Self-assembly of platinum nanoparticles of various size and shape
Title | Self-assembly of platinum nanoparticles of various size and shape |
Publication Type | Journal Article |
Year of Publication | 2001 |
Authors | Petroski, JM, Green, TC, EL-Sayed, MA |
Journal | Journal of Physical Chemistry A |
Volume | 105 |
Pagination | 5542-5547 |
Date Published | Jun |
ISBN Number | 1089-5639 |
Accession Number | WOS:000169371200005 |
Abstract | The addition of dodecanethiol to a polydisperse platinum colloidal aqueous solution capped with acrylic acid leads to self-assembled monolayers which not only contain various sizes, but also various shapes of nanoparticles. Assembled monolayers arranged in hcp arrays are achieved for mixed shape-samples. In;the case of the assembly of cubic nanoparticles, cubic closest packing is achieved when the size difference between the nanoparticles is less than 25% (or between 6 and 8 nm). The ccp array is disrupted when the size difference is between 25 and 60% or there is a mixture of shapes. Finally, size segregation is seen in regions where the size difference is more than 60% with the resultant assembly being hcp no matter what the shape. |
DOI | 10.1021/jp0019207 |