Elastic behavior of nanoparticle chain aggregates
作者:
Sheldon K. Friedlander,
Hee Dong Jang,
Kevin H. Ryu,
期刊:
Applied Physics Letters
(AIP Available online 1998)
卷期:
Volume 72,
issue 2
页码: 173-175
ISSN:0003-6951
年代: 1998
DOI:10.1063/1.120676
出版商: AIP
数据来源: AIP
摘要:
Nanoparticle chain aggregates (NCA) possess elastomeric properties including stretch under tension, and contraction when the tension is relaxed. Individual chain aggregates of 7 nm titania particles a few hundred nm long were observed in the electron microscope. The NCA were stretched across expanding holes in the carbon film on an electron micrograph grid. After stretching up to 90&percent;, the NCA broke loose at one end and contracted to a tightly folded chain. This pattern was observed in repeated tests. Mechanisms for this behavior and reasons for its generality are proposed. Implications are discussed for the ductility of nanoparticle ceramics, and the increased tensile strength and elastic modulus of rubber due to nanoparticle additives. ©1998 American Institute of Physics.
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