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Moving Droplets in 3D Using Light

Journal Article


Abstract


  • The emulation of the complex cellular and bacterial vesicles used to transport materials through fluids has the potential to add revolutionary capabilities to fluidic platforms. Although a number of artificial motile vesicles or microdroplets have been demonstrated previously, control over their movement in liquid in 3D has not been achieved. Here it is shown that by adding a chemical "fuel," a photoactive material, to the droplet, it can be moved in any direction (3D) in water using simple light sources without the need for additives in the water. The droplets can be made up of a range of solvents and move with speeds as high as 10.4 mm s-1toward or away from the irradiation source as a result of a light-induced isothermal change in interfacial tension (Marangoni flow). It is further demonstrated that more complex functions can be accomplished by merging a photoactive droplet with a droplet carrying a "cargo" and moving the new larger droplet to a "reactor" droplet where the cargo undergoes a chemical reaction. The control and versatility of this light-activated, motile droplet system will open up new possibilities for fluidic chemical transport and applications.

Authors


  •   Xiao, Yang (external author)
  •   Zarghami, Sara (external author)
  •   Wagner, Klaudia K.
  •   Wagner, Pawel
  •   Gordon, Keith C. (external author)
  •   Florea, Larisa (external author)
  •   Diamond, Dermot (external author)
  •   Officer, David L.

Publication Date


  • 2018

Citation


  • Xiao, Y., Zarghami, S., Wagner, K., Wagner, P., Gordon, K. C., Florea, L., Diamond, D. & Officer, D. L. (2018). Moving Droplets in 3D Using Light. Advanced Materials, 30 (35), 1801821-1-1801821-8.

Scopus Eid


  • 2-s2.0-85050411452

Start Page


  • 1801821-1

End Page


  • 1801821-8

Volume


  • 30

Issue


  • 35

Place Of Publication


  • Germany

Abstract


  • The emulation of the complex cellular and bacterial vesicles used to transport materials through fluids has the potential to add revolutionary capabilities to fluidic platforms. Although a number of artificial motile vesicles or microdroplets have been demonstrated previously, control over their movement in liquid in 3D has not been achieved. Here it is shown that by adding a chemical "fuel," a photoactive material, to the droplet, it can be moved in any direction (3D) in water using simple light sources without the need for additives in the water. The droplets can be made up of a range of solvents and move with speeds as high as 10.4 mm s-1toward or away from the irradiation source as a result of a light-induced isothermal change in interfacial tension (Marangoni flow). It is further demonstrated that more complex functions can be accomplished by merging a photoactive droplet with a droplet carrying a "cargo" and moving the new larger droplet to a "reactor" droplet where the cargo undergoes a chemical reaction. The control and versatility of this light-activated, motile droplet system will open up new possibilities for fluidic chemical transport and applications.

Authors


  •   Xiao, Yang (external author)
  •   Zarghami, Sara (external author)
  •   Wagner, Klaudia K.
  •   Wagner, Pawel
  •   Gordon, Keith C. (external author)
  •   Florea, Larisa (external author)
  •   Diamond, Dermot (external author)
  •   Officer, David L.

Publication Date


  • 2018

Citation


  • Xiao, Y., Zarghami, S., Wagner, K., Wagner, P., Gordon, K. C., Florea, L., Diamond, D. & Officer, D. L. (2018). Moving Droplets in 3D Using Light. Advanced Materials, 30 (35), 1801821-1-1801821-8.

Scopus Eid


  • 2-s2.0-85050411452

Start Page


  • 1801821-1

End Page


  • 1801821-8

Volume


  • 30

Issue


  • 35

Place Of Publication


  • Germany