Tuning Optical Limiting of Heterosized AuNPs and Fullerene by Countable Electrochemical Assembly

Jia Du; Yiming Lu; Jian Zhang; Jinxin Wang; Yanfang Wang; Mao Li; Qidai Chen

doi:10.1021/acsomega.8b02022

Tuning Optical Limiting of Heterosized AuNPs and Fullerene by Countable Electrochemical Assembly

ACS Omega. 2018 Oct 3;3(10):12495-12500. doi: 10.1021/acsomega.8b02022. eCollection 2018 Oct 31.

Authors

Jia Du^{1

2}, Yiming Lu³, Jian Zhang¹, Jinxin Wang¹, Yanfang Wang¹, Mao Li¹, Qidai Chen³

Affiliations

¹ State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
² University of the Chinese Academy of Science, Beijing 100864, China.
³ State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.

Abstract

Tuning optical limiting was achieved based on the nanostructural and synergistic effects of heterosized gold nanoparticles and fullerene on electrochemical assembly. In particular, with thicknesses of 200, 1, and 10 nm, heterosized AuNP multilayers with periodical pairs of layers present a superior threshold of 0.59 J cm^-2 to monosized AuNP films with the values of 0.89-2.55 J cm^-2, which was further significantly enhanced by the introduction of C₇₀ with a significant threshold drop from 0.43 to 0.13 J cm^-2, indicating that the reverse saturable absorption of C₇₀ had a key contribution compared to the free carrier absorption of AuNPs. This paper not only demonstrates that the hybrid engineering of heterosized AuNPs into an identical film is an effective way to enhance the optical limiting but also indicates that the reverse saturable absorption of C₇₀ is superior to free carrier absorption of AuNPs in optical limiting in AuNPs and C₇₀ hybrid films.