Epitaxially Grown Strained Pentacene Thin Film on Graphene Membrane

Kwanpyo Kim, Elton J.G. Santos, Tae Hoon Lee, Yoshio Nishi, Zhenan Bao

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Organic-graphene system has emerged as a new platform for various applications such as flexible organic photovoltaics and organic light emitting diodes. Due to its important implication in charge transport, the study and reliable control of molecular packing structures at the graphene-molecule interface are of great importance for successful incorporation of graphene in related organic devices. Here, an ideal membrane of suspended graphene as a molecular assembly template is utilized to investigate thin-film epitaxial behaviors. Using transmission electron microscopy, two distinct molecular packing structures of pentacene on graphene are found. One observed packing structure is similar to the well-known bulk-phase, which adapts a face-on molecular orientation on graphene substrate. On the other hand, a rare polymorph of pentacene crystal, which shows significant strain along the c-axis, is identified. In particular, the strained film exhibits a specific molecular orientation and a strong azimuthal correlation with underlying graphene. Through ab initio electronic structure calculations, including van der Waals interactions, the unusual polymorph is attributed to the strong graphene-pentacene interaction. The observed strained organic film growth on graphene demonstrates the possibility to tune molecular packing via graphene-molecule interactions. Graphene can induce the growth of a rarely-observed pentacene polymorph through graphene-molecule interaction.

Original languageEnglish
Pages (from-to)2037-2043
Number of pages7
JournalSmall
Volume11
Issue number17
DOIs
Publication statusPublished - 2015 May 6

Fingerprint

Graphite
Graphene
Membranes
Thin films
Polymorphism
Molecular orientation
Molecular Structure
Molecules
pentacene
Organic light emitting diodes (OLED)
Film growth
Growth
Transmission Electron Microscopy
Electronic structure
Charge transfer

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

Cite this

Kim, K., Santos, E. J. G., Lee, T. H., Nishi, Y., & Bao, Z. (2015). Epitaxially Grown Strained Pentacene Thin Film on Graphene Membrane. Small, 11(17), 2037-2043. https://doi.org/10.1002/smll.201403006
Kim, Kwanpyo ; Santos, Elton J.G. ; Lee, Tae Hoon ; Nishi, Yoshio ; Bao, Zhenan. / Epitaxially Grown Strained Pentacene Thin Film on Graphene Membrane. In: Small. 2015 ; Vol. 11, No. 17. pp. 2037-2043.
@article{0acb5f503b4b4edfa130758b2d5d81ec,
title = "Epitaxially Grown Strained Pentacene Thin Film on Graphene Membrane",
abstract = "Organic-graphene system has emerged as a new platform for various applications such as flexible organic photovoltaics and organic light emitting diodes. Due to its important implication in charge transport, the study and reliable control of molecular packing structures at the graphene-molecule interface are of great importance for successful incorporation of graphene in related organic devices. Here, an ideal membrane of suspended graphene as a molecular assembly template is utilized to investigate thin-film epitaxial behaviors. Using transmission electron microscopy, two distinct molecular packing structures of pentacene on graphene are found. One observed packing structure is similar to the well-known bulk-phase, which adapts a face-on molecular orientation on graphene substrate. On the other hand, a rare polymorph of pentacene crystal, which shows significant strain along the c-axis, is identified. In particular, the strained film exhibits a specific molecular orientation and a strong azimuthal correlation with underlying graphene. Through ab initio electronic structure calculations, including van der Waals interactions, the unusual polymorph is attributed to the strong graphene-pentacene interaction. The observed strained organic film growth on graphene demonstrates the possibility to tune molecular packing via graphene-molecule interactions. Graphene can induce the growth of a rarely-observed pentacene polymorph through graphene-molecule interaction.",
author = "Kwanpyo Kim and Santos, {Elton J.G.} and Lee, {Tae Hoon} and Yoshio Nishi and Zhenan Bao",
year = "2015",
month = "5",
day = "6",
doi = "10.1002/smll.201403006",
language = "English",
volume = "11",
pages = "2037--2043",
journal = "Small",
issn = "1613-6810",
publisher = "Wiley-VCH Verlag",
number = "17",

}

Kim, K, Santos, EJG, Lee, TH, Nishi, Y & Bao, Z 2015, 'Epitaxially Grown Strained Pentacene Thin Film on Graphene Membrane', Small, vol. 11, no. 17, pp. 2037-2043. https://doi.org/10.1002/smll.201403006

Epitaxially Grown Strained Pentacene Thin Film on Graphene Membrane. / Kim, Kwanpyo; Santos, Elton J.G.; Lee, Tae Hoon; Nishi, Yoshio; Bao, Zhenan.

In: Small, Vol. 11, No. 17, 06.05.2015, p. 2037-2043.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Epitaxially Grown Strained Pentacene Thin Film on Graphene Membrane

AU - Kim, Kwanpyo

AU - Santos, Elton J.G.

AU - Lee, Tae Hoon

AU - Nishi, Yoshio

AU - Bao, Zhenan

PY - 2015/5/6

Y1 - 2015/5/6

N2 - Organic-graphene system has emerged as a new platform for various applications such as flexible organic photovoltaics and organic light emitting diodes. Due to its important implication in charge transport, the study and reliable control of molecular packing structures at the graphene-molecule interface are of great importance for successful incorporation of graphene in related organic devices. Here, an ideal membrane of suspended graphene as a molecular assembly template is utilized to investigate thin-film epitaxial behaviors. Using transmission electron microscopy, two distinct molecular packing structures of pentacene on graphene are found. One observed packing structure is similar to the well-known bulk-phase, which adapts a face-on molecular orientation on graphene substrate. On the other hand, a rare polymorph of pentacene crystal, which shows significant strain along the c-axis, is identified. In particular, the strained film exhibits a specific molecular orientation and a strong azimuthal correlation with underlying graphene. Through ab initio electronic structure calculations, including van der Waals interactions, the unusual polymorph is attributed to the strong graphene-pentacene interaction. The observed strained organic film growth on graphene demonstrates the possibility to tune molecular packing via graphene-molecule interactions. Graphene can induce the growth of a rarely-observed pentacene polymorph through graphene-molecule interaction.

AB - Organic-graphene system has emerged as a new platform for various applications such as flexible organic photovoltaics and organic light emitting diodes. Due to its important implication in charge transport, the study and reliable control of molecular packing structures at the graphene-molecule interface are of great importance for successful incorporation of graphene in related organic devices. Here, an ideal membrane of suspended graphene as a molecular assembly template is utilized to investigate thin-film epitaxial behaviors. Using transmission electron microscopy, two distinct molecular packing structures of pentacene on graphene are found. One observed packing structure is similar to the well-known bulk-phase, which adapts a face-on molecular orientation on graphene substrate. On the other hand, a rare polymorph of pentacene crystal, which shows significant strain along the c-axis, is identified. In particular, the strained film exhibits a specific molecular orientation and a strong azimuthal correlation with underlying graphene. Through ab initio electronic structure calculations, including van der Waals interactions, the unusual polymorph is attributed to the strong graphene-pentacene interaction. The observed strained organic film growth on graphene demonstrates the possibility to tune molecular packing via graphene-molecule interactions. Graphene can induce the growth of a rarely-observed pentacene polymorph through graphene-molecule interaction.

UR - http://www.scopus.com/inward/record.url?scp=85027937433&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85027937433&partnerID=8YFLogxK

U2 - 10.1002/smll.201403006

DO - 10.1002/smll.201403006

M3 - Article

VL - 11

SP - 2037

EP - 2043

JO - Small

JF - Small

SN - 1613-6810

IS - 17

ER -