Improving the engine power of a catalytic Janus-sphere micromotor by roughening its surface. Longbottom, B., W. & Bon, S., A., F. ChemRxiv, 2017.
Improving the engine power of a catalytic Janus-sphere micromotor by roughening its surface [link]Website  doi  abstract   bibtex   1 download  
Microspheres with catalytic caps have become a popular model system for studying self- propelled colloids. Existing experimental studies involve predominantly “smooth” particle surfaces. In this study we determine the effect of irregular surface deformations on the propulsive mechanism with a particular focus on speed. The particle surfaces were deformed prior to depositing a catalytic layer which resulted in the formation of nanoscopic pillars of catalyst. These features were shown to boost speed (~2×) when the underlying surface deformations are small (nanoscale), whilst large deformations afforded little difference despite a substantial apparent catalytic surface area. Colloids with deformed surfaces were more likely to display a mixture of rotational and translational propulsion than their “smooth” counterparts.
@article{
 title = {Improving the engine power of a catalytic Janus-sphere micromotor by roughening its surface},
 type = {article},
 year = {2017},
 websites = {http://dx.doi.org/10.26434/chemrxiv.5702659.v1},
 id = {9b035426-ae93-3a48-9f90-fc0b4b4ff7b1},
 created = {2024-01-02T14:09:32.149Z},
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 abstract = {Microspheres with catalytic caps have become a popular model system for studying self- propelled colloids. Existing experimental studies involve predominantly “smooth” particle surfaces. In this study we determine the effect of irregular surface deformations on the propulsive mechanism with a particular focus on speed. The particle surfaces were deformed prior to depositing a catalytic layer which resulted in the formation of nanoscopic pillars of catalyst. These features were shown to boost speed (~2×) when the underlying surface deformations are small (nanoscale), whilst large deformations afforded little difference despite a substantial apparent catalytic surface area. Colloids with deformed surfaces were more likely to display a mixture of rotational and translational propulsion than their “smooth” counterparts.},
 bibtype = {article},
 author = {Longbottom, Brooke W and Bon, Stefan A F},
 doi = {10.26434/chemrxiv.5702659.v1},
 journal = {ChemRxiv}
}
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