%0 Online Multimedia %A Inoue, Hiroki %A Hirai, Tomoyasu %A Hanochi, Haruka %A Oyama, Keigo %A Mayama, Hiroyuki %A Nakamura, Yoshinobu %A Fujii, Syuji %D 2019 %T Poly(3-hexylthiophene) Grains Synthesized by Solvent-Free Oxidative Coupling Polymerization and Their Use as Light-Responsive Liquid Marble Stabilizer %U https://acs.figshare.com/articles/media/Poly_3-hexylthiophene_Grains_Synthesized_by_Solvent-Free_Oxidative_Coupling_Polymerization_and_Their_Use_as_Light-Responsive_Liquid_Marble_Stabilizer/7575554 %R 10.1021/acs.macromol.8b02426.s003 %2 https://acs.figshare.com/ndownloader/files/14072282 %K water surface %K FeCl 3 oxidant %K X-ray photoelectron spectroscopy studies %K Solubility test %K chloride ions %K Solvent-Free Oxidative %K near-infrared laser-induced Marangoni flow %K near-infrared laser irradiation %K poly %K hexyl side chains %K 3- hexylthiophene %K marble stabilizer %K surface tension %K 1 H %K light-to-heat photothermal property %K temperature increase %K resonance studies %K photothermal property %K Light-Responsive Liquid Marble Stabilizer Solvent-free oxidative %K scanning electron microscopy studies %X Solvent-free oxidative coupling polymerization of 3-hexylthiophene using FeCl3 oxidant was conducted to synthesize poly­(3-hexylthiophene) grains. Optical and scanning electron microscopy studies confirmed production of submillimeter-sized atypical grains with rough surfaces. Solubility test, Fourier transform infrared spectroscopy, and 1H nuclear magnetic resonance studies indicated the branching and cross-linking of the poly­(3-hexylthiophene). Elemental microanalysis and X-ray photoelectron spectroscopy studies confirmed that the poly­(3-hexylthiophene) grains were doped with chloride ions. The poly­(3-hexylthiophene) grains showed hydrophobic character due to hexyl side chains, and the critical surface tension was determined to be 25.9 mN m–1. The poly­(3-hexylthiophene) showed a light-to-heat photothermal property, and near-infrared laser irradiation to the poly­(3-hexylthiophene) grains induced a rapid temperature increase up to 664 °C. The poly­(3-hexylthiophene) grains can work as an effective liquid marble stabilizer with a photothermal property, and the liquid marble exhibited locomotion on a water surface due to near-infrared laser-induced Marangoni flow. %I ACS Publications