Journal
CHEM
Volume 6, Issue 2, Pages 448-459Publisher
CELL PRESS
DOI: 10.1016/j.chempr.2019.11.004
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Funding
- National Natural Science Foundation of China (NSFC)
- National Key Research and Development project [2016YFF0204402]
- Program for Changjiang Scholars and Innovative Research Team in the university [IRT1205]
- Fundamental Research Funds for the Central Universities
- Ministry of Finance
- Ministry of Education of PRC
- Royal Society
- Newton Fund through the Newton Advanced Fellowship award [NAF\R1\191294]
- U.S. Department of Energy
- Office of Vehicle Technologies through the Advanced Battery Material Research (BMR) program [DE-SC0012704]
- Assistant Secretary for Energy Efficiency and Renewable Energy
- DOE Office of Science [DE-SC0012704]
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The high reductivity of aluminum (Al) implies the utmost difficulty in achieving oxygen-resistant, ultrathin Al nanostructures. Herein, we demonstrate that sub-2-nm-thick Al nanosheets with ambient stability can be synthesized through a facile wet-chemical approach. Selective oxygen adsorption on the (111) facets of the face-centered cubic (fcc) Al has been revealed as the reason of controlling the morphology and stability of Al nanosheets, tailoring the thickness from 18 nm to 1.5 nm. Within the (111) surface passivation, Al nanosheets have achieved satisfactory stability, ensuring the possibility to study thickness-dependent localized surface plasmon resonance from visible to near-infrared (near-IR) region, and significantly enhanced two-photon luminescence. This work demonstrates, for the first time, the feasibility in obtaining stable ultrathin nanostructures of Al metal, which paves the way toward optical applications of Al as a sustainable plasmonic material, and shows great potential in the synthesis of other active metal-based nanomaterials.
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