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Title: Self assembly of highly-ordered nanoparticle monolayers.

Abstract

When a drop of a colloidal solution of nanoparticles dries on a surface, it leaves behind coffee-stain-like rings of material with lace-like patterns or clumps of particles in the interior. These non-uniform mass distributions are manifestations of far-from-equilibrium effects, such as fluid flows and solvent fluctuations during late-stage drying. However, recently a strikingly different drying regime promising highly uniform, long-range-ordered nanocrystal monolayers has been found. Here we make direct, real-time and real-space observations of nanocrystal self-assembly to reveal the mechanism. We show how the morphology of drop-deposited nanoparticle films is controlled by evaporation kinetics and particle interactions with the liquid-air interface. In the presence of an attractive particle-interface interaction, rapid early-stage evaporation dynamically produces a two-dimensional solution of nanoparticles at the liquid-air interface, from which nanoparticle islands nucleate and grow. This self-assembly mechanism produces monolayers with exceptional long-range ordering that are compact over macroscopic areas, despite the far-from-equilibrium evaporation process. This new drop-drying regime is simple, robust and scalable, is insensitive to the substrate material and topography, and has a strong preference for forming monolayer films. As such, it stands out as an excellent candidate for the fabrication of technologically important ultra thin film materials for sensors, optical devices andmore » magnetic storage media.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF); USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
927985
Report Number(s):
ANL/MSD/JA-55201
TRN: US0804678
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nature Mater.; Journal Volume: 5; Journal Issue: 2006
Country of Publication:
United States
Language:
ENGLISH
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; DRYING; EVAPORATION; FABRICATION; FLUCTUATIONS; FLUID FLOW; KINETICS; MASS DISTRIBUTION; MORPHOLOGY; PARTICLE INTERACTIONS; SOLVENTS; STORAGE; SUBSTRATES; THIN FILMS; TOPOGRAPHY

Citation Formats

Bigioni, T. P., Lin, X.-M., Nguyen, T. T., Corwin, E. I., Witten, T. A., Jaeger, H. M., and Univ. of Chicago. Self assembly of highly-ordered nanoparticle monolayers.. United States: N. p., 2006. Web. doi:10.1038/nmat1611.
Bigioni, T. P., Lin, X.-M., Nguyen, T. T., Corwin, E. I., Witten, T. A., Jaeger, H. M., & Univ. of Chicago. Self assembly of highly-ordered nanoparticle monolayers.. United States. doi:10.1038/nmat1611.
Bigioni, T. P., Lin, X.-M., Nguyen, T. T., Corwin, E. I., Witten, T. A., Jaeger, H. M., and Univ. of Chicago. Sun . "Self assembly of highly-ordered nanoparticle monolayers.". United States. doi:10.1038/nmat1611.
@article{osti_927985,
title = {Self assembly of highly-ordered nanoparticle monolayers.},
author = {Bigioni, T. P. and Lin, X.-M. and Nguyen, T. T. and Corwin, E. I. and Witten, T. A. and Jaeger, H. M. and Univ. of Chicago},
abstractNote = {When a drop of a colloidal solution of nanoparticles dries on a surface, it leaves behind coffee-stain-like rings of material with lace-like patterns or clumps of particles in the interior. These non-uniform mass distributions are manifestations of far-from-equilibrium effects, such as fluid flows and solvent fluctuations during late-stage drying. However, recently a strikingly different drying regime promising highly uniform, long-range-ordered nanocrystal monolayers has been found. Here we make direct, real-time and real-space observations of nanocrystal self-assembly to reveal the mechanism. We show how the morphology of drop-deposited nanoparticle films is controlled by evaporation kinetics and particle interactions with the liquid-air interface. In the presence of an attractive particle-interface interaction, rapid early-stage evaporation dynamically produces a two-dimensional solution of nanoparticles at the liquid-air interface, from which nanoparticle islands nucleate and grow. This self-assembly mechanism produces monolayers with exceptional long-range ordering that are compact over macroscopic areas, despite the far-from-equilibrium evaporation process. This new drop-drying regime is simple, robust and scalable, is insensitive to the substrate material and topography, and has a strong preference for forming monolayer films. As such, it stands out as an excellent candidate for the fabrication of technologically important ultra thin film materials for sensors, optical devices and magnetic storage media.},
doi = {10.1038/nmat1611},
journal = {Nature Mater.},
number = 2006,
volume = 5,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}