Supporting information:
This page contains materials referenced by our publications.
“Schooling Behavior of Light-Powered Autonomous Micromotors in Water”
Michael Ibele, Thomas E. Mallouk, and Ayusman Sen
Angew. Chem. 2009, 48 (18), 3308-3312, DOI: 10.1002/anie.200804704
Supplemental Video:
Schooling behavior of UV-illuminated silver chloride colloids. Silver chloride particles approximately 2 μm in size are filmed in deionized water. At 2 seconds into the film they are exposed to UV light and begin to move. At longer times large schools of particles develop. Viewing window is 195 μm across. Videos play in real time.
“Schooling Behavior of Light-Powered Autonomous Micromotors in Water”
Michael Ibele, Thomas E. Mallouk, and Ayusman Sen
Angew. Chem. 2009, 48 (18), 3308-3312, DOI: 10.1002/anie.200804704
Supplementary Video:
Assembly of UV-illuminated silver chloride and amidine spheres to form Janus motors. Silver chloride colloids (darker objects) are mixed with amidine coated polystyrene spheres (translucent objects) in deionized water and are illuminated with UV light. The ions produced by the silver chloride decomposition attract in the amidine spheres, where they electrostatically attach to the silver chloride. The addition of the inert amidine sphere makes the silver chloride significantly more asymmetric, and thus the previously random motion of the silver chloride becomes more directed. Viewing window is 195 μm across. Videos play in real time.
“Schooling Behavior of Light-Powered Autonomous Micromotors in Water”
Michael Ibele, Thomas E. Mallouk, and Ayusman Sen
Angew. Chem. 2009, 48 (18), 3308-3312, DOI: 10.1002/anie.200804704
Supplementary Video:
“Predator-prey” behavior of silica spheres towards UV-illuminated silver chloride. Silver chloride colloids (darker objects) are mixed with 2 μm silica spheres (translucent objects) in deionized water. UV-Illumination commences three seconds into the film, and the silver chloride begins to move The inert silica spheres are then seen to seek out and surround the mobile silver chloride particles in much the same way a neutrophil seeks out bacteria.
“Schooling Behavior of Light-Powered Autonomous Micromotors in Water”
Michael Ibele, Thomas E. Mallouk, and Ayusman Sen
Angew. Chem. 2009, 48 (18), 3308-3312, DOI: 10.1002/anie.200804704
Supplementary Video:
Reversible schooling by silver chloride colloids previously exposed to UV-light. Silver chloride colloids in deionized water which have been previously exposed to UV light undergo a strange phenomenon when the UV light is removed (leaving only visible wavelength illumination). Previously collected schools will condense further to form tighter schools. If the UV light is turned back on, the schools will expand back to their original sizes. This phenomenon is not completely understood and does not occur for fresh silver chloride colliods which have never been exposed to UV light. As the movie begins the UV light is off. It is turned on again at 5 seconds, 24 seconds, and 47 seconds, and off at 13 seconds, 30 seconds, and 52 seconds. Viewing window is 195 μm across. Videos play in real time.
“Chemotaxis of Non-Biological Nanorods”
Yiying Hong, Nicole M. K. Blackman, Nathaniel D. Kopp, Ayusman Sen, and Darrell Velegol
Phys. Rev. Lett. 2007, 99, 178103. DOI: 10.1103/PhysRevLett.99.178103
Supplementary Video:
Chemotaxis of PtAu rods. PtAu rods move toward the 30% H2O2 soaked hydrogel (top left corner) at 0.7 hour of experiment. Movie was taken by transmission microscope at bright field at 50 times magnification and 30 times the real speed.
“Catalytic Nanomotors: Remote-Controlled Autonomous Movement of Striped Metallic Nanorods”
Timothy R. Kline, Walter F. Paxton, Thomas E. Mallouk, and Ayusman Sen
Angew. Chem., Int. Ed. 2005, 44, 744, DOI: 10.1002/anie.200461890
Referee Video:
Real-time remote steering of striped metallic rods in a 5% hydrogen peroxide solution.
“Catalytic Nanomotors: Remote-Controlled Autonomous Movement of Striped Metallic Nanorods”
Timothy R. Kline, Walter F. Paxton, Thomas E. Mallouk, and Ayusman Sen
Angew. Chem., Int. Ed. 2005, 44, 744, DOI: 10.1002/anie.200461890
Video:
Real-time remote-controlled 2 μm magnetic metallic nanorods in a 2.5% hydrogen peroxide solution that are steered by magnetic field which is turned off toward the end of the movie.
“Directed Rotational Motion of Microscale Objects Using Interfacial Tension Gradients”
Jeffrey Catchmark, Shyamala Subramanian, and Ayusman Sen
Small 2005, 1, 202, DOI: 10.1002/smll.200400061
Video:
Real-time rotational movement of a 100 μm diameter free gear with platinum catalysts on the gear teeth in a 1% hydrogen peroxide solution.
“Catalytic Nanomotors: Autonomous Movement of Striped Nanorods”
Walter F. Paxton, Kevin C. Kistler, Christine C. Olmeda, Ayusman Sen, Sarah K. St. Angelo, Yanyan Cao, Thomas E. Mallouk, Pau; E. Lammert, and Vincent H. Crespi
J. Am. Chem. Soc. 2004, 126, 13424, 10.1021/ja047697z
Video 1:
Real-time Brownian movement of 2 μm platinum/gold rods in pure water.
“Catalytic Nanomotors: Autonomous Movement of Striped Nanorods”
Walter F. Paxton, Kevin C. Kistler, Christine C. Olmeda, Ayusman Sen, Sarah K. St. Angelo, Yanyan Cao, Thomas E. Mallouk, Pau; E. Lammert, and Vincent H. Crespi
J. Am. Chem. Soc. 2004, 126, 13424, 10.1021/ja047697z
Video 2:
Real-time non-Brownian movement of 2 μm platinum/gold rods in a 2.5% hydrogen peroxide solution.