Abstract
Self-propelled miniaturized machines harness the chemical potential of their environment for movement. Locomotion of chemically powered micromotors have been hugely dependent on the surroundings. The use of pH to alter the mobility of micromotors is demonstrated in this work through the manipulation of hydrogen peroxide chemistry in different acidity/alkalinity. The sequential addition of sodium hydroxide to increase the pH of the solution led to a consequent increase in activity of micromotors. Meanwhile, addition of hydrochloric acid compromised the structural integrity of the microstructures, culminating in locomotive changes. Such dramatic changes in activity and velocities of the micromotors allow the usage of this behavior for pH detection. This concept was illustrated with Janus silver micromotors and tubular bimetallic Cu/Pt micromotors. Alteration of pH serves as a useful general strategy for increasing hydrogen peroxide decomposition for enhanced oxygen-bubble propulsion in catalytic micromotors.
| Original language | English |
|---|---|
| Pages (from-to) | 355-360 |
| Number of pages | 6 |
| Journal | Chemistry - A European Journal |
| Volume | 22 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2016 Jan 4 |
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All Science Journal Classification (ASJC) codes
- Catalysis
- Chemistry(all)
- Organic Chemistry
Cite this
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Influence of pH on the Motion of Catalytic Janus Particles and Tubular Bubble-Propelled Micromotors. / Moo, James Guo Sheng; Wang, Hong; Pumera, Martin.
In: Chemistry - A European Journal, Vol. 22, No. 1, 04.01.2016, p. 355-360.Research output: Contribution to journal › Article
TY - JOUR
T1 - Influence of pH on the Motion of Catalytic Janus Particles and Tubular Bubble-Propelled Micromotors
AU - Moo, James Guo Sheng
AU - Wang, Hong
AU - Pumera, Martin
PY - 2016/1/4
Y1 - 2016/1/4
N2 - Self-propelled miniaturized machines harness the chemical potential of their environment for movement. Locomotion of chemically powered micromotors have been hugely dependent on the surroundings. The use of pH to alter the mobility of micromotors is demonstrated in this work through the manipulation of hydrogen peroxide chemistry in different acidity/alkalinity. The sequential addition of sodium hydroxide to increase the pH of the solution led to a consequent increase in activity of micromotors. Meanwhile, addition of hydrochloric acid compromised the structural integrity of the microstructures, culminating in locomotive changes. Such dramatic changes in activity and velocities of the micromotors allow the usage of this behavior for pH detection. This concept was illustrated with Janus silver micromotors and tubular bimetallic Cu/Pt micromotors. Alteration of pH serves as a useful general strategy for increasing hydrogen peroxide decomposition for enhanced oxygen-bubble propulsion in catalytic micromotors.
AB - Self-propelled miniaturized machines harness the chemical potential of their environment for movement. Locomotion of chemically powered micromotors have been hugely dependent on the surroundings. The use of pH to alter the mobility of micromotors is demonstrated in this work through the manipulation of hydrogen peroxide chemistry in different acidity/alkalinity. The sequential addition of sodium hydroxide to increase the pH of the solution led to a consequent increase in activity of micromotors. Meanwhile, addition of hydrochloric acid compromised the structural integrity of the microstructures, culminating in locomotive changes. Such dramatic changes in activity and velocities of the micromotors allow the usage of this behavior for pH detection. This concept was illustrated with Janus silver micromotors and tubular bimetallic Cu/Pt micromotors. Alteration of pH serves as a useful general strategy for increasing hydrogen peroxide decomposition for enhanced oxygen-bubble propulsion in catalytic micromotors.
UR - http://www.scopus.com/inward/record.url?scp=84954361428&partnerID=8YFLogxK
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U2 - 10.1002/chem.201503473
DO - 10.1002/chem.201503473
M3 - Article
AN - SCOPUS:84954361428
VL - 22
SP - 355
EP - 360
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
SN - 0947-6539
IS - 1
ER -