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Synthesis and properties of stable sub-2-nm-thick aluminum nanosheets: Oxygen passivation and two-photon luminescence

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journal contribution
posted on 17.12.2019, 09:16 by Liang Luo, Yang Li, Xiong Sun, Jing Li, Enyuan Hu, Yinglan Liu, Yang Tian, Xiao-Qing Yang, Yaping Li, Wen-Feng LinWen-Feng Lin, Yun Kuang, Wen Liu, Xiaoming Sun

The high reductivity of aluminum 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 down to 1.5 nm. Within the (111) surface passivation, Al nanosheets have achieved satisfactory stability which ensures the possibility to study thickness-dependent localized surface plasmon resonance from visible to the 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 application of Al as a sustainable plasmonic material; it also shows the great potential of the controllable synthesis for investigation of other active metal- based nanomaterials.


Funding

National Natural Science Foundation of China (NSFC), the National Key Research and Development Project (2016YFF0204402)

Program for Changjiang Scholars and Innovative Research Team in the University (IRT1205)

Newton Advanced Fellowship award (NAF\R1\191294)

Office of Vehicle Technologies through Advanced Battery Material Research (BMR) program under Contract No. DE-SC0012704

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Chem

Volume

6

Issue

2

Pages

448 - 459

Publisher

Elsevier BV

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier Inc.

Publisher statement

This paper was accepted for publication in the journal Chem and the definitive published version is available at https://doi.org/10.1016/j.chempr.2019.11.004

Acceptance date

08/11/2019

Publication date

2019-12-09

Copyright date

2019

ISSN

2451-9294

Language

en

Depositor

Prof Wen Feng Lin Deposit date: 16 December 2019