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. 2016 Feb 9;7:10598. doi: 10.1038/ncomms10598

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(a) Contribution from self diffusiophoresis (see Supplementary Note 2 and equation (2) as a function of height h/R and orientation θ for half-covered Janus microswimmer and unequal surface mobilities b_inert/b_cap=0.3. Throughout, white curves correspond to constant values of . Note that, by definition, panel a is the sum of panels b,c, and d. (b), Contribution obtained by using the free space number density of solute distribution c^fs(r) around the particle, i.e., neglecting the influence of the wall on the number density of solute, but including the influence of the wall on the hydrodynamic flow. (c) Contribution obtained by using the free space hydrodynamics stress tensor in the dual Stokes problems employed in the reciprocal theorem, i.e., neglecting the effect of the wall on the hydrodynamics, but including the chemical effect. (d) Contribution due to higher order coupling between the two effects. (e) Contribution to rate of rotation from the bottom-heaviness of the particle. (f) Chemio-osmotic contribution due to the activity-induced phoretic slip at the wall calculated at b_w/b_cap=−0.2.

Inline graphic — (a) Contribution from self diffusiophoresis (see Supplementary Note 2 and equation (2) as a function of height h/R and orientation θ for half-covered Janus microswimmer and unequal surface mobilities b_inert/b_cap=0.3. Throughout, white curves correspond to constant values of . Note that, by definition, panel a is the sum of panels b,c, and d. (b), Contribution obtained by using the free space number density of solute distribution c^fs(r) around the particle, i.e., neglecting the influence of the wall on the number density of solute, but including the influence of the wall on the hydrodynamic flow. (c) Contribution obtained by using the free space hydrodynamics stress tensor in the dual Stokes problems employed in the reciprocal theorem, i.e., neglecting the effect of the wall on the hydrodynamics, but including the chemical effect. (d) Contribution due to higher order coupling between the two effects. (e) Contribution to rate of rotation from the bottom-heaviness of the particle. (f) Chemio-osmotic contribution due to the activity-induced phoretic slip at the wall calculated at b_w/b_cap=−0.2.