Self-assembled electrical contact to nanoparticles using metallic droplets

Kan Du; Christopher R. Knutson; Elizabeth Glogowski; Kevin D. McCarthy; Roy Shenhar; Vincent M. Rotello; Mark T. Tuominen; Todd Emrick; Thomas P. Russell; Anthony D. Dinsmore

doi:10.1002/smll.200900203

Self-assembled electrical contact to nanoparticles using metallic droplets

Kan Du^*, Christopher R. Knutson, Elizabeth Glogowski, Kevin D. McCarthy, Roy Shenhar, Vincent M. Rotello, Mark T. Tuominen, Todd Emrick, Thomas P. Russell, Anthony D. Dinsmore

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

A study was conducted to demonstrate a simple approach where liquid-metal droplets were coated with a monolayer of ligand-stabilized nanoparticles. Devices formed by this method showed electron transport between droplets that is characteristic of the Coulomb blockade where current was suppressed below a tunable threshold voltage. This approach allowed the generation of a large number of devices in parallel, as nanoparticle-nanoparticle-coated liquid-metal droplets were deposited in a straightforward process on large substrates patterned by microcontact printing or other large-area methods. The devices were composed of of molten gallium (Ga) droplets that served as the conducting electrodes. The Ga droplets were suspended in acid to prevent oxidation. Au nanoparticles stabilized by (1-mercaptoundec-11-yl)-tetra(ethylene glycol) (TEG-OH) ligands were added to the suspension.

Original language	English
Pages (from-to)	1974-1977
Number of pages	4
Journal	Small
Volume	5
Issue number	17
DOIs	https://doi.org/10.1002/smll.200900203
State	Published - 4 Sep 2009

Keywords

Coulomb blockade
Liquid metals
Nanoparticles selfassembly

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10.1002/smll.200900203

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abstract = "A study was conducted to demonstrate a simple approach where liquid-metal droplets were coated with a monolayer of ligand-stabilized nanoparticles. Devices formed by this method showed electron transport between droplets that is characteristic of the Coulomb blockade where current was suppressed below a tunable threshold voltage. This approach allowed the generation of a large number of devices in parallel, as nanoparticle-nanoparticle-coated liquid-metal droplets were deposited in a straightforward process on large substrates patterned by microcontact printing or other large-area methods. The devices were composed of of molten gallium (Ga) droplets that served as the conducting electrodes. The Ga droplets were suspended in acid to prevent oxidation. Au nanoparticles stabilized by (1-mercaptoundec-11-yl)-tetra(ethylene glycol) (TEG-OH) ligands were added to the suspension.",

keywords = "Coulomb blockade, Liquid metals, Nanoparticles selfassembly",

author = "Kan Du and Knutson, {Christopher R.} and Elizabeth Glogowski and McCarthy, {Kevin D.} and Roy Shenhar and Rotello, {Vincent M.} and Tuominen, {Mark T.} and Todd Emrick and Russell, {Thomas P.} and Dinsmore, {Anthony D.}",

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AU - Shenhar, Roy

AU - Rotello, Vincent M.

AU - Tuominen, Mark T.

AU - Emrick, Todd

AU - Russell, Thomas P.

AU - Dinsmore, Anthony D.

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AB - A study was conducted to demonstrate a simple approach where liquid-metal droplets were coated with a monolayer of ligand-stabilized nanoparticles. Devices formed by this method showed electron transport between droplets that is characteristic of the Coulomb blockade where current was suppressed below a tunable threshold voltage. This approach allowed the generation of a large number of devices in parallel, as nanoparticle-nanoparticle-coated liquid-metal droplets were deposited in a straightforward process on large substrates patterned by microcontact printing or other large-area methods. The devices were composed of of molten gallium (Ga) droplets that served as the conducting electrodes. The Ga droplets were suspended in acid to prevent oxidation. Au nanoparticles stabilized by (1-mercaptoundec-11-yl)-tetra(ethylene glycol) (TEG-OH) ligands were added to the suspension.

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KW - Nanoparticles selfassembly

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Self-assembled electrical contact to nanoparticles using metallic droplets

Abstract

Keywords

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