Iridium-catalyst-based autonomous bubble-propelled graphene micromotors with ultralow catalyst loading
A novel concept of an iridium-based bubble-propelled Janus-particle-type graphene micromotor with very high surface area and with very low catalyst loading is described. The low loading of Ir catalyst (0.54 at %) allows for fast motion of graphene microparticles with high surface area of 316.2 m2 g−...
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sg-ntu-dr.10356-1036042020-03-07T12:34:57Z Iridium-catalyst-based autonomous bubble-propelled graphene micromotors with ultralow catalyst loading Wang, Hong Sofer, Zdeněk Eng, Alex Yong Sheng Pumera, Martin School of Physical and Mathematical Sciences DRNTU::Science::Physics::Atomic physics::Solid state physics A novel concept of an iridium-based bubble-propelled Janus-particle-type graphene micromotor with very high surface area and with very low catalyst loading is described. The low loading of Ir catalyst (0.54 at %) allows for fast motion of graphene microparticles with high surface area of 316.2 m2 g−1. The micromotor was prepared with a simple and scalable method by thermal exfoliation of iridium-doped graphite oxide precursor composite in hydrogen atmosphere. Oxygen bubbles generated from the decomposition of hydrogen peroxide at the iridium catalytic sites provide robust propulsion thrust for the graphene micromotor. The high surface area and low iridium catalyst loading of the bubble-propelled graphene motors offer great possibilities for dramatically enhanced cargo delivery. 2014-12-26T07:30:24Z 2019-12-06T21:16:09Z 2014-12-26T07:30:24Z 2019-12-06T21:16:09Z 2014 2014 Journal Article Wang, H., Sofer, Z., Eng, A. Y. S., & Pumera, M. (2014). Iridium-catalyst-based autonomous bubble-propelled graphene micromotors with ultralow catalyst loading. Chemistry - A European journal, 20(46), 14946-14950. 0947-6539 https://hdl.handle.net/10356/103604 http://hdl.handle.net/10220/24554 10.1002/chem.201404238 en Chemistry - A European journal © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
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DRNTU::Science::Physics::Atomic physics::Solid state physics Wang, Hong Sofer, Zdeněk Eng, Alex Yong Sheng Pumera, Martin Iridium-catalyst-based autonomous bubble-propelled graphene micromotors with ultralow catalyst loading |
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A novel concept of an iridium-based bubble-propelled Janus-particle-type graphene micromotor with very high surface area and with very low catalyst loading is described. The low loading of Ir catalyst (0.54 at %) allows for fast motion of graphene microparticles with high surface area of 316.2 m2 g−1. The micromotor was prepared with a simple and scalable method by thermal exfoliation of iridium-doped graphite oxide precursor composite in hydrogen atmosphere. Oxygen bubbles generated from the decomposition of hydrogen peroxide at the iridium catalytic sites provide robust propulsion thrust for the graphene micromotor. The high surface area and low iridium catalyst loading of the bubble-propelled graphene motors offer great possibilities for dramatically enhanced cargo delivery. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Wang, Hong Sofer, Zdeněk Eng, Alex Yong Sheng Pumera, Martin |
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Article |
author |
Wang, Hong Sofer, Zdeněk Eng, Alex Yong Sheng Pumera, Martin |
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Wang, Hong |
title |
Iridium-catalyst-based autonomous bubble-propelled graphene micromotors with ultralow catalyst loading |
title_short |
Iridium-catalyst-based autonomous bubble-propelled graphene micromotors with ultralow catalyst loading |
title_full |
Iridium-catalyst-based autonomous bubble-propelled graphene micromotors with ultralow catalyst loading |
title_fullStr |
Iridium-catalyst-based autonomous bubble-propelled graphene micromotors with ultralow catalyst loading |
title_full_unstemmed |
Iridium-catalyst-based autonomous bubble-propelled graphene micromotors with ultralow catalyst loading |
title_sort |
iridium-catalyst-based autonomous bubble-propelled graphene micromotors with ultralow catalyst loading |
publishDate |
2014 |
url |
https://hdl.handle.net/10356/103604 http://hdl.handle.net/10220/24554 |
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1681042125527973888 |