Dyck Ondrej, Lingerfelt David, Kim Songkil, Jesse Stephen, Kalinin Sergei V
Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States of America.
Nanotechnology. 2020 Mar 27;31(24):245303. doi: 10.1088/1361-6528/ab7ef8. Epub 2020 Mar 11.
We report electron-beam activated motion of a catalytic nanoparticle along a graphene step edge and associated etching of the edge. The catalytic hydrogenation process was observed to be activated by a combination of elevated temperature and electron beam irradiation. Reduction of beam fluence on the particle was sufficient to stop the process, leading to the ability to switch on and off the etching. Such an approach enables the targeting of individual nanoparticles to induce motion and beam-controlled etching of matter through activated electrocatalytic processes. The applications of electron-beam control as a paradigm for molecular-scale robotics are discussed.
我们报告了催化纳米颗粒沿石墨烯台阶边缘的电子束激活运动以及边缘的相关蚀刻。观察到催化氢化过程通过升高温度和电子束辐照的组合被激活。降低颗粒上的束流密度足以停止该过程，从而实现蚀刻的开启和关闭。这种方法能够靶向单个纳米颗粒，通过激活的电催化过程诱导物质的运动和束控蚀刻。讨论了电子束控制作为分子尺度机器人范例的应用。
