Preparation of uncurled and planar multilayered graphene using polythiophene derivatives via liquid-phase exfoliation of graphite

Liquid-Phase Exfoliation of Graphite in a Low-Boiling-Point Solvent Using 2,6-Azulene-Based Conjugated Copolymers as Stabilizers

“…57,58 Those results are coherent with previous reports using CPs as stabilizers. For example, Maruyama and co-workers reported MLG with thickness ranging from 10 to 237 nm with a sonication time of 1 h. 34 Furthermore, as highlighted in recent studies by Coleman and co-workers, the LPE occurs in three stages where the third one only allows the exfoliation to thin flakes and is much more difficult to achieve without a very long sonication time. 59 To investigate the electrical properties of the composite material, we fabricated 6 films with C p ranging from 0.025 to 1.0 mg•mL −1 (named from G/PAz-0.025 to G/PAz-1.0).…”

“…In 2017, Maruyama et al used poly(3-hexylthiophene) (P3HT) as a dispersing agent in toluene before expanding their research in 2018, obtaining a graphene/P3HT composite with resistance as low as 28 Ω•sq −1 . 33,34 In 2018, Samori ̀et al used P3HT and poly [4-(4,4- [1,2,5]thiadiazolo- [3,4-c]pyridine] (PCDTPT) in o-dichlorobenzene, producing a composite exhibiting a charge mobility value 30 times higher than that of PCDTPT alone. 35 According to the authors, PCDTPT is more efficient at dispersing graphene than P3HT, which can be attributed to the more rigid and planar structure of PCDTPT.…”

“…To obtain single-layer graphene (SLG) and FLG, it is preferable to perform direct LPE, although the utilization of CPs as stabilizing agents during sonication-assisted LPE of pristine graphene has been scarcely used. In 2017, Maruyama et al used poly­(3-hexylthiophene) (P3HT) as a dispersing agent in toluene before expanding their research in 2018, obtaining a graphene/P3HT composite with resistance as low as 28 Ω·sq –1 . , In 2018, Samorì et al used P3HT and poly­[4-(4,4-dihexadecyl-4 H -cyclopenta­[1,2- b :5,4- b ′]­dithiophen-2-yl)- alt -[1,2,5]­thiadiazolo-[3,4- c ]­pyridine] (PCDTPT) in o -dichlorobenzene, producing a composite exhibiting a charge mobility value 30 times higher than that of PCDTPT alone . According to the authors, PCDTPT is more efficient at dispersing graphene than P3HT, which can be attributed to the more rigid and planar structure of PCDTPT.…”

Interaction of Graphene Quantum Dots with Oligothiophene: A Comprehensive Theoretical Study

“…40 Polythiophenes are π-conjugated polymers and can potentially exhibit π−π interactions with carbon nanomaterials such as carbon nanotubes, graphene, and graphene oxides and are used as conductive dispersant for graphene to obtain highly conductive patterns. 41 Polythiophene and its derivatives are considered most conductive polymers as they possess the ability to conduct electricity and high charge mobility. 42 The graphene composites with conducting polymers are not much explored theoretically and very few studies are available.…”

“…Polythiophene and graphene (PT/GR) composites are prepared by in situ polymerization, − plasma method, and chemical polymerization . Polythiophenes are π-conjugated polymers and can potentially exhibit π–π interactions with carbon nanomaterials such as carbon nanotubes, graphene, and graphene oxides and are used as conductive dispersant for graphene to obtain highly conductive patterns . Polythiophene and its derivatives are considered most conductive polymers as they possess the ability to conduct electricity and high charge mobility …”