BROWSE

Related Researcher

Author's Photo

Ding, Feng
IBS - Center for Multidimensional Carbon Materials (CMCM)
Research Interests
  • Theoretical methods development for materials studies.
  • The formation mechanism of various carbon materials, from fullerene to carbon nanotube and graphene.
  • Kinetics and thermodynamics of materials growth and etching.
  • The structure, properties and fundamentals of nanomaterials.
  • The experimental synthesis of carbon nanotubes.

ITEM VIEW & DOWNLOAD

Two-Dimensional Palladium Diselenide with Strong In-Plane Optical Anisotropy and High Mobility Grown by Chemical Vapor Deposition

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Two-Dimensional Palladium Diselenide with Strong In-Plane Optical Anisotropy and High Mobility Grown by Chemical Vapor Deposition
Author
Gu, YiyiCai, HuiDong, JichenYu, YilingHoffman, Anna N.Liu, ChenzeOyedele, Akinola D.Lin, Yu-ChuanGe, ZhuozhiPuretzky, Alexander A.Duscher, GerdChisholm, Matthew F.Rack, Philip D.Rouleau, Christopher M.Gai, ZhengMeng, XiangminDing, FengGeohegan, David B.Xiao, Kai
Issue Date
2020-05
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED MATERIALS, v.32, no.19, pp.1906238
Abstract
Two-dimensional (2D) palladium diselenide (PdSe2) has strong interlayer coupling and a puckered pentagonal structure, leading to remarkable layer-dependent electronic structures and highly anisotropic in-plane optical and electronic properties. However, the lack of high-quality, 2D PdSe2 crystals grown by bottom-up approaches limits the study of their exotic properties and practical applications. In this work, chemical vapor deposition growth of highly crystalline few-layer (>= 2 layers) PdSe2 crystals on various substrates is reported. The high quality of the PdSe2 crystals is confirmed by low-frequency Raman spectroscopy, scanning transmission electron microscopy, and electrical characterization. In addition, strong in-plane optical anisotropy is demonstrated via polarized Raman spectroscopy and second-harmonic generation maps of the PdSe2 flakes. A theoretical model based on kinetic Wulff construction theory and density functional theory calculations is developed and described the observed evolution of "square-like" shaped PdSe2 crystals into rhombus due to the higher nucleation barriers for stable attachment on the (1,1) and (1,-1) edges, which results in their slower growth rates. Few-layer PdSe2 field-effect transistors reveal tunable ambipolar charge carrier conduction with an electron mobility up to approximate to 294 cm(2) V-1 s(-1), which is comparable to that of exfoliated PdSe2, indicating the promise of this anisotropic 2D material for electronics.
URI
https://scholarworks.unist.ac.kr/handle/201301/48354
URL
https://onlinelibrary.wiley.com/doi/full/10.1002/adma.201906238
DOI
10.1002/adma.201906238
ISSN
0935-9648
Appears in Collections:
MSE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU