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Light‐Driven Crawling of Molecular Crystals by Phase‐Dependent Transient Elastic Lattice Deformation
Author(s) -
Gong Yanjun,
Guo Yongxian,
Ge Fayuan,
Xiong Wei,
Su Jie,
Sun Yang,
Zhang Chuang,
Cao AnMin,
Zhang Yifan,
Zhao Jincai,
Che Yanke
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202000570
Subject(s) - materials science , lattice (music) , deformation (meteorology) , laser , elastic modulus , molecular dynamics , crystal (programming language) , crystal structure , phase (matter) , optics , molecular physics , crystallography , condensed matter physics , chemistry , composite material , physics , computational chemistry , computer science , acoustics , programming language , organic chemistry
The light‐driven crawling of a molecular crystal that can form three phases, (α, β, and γ) is presented. Laser irradiation of the molecular crystal can generate phase‐dependent transient elastic lattice deformation. The resulting elastic lattice deformation that follows scanning irradiation of a laser can actuate the different phases of molecular crystal to move with different velocity and direction. Because the γ phase has a large Young's modulus (ca. 26 GPa), a force of 0.1 μN can be generated under one laser spot. The generated force is sufficient to actuate the γ‐formed molecular crystals in a wide dimensional range to move longitudinally at a velocity of about 60 μm min −1 , which is two orders of magnitude faster than the α and β phases.