title: Transient Micromotors That Disappear When No Longer Needed.
abstract: Transient self-destroyed micromotors that autonomously disappear in biological media at controlled rates upon completing their task, without leaving a toxic residue, are presented. The propulsion and degradation characteristics of the self-destroyed Mg/ZnO, Mg/Si, and Zn/Fe Janus micromotors and single-component Zn micromotors are described. The degradation of the Janus micromotors relies on the different corrosion rates of their core-shell components. Inductively coupled plasma optical emission spectrometry measurements are used to probe the time-dependent degradation of the different constituents of the micromotors. The toxicity of the transient micromotors is discussed toward their potential use in biomedical applications. This concept of transient micromotors offers considerable potential for diverse practical applications in the near future.
authors: Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States.|State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology , Wuhan 430070, People's Republic of China.
authors: Chuanrui
authors: C
authors: Chen
authors: Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States.
authors: Emil
authors: E
authors: Karshalev
authors: Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States.
authors: Jinxing
authors: J
authors: Li
authors: Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States.
authors: Fernando
authors: F
authors: Soto
authors: Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States.
authors: Roxanne
authors: R
authors: Castillo
authors: Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States.
authors: Isaac
authors: I
authors: Campos
authors: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology , Wuhan 430070, People's Republic of China.
authors: Fangzhi
authors: F
authors: Mou
authors: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology , Wuhan 430070, People's Republic of China.
authors: Jianguo
authors: J
authors: Guan
authors: Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States.
authors: Joseph
authors: J
authors: Wang
keywords: biocompatible; controlled degradation; micromotor; transient