Dendrimer-encapsulated Pt nanoparticles in supercritical medium : synthesis, characterization, and application to device fabrication
Puniredd, Sreenivasa Reddy
Yin, Chan Mei
Hooi, Yeong Sai
Lee, Pooi See
Srinivasan, M. P.
Date of Issue2009
School of Materials Science and Engineering
In this work we describe a general method for formation of Pt nanoparticles within an ultrathin film matrix and its application for non-volatile memory (NVM). Our approach involves the formation of Pt nanoparticles within ultrathin film matrix formed by covalent layer-by-layer (LbL) assembly of pyromellitic dianhydride (PMDA) and second generation of polyamidoamine (PAMAM) dendrimer in supercritical carbon dioxide (SCCO2). The hyperbranched component in the film structure serves to confine nanoparticle size and improve distribution. The memory effect and retention capability is demonstrated by means of a metal-insulator semiconductor (MIS) device fabricated using the nanoparticle-laden thin film as the insulating layer.
DRNTU::Science::Physics::Nuclear and particle physics
Journal of colloid and interface science
© 2009 Elsevier Inc.