI [10.1038/NCHEM.1859, 10.1038/nchem.1859]

[9] Photomechanics of liquid-crystalline elastomers and other polymers [J].

Ikeda, Tomiki ;

Mamiya, Jun-ichi ;

Yu, Yanlei .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2007, 46 (04) :506-528

[10] Supramolecular Functionalization of Single-Walled Carbon Nanotubes (SWNTs) with a Photoisomerizable Conjugated Polymer [J].

Imin, Patigul ;

Imit, Mokhtar ;

Adronov, Alex .

MACROMOLECULES, 2012, 45 (12) :5045-5050

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