Self-Moving Catalytic Nanomotors
Final rept. 15 Sep 2010-14 Sep 2013
PENNSYLVANIA STATE UNIV STATE COLLEGE DEPT OF CHEMISTRY
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Work performed during the 3-year grant period includes the following a The design of an efficient, bubble-free, nanoscale motor consisting of a copper-platinum segmented rod that operates as a nanobattery in dilute aqueous bromine or iodine solutions. b The fabrication of motors driven by both catalytic polymerization and depolymerization reactions. The former were observed to exhibit chemotaxis when placed in a monomer gradient. Scaling down to sub-nm scale, enhanced mobility for single catalyst molecules was also observed during substrate turnover. c The identification of a new mechanism for producing self-generated flows. This involves auto diffusio-osmosis due to the dissolution of a wide variety of minerals. Further, the diffusio-osmotic mechanisms was employed to design proof of principle crack sensing and repair systems, as well as to drive flows in and out of dead-end channels. d The design of a polymeric material that is self-powered, operates as a non-mechanical fluid pump in response to molecular level inputs, and remembers the presence of the signal to which it was exposed, even when the signal is fleeting.
- Physical Chemistry