Correction: Collective motion of chiral Brownian particles controlled by a circularly-polarized laser beam

Abstract

Correction for ‘Collective motion of chiral Brownian particles controlled by a circularly-polarized laser beam’ by Raúl Josué Hernández et al., Soft Matter, 2020, 16, 7704–7714, DOI: 10.1039/C9SM02404B.

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The authors regret that the rotation sense of the [script L]-type and [scr R, script letter R]-type particles has been reversed in the video, figures and text, due to an artefact introduced by the video processing. Therefore, they would like to correct the following errors:

• At the beginning of Section 3, the sentence “When three [script L]-type particles are illuminated with LCP light, they exhibit an intermittent counterclockwise (ccw) circular motion…” should instead read as follows: “When three [script L]-type particles are illuminated with LCP light, they exhibit an intermittent clockwise (cw) circular motion…”

• On page 7706, right column, line 10, the sentence “while RCP light now induces a collective vortex rotation in the cw sense…” should instead read as follows: “while RCP light now induces a collective vortex rotation in the ccw sense…”

• In the Fig. 3 caption, the sentence “…counterclockwise rotation (ccw)…” should instead read as follows: “…clockwise rotation (cw)…”

Fig. 3 Three types of chiral particles; each frame shows the last 15 steps in time (Δt = 0.071 s), indicating the position of each particle by color: green (particle 1), red (particle 2) and blue (particle 3). (a)–(c) Image sequence for LCP light at t_a = 10.2 s; t_b = 21.8 s, and t_c = 31.1 s, clockwise rotation (cw) and mean orbital radius r = 1.15 ± 0.18 μm (see Video 1, ESI†). (d)–(f) Mean square displacement graphic for each particle; image sequence for the same particles now illuminated by RCP light at t_d = 10.2 s, t_e = 21.3 s, and t_f = 31.0 s (see Video 2, ESI†). Mean square displacement graphics for each particle with (g) LCP and (h) RCP light and their corresponding mean square angular displacement graphics (i) and (j).

• In the Fig. 4 caption, the sentence “… clockwise rotation (cw)…” should instead read as follows: “…counterclockwise rotation (ccw)…”

Fig. 4 Three R-type chiral particles; each frame shows the last 15 steps in time (Δt = 0.071 s), indicating the position of each particle by color: green (particle 1), red (particle 2) and blue (particle 3). (a)–(c) Image sequence for LCP light at t_a = 10.1 s; t_b = 19.7 s, and t_c = 26.6 s (see Video 3, ESI†). (d)–(f) Mean square displacement graphic for each particle; image sequence for the same particles now illuminated by RCP light at t_d = 10.8 s, t_e = 19.6 s, and t_f = 26.8 s, counterclockwise rotation (ccw) and mean orbital radius r = 1.47 ± 0.28 μm (see Video 4, ESI†). Mean square displacement graphics for each particle with (g) LCP and (h) RCP light and their corresponding mean square angular displacement graphics (i) and (j).

• In the paragraph 3.1 “Angular Momentum”, the sentence “… in agreement with the clockwise (cw) cooperative vortical motion…” should instead read as follows: “…in agreement with the counterclockwise (ccw) cooperative vortical motion…”

• Videos 1–4 in the ESI have been corrected.

Corrections to Fig. 3, 4 and 6 are minimal as shown below:

Fig. 6 Optical torque on a single particle [capital Gamma, Greek, vector]_rad with opposite reflectivities R⁺, R⁻versus ellipticity angle φ. With radius a = 500 nm and pitch p = 330 nm at λ = 488 nm, P = 20 μW and R^± = 0.10.

The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.

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