Photochromism induced magnetization changes in Prussian Blue ultrathin films fabricated into the Langmuir-Blodgett films composed of an amphiphilic azobenzene and a deoxyribonucleic acid

Takashi Yamamoto; Yasushi Umemura; Masaru Nakagawa; Tomokazu Iyoda; Yasuaki Einaga

doi:10.1016/j.tsf.2007.01.019

Photochromism induced magnetization changes in Prussian Blue ultrathin films fabricated into the Langmuir-Blodgett films composed of an amphiphilic azobenzene and a deoxyribonucleic acid

Takashi Yamamoto, Yasushi Umemura, Masaru Nakagawa, Tomokazu Iyoda, Yasuaki Einaga

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

A photomagnetic ultrathin film consisting of an azobenzene, a deoxyribonucleic acid, and Prussian Blue has been fabricated by the Langmuir-Blodgett method. Prussian Blue layers in the films were a two-dimensional structure with the height of 50 Å and the average coherence length of 210 Å. Reversible photoisomerization of the azobenzenes was observed even in the films. The films exhibit the long-range ferromagnetic order below 4.2 K and moreover, upon photoillumination at 2 K, reversible changes in the magnetization were realized with the value of ca. 1.0%. This photoswitching in the magnetization is due to changes in the electrostatic field induced by photoisomerization.

Original language	English
Pages (from-to)	5476-5483
Number of pages	8
Journal	Thin Solid Films
Volume	515
Issue number	13
DOIs	https://doi.org/10.1016/j.tsf.2007.01.019
Publication status	Published - 2007 May 7

Keywords

Langmuir-Blodgett Films
Organic-inorganic composite
Photochromism
Photomagnet

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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10.1016/j.tsf.2007.01.019

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Photochromism induced magnetization changes in Prussian Blue ultrathin films fabricated into the Langmuir-Blodgett films composed of an amphiphilic azobenzene and a deoxyribonucleic acid. / Yamamoto, Takashi; Umemura, Yasushi; Nakagawa, Masaru et al.

In: Thin Solid Films, Vol. 515, No. 13, 07.05.2007, p. 5476-5483.

Research output: Contribution to journal › Article › peer-review

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title = "Photochromism induced magnetization changes in Prussian Blue ultrathin films fabricated into the Langmuir-Blodgett films composed of an amphiphilic azobenzene and a deoxyribonucleic acid",

abstract = "A photomagnetic ultrathin film consisting of an azobenzene, a deoxyribonucleic acid, and Prussian Blue has been fabricated by the Langmuir-Blodgett method. Prussian Blue layers in the films were a two-dimensional structure with the height of 50 {\AA} and the average coherence length of 210 {\AA}. Reversible photoisomerization of the azobenzenes was observed even in the films. The films exhibit the long-range ferromagnetic order below 4.2 K and moreover, upon photoillumination at 2 K, reversible changes in the magnetization were realized with the value of ca. 1.0%. This photoswitching in the magnetization is due to changes in the electrostatic field induced by photoisomerization.",

keywords = "Langmuir-Blodgett Films, Organic-inorganic composite, Photochromism, Photomagnet",

author = "Takashi Yamamoto and Yasushi Umemura and Masaru Nakagawa and Tomokazu Iyoda and Yasuaki Einaga",

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research on Priority Area (417) and the 21st Century COE program “KEIO Life Conjugate Chemistry” from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of the Japanese Government.",

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AU - Yamamoto, Takashi

AU - Umemura, Yasushi

AU - Nakagawa, Masaru

AU - Iyoda, Tomokazu

AU - Einaga, Yasuaki

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research on Priority Area (417) and the 21st Century COE program “KEIO Life Conjugate Chemistry” from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of the Japanese Government.

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N2 - A photomagnetic ultrathin film consisting of an azobenzene, a deoxyribonucleic acid, and Prussian Blue has been fabricated by the Langmuir-Blodgett method. Prussian Blue layers in the films were a two-dimensional structure with the height of 50 Å and the average coherence length of 210 Å. Reversible photoisomerization of the azobenzenes was observed even in the films. The films exhibit the long-range ferromagnetic order below 4.2 K and moreover, upon photoillumination at 2 K, reversible changes in the magnetization were realized with the value of ca. 1.0%. This photoswitching in the magnetization is due to changes in the electrostatic field induced by photoisomerization.

AB - A photomagnetic ultrathin film consisting of an azobenzene, a deoxyribonucleic acid, and Prussian Blue has been fabricated by the Langmuir-Blodgett method. Prussian Blue layers in the films were a two-dimensional structure with the height of 50 Å and the average coherence length of 210 Å. Reversible photoisomerization of the azobenzenes was observed even in the films. The films exhibit the long-range ferromagnetic order below 4.2 K and moreover, upon photoillumination at 2 K, reversible changes in the magnetization were realized with the value of ca. 1.0%. This photoswitching in the magnetization is due to changes in the electrostatic field induced by photoisomerization.

KW - Langmuir-Blodgett Films

KW - Organic-inorganic composite

KW - Photochromism

KW - Photomagnet

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Photochromism induced magnetization changes in Prussian Blue ultrathin films fabricated into the Langmuir-Blodgett films composed of an amphiphilic azobenzene and a deoxyribonucleic acid

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