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Park, Noejung
Computational Physics & Electronic Structure Lab
Research Interests
  • Electronic structure calculation, computational physics, computational material science

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Two-dimensional polyaniline (C3N) from carbonized organic single crystals in solid state

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Title
Two-dimensional polyaniline (C3N) from carbonized organic single crystals in solid state
Author
Mahmood, JaveedLee, Eun KwangJung, MinbokShin, DongbinChoi, Hyung-JungSeo, Jeong-MinJung, Sun-MinKim, DongwookLi, FengLah, Myoung SooPark, NoejungShin, Hyung-JoonOh, Joon HakBaek, Jong-Beom
Keywords
polyaniline; two-dimensional; solid-state reaction; C3N; nitrogenated graphene
Issue Date
201607
Publisher
NATL ACAD SCIENCES
Citation
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v.113, no.27, pp.7414 - 7419
Abstract
The formation of 2D polyaniline (PANI) has attracted considerable interest due to its expected electronic and optoelectronic properties. Although PANI was discovered over 150 y ago, obtaining an atomically well-defined 2D PANI framework has been a longstanding challenge. Here, we describe the synthesis of 2D PANI via the direct pyrolysis of hexaaminobenzene trihydrochloride single crystals in solid state. The 2D PANI consists of three phenyl rings sharing six nitrogen atoms, and its structural unit has the empirical formula of C3N. The topological and electronic structures of the 2D PANI were revealed by scanning tunneling microscopy and scanning tunneling spectroscopy combined with a first-principle density functional theory calculation. The electronic properties of pristine 2D PANI films (undoped) showed ambipolar behaviors with a Dirac point of –37 V and an average conductivity of 0.72 S/cm. After doping with hydrochloric acid, the conductivity jumped to 1.41 × 103 S/cm, which is the highest value for doped PANI reported to date. Although the structure of 2D PANI is analogous to graphene, it contains uniformly distributed nitrogen atoms for multifunctionality; hence, we anticipate that 2D PANI has strong potential, from wet chemistry to device applications, beyond linear PANI and other 2D materials.
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DOI
http://dx.doi.org/10.1073/pnas.1605318113
ISSN
0027-8424
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MSE_Journal Papers
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