Poster Presentation 10
Gold Nanoparticle Monolayers
with Tunable Optical and Electrical Properties
Guang Yanga,b, Longqian Huc, Timothy D. Keiperc, Peng Xiongc, Daniel T. Hallinan Jr.a,b,*
a
Florida State University — Aero-propulsion, Mechatronics & Energy Center — 2003 Levy Avenue, Tallahassee, FL 32310, USA
Florida A&M University-Florida State University College of Engineering, Department of Chemical and Biomedical Engineering,
2525 Pottsdamer Street, Tallahassee, FL 32310, USA
c
Florida State University, Department of Physics, Tallahassee, FL 32306, USA
b
ABSTRACT
Centimeter-scale gold nanoparticle (Au NP) monolayer films have been fabricated using a water/organic
solvent self-assembly strategy. A recently-developed approach, “drain to deposit”, is demonstrated most
effective to transfer the Au NP films from the water/organic solvent interface to various solid substrates while
maintaining their integrity. The interparticle spacing was tuned from 1.4 nm to 3.1 nm using different length
alkylamine ligands. The ordering of the films increased with increasing ligand length. The surface plasmon
resonance and the in-plane electrical conductivity of the Au NP films both exhibit an exponential dependence
on the interparticle spacing. These findings show great potential in scaling up the manufacturing of highperformance optical and electronic devices based on two-dimensional metallic nanoparticle superlattices.
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