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Self-standing Nanoparticle Membranes and Capsules

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journal contribution
posted on 20.08.2012 by Henry Chan, Petr Král
We perform coarse-grained molecular dynamics simulations of self-standing nanoparticle membranes observed in recent experiments (Nat. Mater. 6, 656 (2007)). In order to make our simulations feasible, we model 2 − 3 times smaller gold nanoparticles (core radius of rcore ≈ 0.8 nm) covered with alkanethiol ligands (length of lligand ≈ 0.5−2.6 nm). We study the structure, stability, and mechanical properties of these membranes and show that these characteristics are controlled by the ratio of RLC = lligand/rcore. For RLC ≈ 0.6, the ligated nanoparticles form well ordered mono- layers with hexagonal packing, in agreement with the experiments (RLC ≈ 0.44). For RLC ≈ 1.6, the nanoparticles form less organized multilayers, which are more stable and flexible. We show that these membranes could potentially form stable capsules for molecular storage and delivery.

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The original version is available through Royal Society of Chemistry at DOI: 10.1039/c0nr00912a

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Royal Society of Chemistry

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en_US

issn

2040-3364

Issue date

01/04/2011

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