TY - JOUR
T1 - A Versatile Approach to Create Nanobubbles on Arbitrary Two-Dimensional Materials for Imaging Exciton Localization
AU - Chen, Yulong
AU - Song, Penghui
AU - Wang, Chen
AU - Zhang, Miao
AU - Hu, Kaiming
AU - Tian, Ziao
AU - Su, Weitao
AU - Chu, Paul K.
AU - Zhang, Wenming
AU - Di, Zengfeng
PY - 2022/10/21
Y1 - 2022/10/21
N2 - Strained 2D materials with lattice deformation have the optimal band structure, lattice vibration, and thermal conductivity and various methods have been proposed to introduce strain into 2D materials. However, the creation of localized strain in arbitrary 2D materials in predesigned areas is difficult and challenging. Herein, a versatile approach to creating on-demand nanobubbles on five different 2D materials using a functional atomic force microscopy (AFM) tip is described. Strain-induced redshifts are observed from the Raman scattering and photoluminescence (PL) spectra of the 2D materials in the region with the nanobubble arrays. In addition, the localized exciton state is observed from the periphery of a steep WS2 nanobubble by high-resolution nano-photoluminescence and is supported by theoretical simulation. These results demonstrate a programmable and reliable method to create localized strain in different 2D materials and pave the way for nanoscale strain engineering of 2D materials to cater to different applications.
AB - Strained 2D materials with lattice deformation have the optimal band structure, lattice vibration, and thermal conductivity and various methods have been proposed to introduce strain into 2D materials. However, the creation of localized strain in arbitrary 2D materials in predesigned areas is difficult and challenging. Herein, a versatile approach to creating on-demand nanobubbles on five different 2D materials using a functional atomic force microscopy (AFM) tip is described. Strain-induced redshifts are observed from the Raman scattering and photoluminescence (PL) spectra of the 2D materials in the region with the nanobubble arrays. In addition, the localized exciton state is observed from the periphery of a steep WS2 nanobubble by high-resolution nano-photoluminescence and is supported by theoretical simulation. These results demonstrate a programmable and reliable method to create localized strain in different 2D materials and pave the way for nanoscale strain engineering of 2D materials to cater to different applications.
KW - 2D materials
KW - atomic force microscopy
KW - localized strain
KW - nanobubbles
KW - tip-enhanced photoluminescence
UR - http://www.scopus.com/inward/record.url?scp=85137940780&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85137940780&origin=recordpage
U2 - 10.1002/admi.202201079
DO - 10.1002/admi.202201079
M3 - RGC 21 - Publication in refereed journal
SN - 2196-7350
VL - 9
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
IS - 30
M1 - 2201079
ER -