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Gold Dispersion and Activation on the Basal Plane of Single-Layer MoS2

Journal Article · · Journal of Physical Chemistry. C
 [1];  [2];  [3];  [1];  [2];  [1];  [4];  [4];  [5];  [6];  [1];  [1];  [1];  [1];  [1];  [4];  [2];  [3];  [1]
  1. Univ. of California, Riverside, CA (United States). Dept. of Chemistry, and Materials Science & Engineering Program
  2. Univ. of Central Florida, Orlando, FL (United States). Dept. of Physics
  3. Univ. of Nebraska, Lincoln, NE (United States). Dept. of Physics and Astronomy
  4. Elettra-Sincrotrone Trieste (Italy)
  5. Indiana Univ., Bloomington, IN (United States). Dept. of Chemistry
  6. King Abdullah Univ. of Science and Technology, Thuwal (Saudi Arabia)
+ Show Author Affiliations
Gold islands are typically associated with high binding affinity to adsorbates and catalytic activity. In this paper, we present the growth of dispersed nanoscale gold islands on single layer MoS2, prepared on an inert SiO2/Si support by chemical vapor deposition. This study offers a combination of growth process development, optical characterization, photoelectron spectroscopy at submicron spatial resolution, and advanced density functional theory modeling for detailed insight into the electronic interaction between gold and single-layer MoS2. In particular, we find the gold density of states in Au/MoS2/SiO2/Si to be far less well-defined than Au islands on other 2-dimensional materials such as graphene, for which we also provide data. We attribute this effect to the presence of heterogeneous Au adatom/MoS2-support interactions within the nanometer-scale gold cluster. Theory predicts that CO will exhibit adsorption energies in excess of 1 eV at the Au cluster edges, where the local density of states is dominated by Au 5dz2 symmetry.
Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-07ER15842
OSTI ID:
1483381
Journal Information:
Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 1 Vol. 122; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Functionalized Hybridization of 2D Nanomaterials journal September 2019

Figures / Tables (4)

Figure 1(p. 6)figure Figure 1
Figure 2(p. 13)figure Figure 2
Figure 3(p. 15)figure Figure 3
Figure 4(p. 17)figure Figure 4

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