High-Density and Monolayer-Level Integration of π-Conjugated Units: Amphiphilic Carbazole Homopolymer Langmuir-Blodgett Films

Langmuir : the ACS Journal of Surfaces and Colloids
Shunsuke YamamotoMasaya Mitsuishi

Abstract

Precise integration of π-conjugated units is a key issue to achieve molecular (nano) electronic devices based on organic semiconductor materials. We specifically examine the Langmuir-Blodgett technique, which allows high-density integration of π-conjugated units. In this study, we designed a carbazole containing acrylamide-based homopolymer [poly(9-ethyl-3-carbazolyl acrylamide) (pCzAA)], in which the π-conjugated unit is connected with a hydrophilic amide unit directly as a side chain. Its Langmuir-Blodgett film formation properties were investigated. The pCzAA polymer took a stable monolayer formation in the presence of a small amount (ca. 10 mol %) of poly( N-dodecylacrylamide) (pDDA). Compared with amphiphilic carbazole-containing copolymers described in earlier reports, the direct connection of π-conjugated units through amide bonding enables the Cz content in monolayers to exceed that of the copolymer monolayers (ca. 30 mol %) dramatically. pCzAA:pDDA takes highly ordered layer structures toward the out-of-plane direction, although no structural order is formed in the in-plane direction. This method is a practical means to develop low-dimensional and high-density integration of π-conjugated units for molecular electronics.

References

Nov 13, 2004·Chemical Reviews·Daniel R Talham
Jun 1, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Jun MatsuiTokuji Miyashita
May 17, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Bingbing LiAlan R Esker
Aug 23, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Shusaku NaganoTakahiro Seki
Oct 6, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Jin Young ParkRigoberto C Advincula
Jun 26, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Yuya IshizakiMasaya Mitsuishi

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Citations

Mar 26, 2019·Accounts of Chemical Research·Chong-An DiDaoben Zhu
Jun 13, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·M Mahbubul BasharMasaya Mitsuishi
Jun 6, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Katsuhiko Ariga
Aug 26, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Shunsuke YamamotoMasaya Mitsuishi
Jan 6, 2022·ACS Applied Materials & Interfaces·Chen FangGao Liu

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