ADVERTISEMENT
2 /3 FREE ARTICLES LEFT THIS MONTH Remaining
Chemistry matters. Join us to get the news you need.

If you have an ACS member number, please enter it here so we can link this account to your membership. (optional)

ACS values your privacy. By submitting your information, you are gaining access to C&EN and subscribing to our weekly newsletter. We use the information you provide to make your reading experience better, and we will never sell your data to third party members.

ENJOY UNLIMITED ACCES TO C&EN

Materials

Nanostructures Form Like Polymers

Novel nanorod self-assembly process resembles step-growth polymerization

by Elizabeth K. Wilson
July 12, 2010 | APPEARED IN VOLUME 88, ISSUE 28

[+]Enlarge
Credit: Science
Gold nanorods with arrowhead-shaped ends string together to form controllable structures.
8828scon.gif
Credit: Science
Gold nanorods with arrowhead-shaped ends string together to form controllable structures.

A new process for nanoparticle self-assembly resembles step-growth polymerization and gives scientists a long-desired strategy for predicting nanostructure properties, such as their architecture and size distribution (Science 2010, 329, 197). Self-assembly is a highly attractive phenomenon because it allows scientists to create structures with numerous potential optical, electronic, and magnetic properties for applications ranging from optoelectronics to sensing. Eugenia Kumacheva of the University of Toronto; Michael Rubinstein of the University of North Carolina, Chapel Hill; and colleagues prepared gold nanorods that have arrowhead-shaped ends. They coated the rod shafts with cetyl trimethyl ammonium bromide bilayers and coated the arrowheads with thiol-terminated polystyrene. The rods self-assemble at the arrowhead ends into “nanopolymers,” with the length and branching of the chains controlled by reaction time and conditions much in the same way molecular polymerization reactions are controlled.

X

Article:

This article has been sent to the following recipient:

Leave A Comment

*Required to comment