Vertically standing layered MoS2nanosheets on TiO2nanofibers for enhanced nonlinear optical property.
Vertical layered MoS2nanosheets rooting into TiO2nanofibers were successfully prepared by a facile two-step method: prefabrication of porous TiO2nanofibers based on an electrospinning technique, and assembly of MoS2ultrathin nanosheets through a simple hydrothermal reaction. Significant enhancement of nonlinear optical response of the MoS2/TiO2nanocomposite was confirmed by an open-aperture z-scan measurement. The nanocomposite displayed strong optical limiting (OL) effects to ultrafast laser pulses with a low OL threshold of ~22.3 mJ/cm2, which is lower than that of pristine TiO2nanofibers and MoS2nanosheets. In addition to the contribution of the strong nonlinear absorption of MoS2nanosheets and TiO2nanofibers, such phenomenon is also attributed to the unique structure of vertically standing layered MoS2nanosheets on TiO2nanofibers with a large amount of exposed edge states, large surface areas and fast electron transfer between TiO2and MoS2. This work broadens our vision to engineering novel hierarchical MoS2-based nanocomposite for efficiently enhanced nonlinear light-matter interaction.
Rongfei
R
Wei
Xiangling
X
Tian
Zhongliang
Z
Hu
Hang
H
Zhang
Tian
T
Qiao
Xin
X
He
Qiuqun
Q
Chen
Zhi
Z
Chen
Jianrong
J
Qiu