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Nanoscale. 2017 Mar 23;9(12):4175-4182. doi: 10.1039/c7nr00711f.

Angle resolved vibrational properties of anisotropic transition metal trichalcogenide nanosheets.

Nanoscale

Wilson Kong, Cihan Bacaksiz, Bin Chen, Kedi Wu, Mark Blei, Xi Fan, Yuxia Shen, Hasan Sahin, David Wright, Deepa S Narang, Sefaattin Tongay

Affiliations

  1. School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, USA. [email protected].
  2. Department of Physics, Izmir Institute of Technology, 35430 Izmir, Turkey.
  3. Department of Photonics, Izmir Institute of Technology, 35430 Izmir, Turkey.
  4. LeRoy Eyring Center for Solid State Science, Arizona State University, Tempe, Arizona 85287, USA.
  5. Department of Physics, Alliance College of Engineering and Design (ACED), Alliance University, Chandapura, Anekal, Bangalore, 562106 Karnataka, India.

PMID: 28282099 DOI: 10.1039/c7nr00711f

Abstract

Layered transition metal trichalcogenides (TMTCs) are a new class of anisotropic two-dimensional materials that exhibit quasi-1D behavior. This property stems from their unique highly anisotropic crystal structure where vastly different material properties can be attained from different crystal directions. Here, we employ density functional theory predictions, atomic force microscopy, and angle-resolved Raman spectroscopy to investigate their fundamental vibrational properties which differ significantly from other 2D systems and to establish a method in identifying anisotropy direction of different types of TMTCs. We find that the intensity of certain Raman peaks of TiS

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