TY - JOUR
T1 - Self-assembling superstructures of cyclosiloxane amphiphiles with complex flower shapes and superhydrophobic properties
AU - Zhu, Huie
AU - Buchtal, Tillman Jan
AU - Mitsuishi, Masaya
N1 - Funding Information:
This work was partially supported by the Grant-in-Aid for Early-Career Scientists (19K15625) from the Japan Society for the Promotion of Science (JSPS) and for research in Innovative Areas (15H00719) from the Ministry of Education, Culture, Sports, Science, and Technology in Japan (MEXT). This work was also supported by the Cooperative Research Program “Network Joint Research Center for Materials and Devices: Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials (MEXT), Tohoku University Center for Gender Equality Promotion (TUMUG), and Polymer Hybrid Materials Research (PHyM) Center Project, Tohoku University. Furthermore, we are grateful to the Material Solutions Center (MaSC), Tohoku University, for allowing us to use their X-ray diffractometer. MM thanks the Ogasawara Foundation for the Promotion of Science & Engineering for financial support.
Funding Information:
This work was partially supported by the Grant-in-Aid for Early-Career Scientists ( 19K15625 ) from the Japan Society for the Promotion of Science (JSPS) and for research in Innovative Areas ( 15H00719 ) from the Ministry of Education, Culture, Sports, Science, and Technology in Japan ( MEXT ). This work was also supported by the Cooperative Research Program “Network Joint Research Center for Materials and Devices: Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials (MEXT), Tohoku University Center for Gender Equality Promotion (TUMUG), and Polymer Hybrid Materials Research (PHyM) Center Project, Tohoku University. Furthermore, we are grateful to the Material Solutions Center (MaSC), Tohoku University, for allowing us to use their X-ray diffractometer. MM thanks the Ogasawara Foundation for the Promotion of Science & Engineering for financial support.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/10/15
Y1 - 2021/10/15
N2 - Complex flower-shaped superstructures (FSSs) have rarely been reported in pure organic systems with a single soft organic molecule without rigid skeletons. Herein, simple self-assembled complex FSSs using amphiphilic organic cyclosiloxane amphiphiles are obtained through a drop-casting solution process. The synergetic effect of amide–amide hydrogen bonding/alkyl hydrophobic interactions can be tuned to generate “flower petals” with either straight ligulate or curved-plate rosaceous corolla shapes. The step-wise petal formation process is also investigated using scanning electron microscopy. Furthermore, FSSs with different petal shapes with varying surface “wettabilities” are demonstrated. The ligulate-like structure forms a networked porous surface that can suspend water droplets with a non-wet contact mode, i.e., a slippery superhydrophoborphobic surface. The surface of the rosaceous corolla petals exhibits a wet-contact mode with respect to the water droplet with sticky superhydrophobicity. The results play a significant role in understanding the structure and properties of self-assembled FSSs, thereby shedding new light on developing new hierarchical materials from soft organic amphiphiles in the future.
AB - Complex flower-shaped superstructures (FSSs) have rarely been reported in pure organic systems with a single soft organic molecule without rigid skeletons. Herein, simple self-assembled complex FSSs using amphiphilic organic cyclosiloxane amphiphiles are obtained through a drop-casting solution process. The synergetic effect of amide–amide hydrogen bonding/alkyl hydrophobic interactions can be tuned to generate “flower petals” with either straight ligulate or curved-plate rosaceous corolla shapes. The step-wise petal formation process is also investigated using scanning electron microscopy. Furthermore, FSSs with different petal shapes with varying surface “wettabilities” are demonstrated. The ligulate-like structure forms a networked porous surface that can suspend water droplets with a non-wet contact mode, i.e., a slippery superhydrophoborphobic surface. The surface of the rosaceous corolla petals exhibits a wet-contact mode with respect to the water droplet with sticky superhydrophobicity. The results play a significant role in understanding the structure and properties of self-assembled FSSs, thereby shedding new light on developing new hierarchical materials from soft organic amphiphiles in the future.
KW - Amphiphiles
KW - Complex flower-shaped superstructures
KW - Cyclosiloxane
KW - Superhydrophobicity
UR - http://www.scopus.com/inward/record.url?scp=85108079942&partnerID=8YFLogxK
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U2 - 10.1016/j.apsusc.2021.150245
DO - 10.1016/j.apsusc.2021.150245
M3 - Article
AN - SCOPUS:85108079942
VL - 563
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
M1 - 150245
ER -