Nanomotors Driven by Light

  • Author: ChemistryViews.org
  • Published: 14 May 2016
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Source / Publisher: Journal of the American Chemical Society/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Nanomotors Driven by Light

Nanomotors are usually propelled chemically, for example by producing a gas, and can transport cargoes such as drugs. It has been difficult to produce "fuel-free" nanoparticles (propelled by physical means such as electric fields, sound waves, or light), which can be used to transport and release a chemical cargo.


Tieyan Si, Qiang He, Harbin Institute of Technology, China, and colleagues have developed two-faced gold-coated mesoporous silica nanoparticle motors which are driven by near-infrared (NIR) light. The team first synthesized mesoporous silica nanoparticles with sizes of 50–120 nm using a sol-gel process. The particles were spread on a silicon slide in a monolayer and then coated with gold on one side by vacuum sputter deposition.


The resulting two-faced "Janus" nanomotors were suspended in water. They moved rapidly when irradiated with near-infrared light. This is due to the surface plasmon resonance of the gold shells, which generates heat on one side of the particles. The nanomotors reached speeds of 8.1–17.8 μm/s depending on their size, which corresponds to 68–356 body lengths per second. The particles are biocompatible and the mesoporous silica structure has potential for cargo transport.


 

Article Views: 1212

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH