Gold Dispersion and Activation on the Basal Plane of Single-Layer MoS2
Type
ArticleAuthors
Merida, Cindy S.Le, Duy
Echeverría, Elena M.
Nguyen, Ariana E.
Rawal, Takat B
Naghibi Alvillar, Sahar
Kandyba, Viktor
Al-Mahboob, Abdullah
Losovyj, Yaroslav B.
Katsiev, Khabiboulakh
Valentin, Michael D.
Huang, Chun-Yu
Gomez, Michael J.
Lu, I-Hsi
Guan, Alison
Barinov, Alexei
Rahman, Talat S
Dowben, Peter A.
Bartels, Ludwig
Date
2017-12-28Online Publication Date
2017-12-28Print Publication Date
2018-01-11Permanent link to this record
http://hdl.handle.net/10754/626374
Metadata
Show full item recordAbstract
Gold islands are typically associated with high binding affinity to adsorbates and catalytic activity. Here we present the growth of such dispersed nanoscale gold islands on single layer MoS2, prepared on an inert SiO2/Si support by chemical vapor deposition (CVD). This study offers a combination of growth process development, optical characterization, photoelectron spectroscopy at sub-micron 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. As a consequence, 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.Citation
Merida CS, Le D, Echeverría EM, Nguyen AE, Rawal TB, et al. (2017) Gold Dispersion and Activation on the Basal Plane of Single-Layer MoS2. The Journal of Physical Chemistry C. Available: http://dx.doi.org/10.1021/acs.jpcc.7b07632.Sponsors
We gratefully acknowledge joint funding from DOE grant DE-FG02-07ER15842 (UCF, UCR, UNL). DFT calculations were performed using resource from the National Energy Research Scientific Computing Center (NERSC, project 1996) and the Advanced Research Computing Center at UCF. Synchrotron resources were provided by Elettra. A.E.N as well as C.S.N, S.N.A. and A.G. gratefully acknowledges fellowship support through the National Science Foundation of the United States of America via grants DGE 1326120 and DMR 1359136, respectively.Publisher
American Chemical Society (ACS)Additional Links
http://pubs.acs.org/doi/10.1021/acs.jpcc.7b07632ae974a485f413a2113503eed53cd6c53
10.1021/acs.jpcc.7b07632