TY - JOUR
T1 - Air-Liquid Interfacial Self-Assembly of Non-Amphiphilic Poly(3-hexylthiophene) Homopolymers
AU - Oh, Saejin
AU - Yang, Myungjae
AU - Bouffard, Jean
AU - Hong, Seunghun
AU - Park, So Jung
N1 - Funding Information:
This work was supported by Samsung Research Funding Center of Samsung Electronics under Project Number SRFC-MA1501-05. S.H. acknowledges the support from the NRF grant (H-GUARD 2013M3A6B2078961).
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/4/12
Y1 - 2017/4/12
N2 - Here, we demonstrate that the self-assembly of poly(3-hexylthiophene) (P3HT) at the air-water interface can lead to free-standing films of densely packed P3HT nanowires. Interfacial self-assembly on various liquid subphases, such as water, diethylene glycol, and glycerol, indicates that the viscosity of the subphase is an important factor for the formation of well-ordered nanostructures. The thin-film morphology is also sensitive to the concentration of P3HT, its molecular weight (MW), and the presence of oxidative defects. The densely packed nanowire films can be easily transferred to solid substrates for device applications. The ultrathin films of P3HT prepared by the interfacial assembly showed significantly higher hole mobility (∼3.6 × 10-2 cm2/V s) in a field-effect transistor than comparably thin spin-cast films. This work demonstrates that the air-liquid interfacial assembly is not limited to amphiphilic polymers and can, under optimized conditions, be applied to fabricate ultrathin films of widely used conjugated polymers with controlled morphologies.
AB - Here, we demonstrate that the self-assembly of poly(3-hexylthiophene) (P3HT) at the air-water interface can lead to free-standing films of densely packed P3HT nanowires. Interfacial self-assembly on various liquid subphases, such as water, diethylene glycol, and glycerol, indicates that the viscosity of the subphase is an important factor for the formation of well-ordered nanostructures. The thin-film morphology is also sensitive to the concentration of P3HT, its molecular weight (MW), and the presence of oxidative defects. The densely packed nanowire films can be easily transferred to solid substrates for device applications. The ultrathin films of P3HT prepared by the interfacial assembly showed significantly higher hole mobility (∼3.6 × 10-2 cm2/V s) in a field-effect transistor than comparably thin spin-cast films. This work demonstrates that the air-liquid interfacial assembly is not limited to amphiphilic polymers and can, under optimized conditions, be applied to fabricate ultrathin films of widely used conjugated polymers with controlled morphologies.
KW - air-liquid interface
KW - Conjugated polymer
KW - field-effect transistor
KW - nanowire
KW - self-assembly
UR - http://www.scopus.com/inward/record.url?scp=85017558892&partnerID=8YFLogxK
U2 - 10.1021/acsami.7b01058
DO - 10.1021/acsami.7b01058
M3 - Article
C2 - 28337903
AN - SCOPUS:85017558892
SN - 1944-8244
VL - 9
SP - 12865
EP - 12871
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 14
ER -