Issue 17, 2018

Incorporation of Keplerate-type Mo–O based macroanions into Zn2Al-LDH results in the formation of all-inorganic composite films with remarkable third-order optical nonlinearity

Abstract

Herein, new all-inorganic transparent composite films with the formula (Zn2Al-LDH/{Mo132-Ac})n have been fabricated by a layer-by-layer method using the exfoliated Zn2Al-LDH monolayer nanosheets and Keplerate-type macroanion {Mo132-Ac}. They were characterized by UV-vis absorption spectroscopy, SEM, AFM, and XPS techniques. The Z-scan measurements, which were conducted under laser irradiation at a wavelength of 532 nm, a pulse width of 6 ns, a repetition rate of 10 Hz, and the light intensity at a focus E0 of 10 μJ, revealed that all the films had notable saturated absorption and self-defocusing effect with a large third-order optical nonlinear susceptibility χ(3). With an increase in the number of layers (i.e., n) corresponding to the increase in the thickness of the films, the third-order nonlinear absorption β and refractive effects of the films were improved (i.e., the χ(3) value was up to 1.99 × 10−11 esu when n = 24); this implied that the NLO responses could be modified by fine-tuning the thickness of the composite films to meet the demands of different devices.

Graphical abstract: Incorporation of Keplerate-type Mo–O based macroanions into Zn2Al-LDH results in the formation of all-inorganic composite films with remarkable third-order optical nonlinearity

Supplementary files

Article information

Article type
Paper
Submitted
10 Feb 2018
Accepted
05 Apr 2018
First published
19 Apr 2018

Dalton Trans., 2018,47, 6184-6188

Incorporation of Keplerate-type Mo–O based macroanions into Zn2Al-LDH results in the formation of all-inorganic composite films with remarkable third-order optical nonlinearity

H. Ren, F. K. Shehzad, Y. Zhou, L. Zhang, A. Iqbal and Y. Long, Dalton Trans., 2018, 47, 6184 DOI: 10.1039/C8DT00571K

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