TY - JOUR
T1 - Ionic liquid-assisted vapor deposition and polymorphs control of 2,2′:5′,2″-terthiophene crystals
AU - Okawara, Keisuke
AU - Maruyama, Shingo
AU - Matsumoto, Yuji
PY - 2019/1/1
Y1 - 2019/1/1
N2 - In this work we investigated possible effects of nanoscale ionic liquid (IL) on the crystal growth of 2,2′:5′,2″-terthiophen (3T), a well-known oligomer source for conducting polymers, and its polymorphs control (high- and low-temperature phases, respectively) in vapor deposition. In the vapor deposition via a bulky IL droplet as well as without IL, the low-temperature phase was dominant at a deposition temperature as low as 6 °C-7 °C, and there were large 3T platelet single crystals (several tens of μm in size) of the low-temperature phase obtained in the bulky IL droplet. In contrast, when 3T molecules were deposited via thin film IL in the thickness range of 1-100 nm, the high-temperature phase could be much stabilized even at a deposition temperature of 6 °C, and especially for a few nm thick IL a nearly single high-temperature phase of 3T crystal films was effectively obtained.
AB - In this work we investigated possible effects of nanoscale ionic liquid (IL) on the crystal growth of 2,2′:5′,2″-terthiophen (3T), a well-known oligomer source for conducting polymers, and its polymorphs control (high- and low-temperature phases, respectively) in vapor deposition. In the vapor deposition via a bulky IL droplet as well as without IL, the low-temperature phase was dominant at a deposition temperature as low as 6 °C-7 °C, and there were large 3T platelet single crystals (several tens of μm in size) of the low-temperature phase obtained in the bulky IL droplet. In contrast, when 3T molecules were deposited via thin film IL in the thickness range of 1-100 nm, the high-temperature phase could be much stabilized even at a deposition temperature of 6 °C, and especially for a few nm thick IL a nearly single high-temperature phase of 3T crystal films was effectively obtained.
UR - http://www.scopus.com/inward/record.url?scp=85072520874&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85072520874&partnerID=8YFLogxK
U2 - 10.7567/1347-4065/ab3067
DO - 10.7567/1347-4065/ab3067
M3 - Article
AN - SCOPUS:85072520874
VL - 58
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 8
M1 - 085503
ER -