1. Hydrogen-Bubble-Propelled Zinc-Based Microrockets in Strongly Acidic Media.
- Author
-
Wei Gao, Aysegul Uygun, and Joseph Wang
- Subjects
- *
PROPULSION systems , *MICROTECHNOLOGY , *CHEMICAL templates , *POLYCARBONATES , *HYDROGEN-ion concentration , *ACIDITY - Abstract
Tubular polyaniline (PANI)/Zn micro-rockets are described that display effective autonomous motion in extreme acidic environments, without any additional chemical fuel. These acid-driven hydrogen-bubble-propelled microrockets have been electrosynthesized using the conical polycarbonate template. The effective propulsion in acidic media reflects the continuous thrust of hydrogen bubbles generated by the spontaneous redox reaction occurring at the inner Zn surface. The propulsion characteristics of PANI/Zn microrockets in different acids and in human serum are described. The observed speed-pH dependence holds promise for sensitive pH measurements in extreme acidic environments. The new microrockets display an ultrafast propulsion (as high as 100 body lengths/s) along with attractive capabilities including guided movement and directed cargo transport. Such acid-driven microtubular rockets offer considerable potential for diverse biomedical and industrial applications. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF