Enhanced speed of bimetallic nanorod motors by surface roughening

Abstract

The speed of hydrogen peroxide propelled bimetallic nanorods in water is shown to be proportional to the surface area of the catalytic segment of the nanorods.

Hierarchical nanoporous microtubes for high-speed catalytic microengines

“…23,24 Tailoring the motors' geometry is considered to be an especially effective method. For instance, the incorporation of carbon nanotubes within the Pt segments, 25 enhancing the surface roughness of Pt 26 and the assembly of Pt nanoparticles in microtubes 27 have been used to enhance the speeds of self-propelled motors. Despite these remarkable progresses in improving the performance of catalytic motors, their energy-conversion efficiency is significantly lower than those found in natural biosystems.…”

Autonomous movement induced in chemically powered active soft-oxometalates using dithionite as fuel

“…We now explore the current status in the field of micromotors. The movement of synthetic micromotors is controlled by artificial stimuli such as chemical fuel [11][12][13][14][15] , magnetic field [16][17][18] , electric field [19][20][21] , ultrasonic sound 22 or light [23][24][25] . The movement of synthetic micromotors is controlled by artificial stimuli such as chemical fuel [11][12][13][14][15] , magnetic field [16][17][18] , electric field [19][20][21] , ultrasonic sound 22 or light [23][24][25] .…”

“…The first well known synthetic motor 8 . Thus the operation of micromotors is dependent on the source of energy consumption and accordingly they can be classified as bubble propelled 5,[11][12] micromotors, self electrophoretically propelled [13][14][15] micromotors, magnetically driven [16][17][18] micromotors, electrically driven [19][20][21] micromotors, ultrasound propelled 22a,b micromotors and light driven [23][24][25] micromotors. Thus the operation of micromotors is dependent on the source of energy consumption and accordingly they can be classified as bubble propelled 5,[11][12] micromotors, self electrophoretically propelled [13][14][15] micromotors, magnetically driven [16][17][18] micromotors, electrically driven [19][20][21] micromotors, ultrasound propelled 22a,b micromotors and light driven [23][24][25] micromotors.…”

Simplified Cost‐Effective Preparation of High‐Performance Ag–Pt Nanowire Motors

“…[13] The dissolution and/or redeposition of Ag on the nanomotors can lead to microporosity and surface roughness, that increase the surface area and enhance the rate of the fuel redox reaction. [14] Other factors, such as chemical gradient or bubble formation may also contribute to such unusual behavior.…”