Growth of long triisopropylsilylethynyl pentacene (TIPS-PEN) nanofibrils in a polymer thin film during spin-coating.
This study demonstrates the growth of long triisopropylsilyethynyl pentacene (TIPS-PEN) nanofibrils in a thin film of a crystalline polymer, poly(ε-caprolactone) (PCL). During spin-coating, TIPS-PEN molecules are locally extracted around the PCL grain boundaries and they crystallize into [010] direction forming long nanofibrils. Molecular weight of PCL and weight fraction (α) of TIPS-PEN in PCL matrix are key factors to the growth of nanofibrils. Long high-quality TIPS-PEN nanofibrils are obtained with high-molecular-weight PCL and at the α values in the range of 0.03-0.1. The long nanofibrils are used as an active layer in a field-effect organic transistor.
Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seoul, Republic of Korea.
Minwoo
M
Park
Yuho
Y
Min
Yu-Jeong
YJ
Lee
Unyong
U
Jeong
D008970:Molecular Weight; D057139:Nanofibers / Q000737:chemistry*; D009279:Naphthacenes / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*
D009279:Naphthacenes; D011108:Polymers; C523499:pentacene
nanofibril; organic semiconductor; organic transistor; pentacene; phase separation