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Laser Strain Engineering

Laser Strain Engineering

Laser Strain Engineering

Straining nanomaterials to break their lattice symmetry is perhaps the most efficient approach toward realizing bandgap tunability.  A modulated inhomogeneous local asymmetric elastic–plastic straining is reported that utilizes GPalevel laser shocking at a high strain rate (dε/dt) ≈ 106–107 s−1, with excellent formability, inducing tunable bandgaps in graphene, and nanoscale electro-optical property changes in many 2D materials and their heterostructures. 


  1. M. Motlag, P. Kumar, Y. Hu, S. Jin, J. Li, J. Shao, X. Yi, Y.H. Lin, J. Walrath, L. Tong, X. Huang, R.S. Goldman, L. Ye, G.J. Cheng, “Asymmetric 3D elastic-plastic strain-modulated electron energy structure in monolayer graphene by laser shocking” , Advanced Materials, (2019),
  2. Y Wang, S Yao, P Liao, S Jin, Q Wang, MJ Kim, GJ Cheng, W Wu, “Strain-engineered anisotropic optical and electrical properties in two-dimensional chiral-chain tellurium", Advanced Materials, (2020),
  3. T. K. Sahu, M. Motlag, A. Bandyopadhyay, G.J. Cheng, P. Kumar, "2+δ dimensional materials via Atomistic Z-welding", Advanced Science, (2022).
  4. Y. Hu, F. Zhang, M. Titze, B. Deng, H. Li, and G.J. Cheng, “Straining effects in MoS2 monolayer on nanostructured substrates: temperature-dependent photoluminescence and exciton dynamics”, Nanoscale, 10(12), (2018), DOI: 10.1039/C8NR00332G
  5. Maithilee Motlag, Yaowu Hu, Lei Tong, Xinyu Huang, Lei Ye, Gary J. Cheng, “Laser shocking induced nanoscale kink-bands in WSe2 2D crystals”, ACS Nano, (2019).
  6. Hu, Y; Li, J; Tian, J; Xuan, Y; Deng, B; Lim DT; McNear, K; Chen, Y; Yang, C; Cheng, GJ, "Parallel nanoshaping of brittle semiconductor nanowires for strained electronics", Nano Letters, (2016).DOI: 10.1021/acs.nanolett.6b03366
  7. J Li, TF Chung, YP Chen, GJ Cheng, “Nanoscale Strainability of Graphene by Laser Shock Induced 3D Shaping", Nano Letters, (2012) Doi:10.1021/nl301817t.
  8. P Kumar, M Motlag, J Liu, Y Hu, L Ye, J Irudayaraj, GJ Cheng, "Laser shock tuning dynamic interlayer coupling in graphene moiré superlattices", Nano Letters, (2018), DOI: 10.1021/acs.nanolett.8b03895.
  9. Chunpeng Song, Huanrui Yang, Feng Liu, Gary J. Cheng, "Quantum Dots enabled Perovskite Thin Film with Enhanced Crystallization, Stability, Carrier diffusion via Pulsed Laser Nanoengineering", Advanced Materials Interfaces, (2020).DOI: 10.1002/admi.202001021.
  10. Yixiu Wang, Shengyu Jin, Qingxiao Wang, Min Wu, Shukai Yao, Peilin Liao, Moon J. Kim, Gary J. Cheng, Wenzhuo Wu, "Parallel nanoimprint forming of one-dimensional chiral semiconductor for strain-engineered optical properties",  Nano-Micro Letters, (2020). DOI : 10.1007/s40820-020-00493-3

  11.  Q. Nian, L. Gao, Y. Hu, B. Deng, J. Tang, G.J. Cheng, "Graphene/PbS-Quantum Dots/Graphene Sandwich Structures Enabled by Laser Shock Imprinting for High Performance Photodetectors", ACS Applied Materials & Interfaces, (2017), 9(51):44715-44723. doi: 10.1021/acsami.7b14468.

  12. DC Branco, GJ Cheng, "A strategy for 2D MXenes as thermal management materials by laser shock Nanoshaping", Journal of Physics: Materials (2023). 

  13. X Huang, L Zhang, L Tong , Z Li, Z Peng, R Lin, K-H Xue, H Dai, H Cheng, DC Branco, J-B Xu, J-B Han, GJ Cheng, X Miao, L Ye, "Manipulating Exchange Bias in 2D Magnetic Heterojunction for High-performance Robust Memory Applications", Nature Communication, 14: 2190 (2023).