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Issue 17, 2017
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Nanoimprinting-induced molecular orientation in poly(3-hexylthiophene) nanogratings and its extraordinary retention after thermal annealing

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Abstract

Nanoimprinting has been widely explored not only to simply fabricate topographical nanostructures, but also to induce preferential molecule orientations of conjugated polymer films. We demonstrate here that poly(3-hexylthiophene) (P3HT) film with a nanograting topography can be fabricated very readily by a simple and cost-effective solvent-assisted room-temperature nanoimprinting lithography (SART-NIL) method. Grazing incidence wide angle X-ray diffraction (GIWAXD) is employed to determine the molecular orientation transition from edge-on to face-on alignment in the nanograting P3HT film. Furthermore, variation of the thermal annealing temperature from 23 °C to 150 °C verifies that the highly ordered nanostructure morphology of the nanograting film nearly vanishes at elevated annealing temperatures; however, the nanoimprint-induced face-on molecule orientation is remarkably well retained within the distorted nanograting film. Surprisingly, the crystallization degree of the face-on alignment increases steadily and independently after thermal annealing.

Graphical abstract: Nanoimprinting-induced molecular orientation in poly(3-hexylthiophene) nanogratings and its extraordinary retention after thermal annealing

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Publication details

The article was received on 05 Mar 2017, accepted on 24 Mar 2017 and first published on 28 Mar 2017


Article type: Paper
DOI: 10.1039/C7PY00378A
Citation: Polym. Chem., 2017,8, 2666-2674
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    Nanoimprinting-induced molecular orientation in poly(3-hexylthiophene) nanogratings and its extraordinary retention after thermal annealing

    G. Ding, K. Wang, X. Li, C. Wang, Z. Hu and J. Liu, Polym. Chem., 2017, 8, 2666
    DOI: 10.1039/C7PY00378A

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