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Characterization on Three‐Dimensional Trajectory of Disk‐Like Gold‐Nickel‐Platinum Nanomotor Using Digital Holographic Imaging
Author(s) -
Hu Liangxing,
Rehman Shakil,
Tao Kai,
Miao Jianmin
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201801534
Subject(s) - platinum , materials science , nickel , holography , bubble , layer (electronics) , liquid metal , catalysis , nanotechnology , composite material , optics , metallurgy , chemistry , physics , mechanics , biochemistry
Self‐propelling disk‐like nanomotor consisting of three metallic segments: a non‐catalytic gold (Au), central magnetic nickel (Ni), and a catalytic platinum (Pt), is designed and fabricated with a high‐efficiency layer‐by‐layer (LbL) deposition method based on the nano‐electro‐mechanical systems (NMES) technology. A bubble propulsion mechanism, resulting from bubble growth and collapse, is proposed to explain the locomotion of the nanomotor suspended in hydrogen peroxide (H 2 O 2 ) solution. The autonomous propulsion of Au‐Ni‐Pt nanomotor is characterized by digital holographic imaging and analyzed using Matlab, revealing that oxygen (O 2 ) bubbles are generated and detached from the surface of Pt. In addition, the holographic images are for the first time used to reconstruct the instantaneously three‐dimensional (3D) location and trajectory of the nanomotor.