Chapter 13
Creation of Organic-Metal Hybridized
Nanocrystals Toward Nonlinear Optics
Applications
Tsunenobu Onodera, Rodrigo Sato, Yoshihiko Takeda,
and Hidetoshi Oikawa
Abstract Organic nanocrystals are occupied in an intermediate state between single
molecule and the corresponding molecular crystal in a bulk state, which are fabricated in common by using the reprecipitation method. The crystal size is in the
range of several tens nanometer to sub-micrometer. In particular, linear optical properties such as excitonic absorption spectrum and fluorescence emission spectrum
are evidently dependent on crystal size, owing to thermally soften nanocrystal lattice
with increasing specific surface area. Core–shell-type hybridization between organic
nanocrystals and novel metal nanoparticles is of too much interest in current material science. In this chapter, creation of polydiacetylene nanocrystal fibers hybridized
with gold nanoparticles will be introduced in details toward nonlinear optics applications. Polydiacetylene is typically one-dimensional π-conjugated polymer, and one
of the most promising organic nonlinear optical materials. It is expected that nonlinear
optical properties would be enhanced because of peculiar optoelectronic interaction
between exciton in polydiacetylene and localized surface plasmon resonance effect
in gold nanoparticles.
Keywords Polydiacetylene · Nanocrystal fiber · Nonlinear optical property ·
Exciton · Localized surface plasmon resonance
T. Onodera · H. Oikawa (B)
Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University,
Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
e-mail: hidetoshi.oikawa.e8@tohoku.ac.jp
R. Sato · Y. Takeda
Hydrogen Materials Engineering Group, Center for Green Research on Energy and
Environmental Materials, National Institute for Materials Science (NIMS), Sakura 3-13,
Tsukuba 305-0003, Japan
© Springer Nature Singapore Pte Ltd. 2020
M. Sakamoto and H. Uekusa (eds.), Advances in Organic Crystal Chemistry,
https://doi.org/10.1007/978-981-15-5085-0_13
251
Creation of Organic-Metal Hybridized
Nanocrystals Toward Nonlinear Optics
Applications
Tsunenobu Onodera, Rodrigo Sato, Yoshihiko Takeda,
and Hidetoshi Oikawa
Abstract Organic nanocrystals are occupied in an intermediate state between single
molecule and the corresponding molecular crystal in a bulk state, which are fabricated in common by using the reprecipitation method. The crystal size is in the
range of several tens nanometer to sub-micrometer. In particular, linear optical properties such as excitonic absorption spectrum and fluorescence emission spectrum
are evidently dependent on crystal size, owing to thermally soften nanocrystal lattice
with increasing specific surface area. Core–shell-type hybridization between organic
nanocrystals and novel metal nanoparticles is of too much interest in current material science. In this chapter, creation of polydiacetylene nanocrystal fibers hybridized
with gold nanoparticles will be introduced in details toward nonlinear optics applications. Polydiacetylene is typically one-dimensional π-conjugated polymer, and one
of the most promising organic nonlinear optical materials. It is expected that nonlinear
optical properties would be enhanced because of peculiar optoelectronic interaction
between exciton in polydiacetylene and localized surface plasmon resonance effect
in gold nanoparticles.
Keywords Polydiacetylene · Nanocrystal fiber · Nonlinear optical property ·
Exciton · Localized surface plasmon resonance
T. Onodera · H. Oikawa (B)
Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University,
Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
e-mail: hidetoshi.oikawa.e8@tohoku.ac.jp
R. Sato · Y. Takeda
Hydrogen Materials Engineering Group, Center for Green Research on Energy and
Environmental Materials, National Institute for Materials Science (NIMS), Sakura 3-13,
Tsukuba 305-0003, Japan
© Springer Nature Singapore Pte Ltd. 2020
M. Sakamoto and H. Uekusa (eds.), Advances in Organic Crystal Chemistry,
https://doi.org/10.1007/978-981-15-5085-0_13
251