Abstract
This paper describes how the ability to tune each nanoparticle in a plasmonic hetero-oligomer can optimize architectures for plasmon-enhanced applications. We demonstrate how a large-area nanofabrication approach, reconstructable mask lithography (RML), can achieve independent control over the size, position, and material of up to four nanoparticles within a subwavelength unit. We show how arrays of plasmonic hetero-oligomers consisting of strong plasmonic materials (Au) and reactant-specific elements (Pd) provide a unique platform for enhanced hydrogen gas sensing. Using finite-difference time-domain simulations, we modeled different configurations of Au-Pd hetero-oligomers and compared their hydrogen gas sensing capabilities. In agreement with calculations, we found that Au-Pd nanoparticle dimers showed a red-shift and that Au-Pd trimers with touching Au and Pd nanoparticles showed a blue-shift upon exposure to both high and low concentrations of hydrogen gas. Both Au-Pd hetero-oligomer sensors displayed high sensitivity, fast response times, and excellent recovery.
| Original language | English |
|---|---|
| Pages (from-to) | 7639-7647 |
| Number of pages | 9 |
| Journal | ACS Nano |
| Volume | 8 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2014 |
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Keywords
- Au-Pd nanoparticle dimers
- Au-Pd nanoparticle trimers
- heterogeneous oligomers
- hydrogen sensing
- nanofabrication
- plasmonic assemblies
ASJC Scopus subject areas
- Engineering(all)
- Materials Science(all)
- Physics and Astronomy(all)
Cite this
Hetero-oligomer nanoparticle arrays for plasmon-enhanced hydrogen sensing. / Yang, Ankun; Huntington, Mark D.; Cardinal, M. Fernanda; Masango, Sicelo S.; Van Duyne, Richard P.; Odom, Teri W.
In: ACS Nano, Vol. 8, No. 8, 2014, p. 7639-7647.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hetero-oligomer nanoparticle arrays for plasmon-enhanced hydrogen sensing
AU - Yang, Ankun
AU - Huntington, Mark D.
AU - Cardinal, M. Fernanda
AU - Masango, Sicelo S.
AU - Van Duyne, Richard P.
AU - Odom, Teri W
PY - 2014
Y1 - 2014
N2 - This paper describes how the ability to tune each nanoparticle in a plasmonic hetero-oligomer can optimize architectures for plasmon-enhanced applications. We demonstrate how a large-area nanofabrication approach, reconstructable mask lithography (RML), can achieve independent control over the size, position, and material of up to four nanoparticles within a subwavelength unit. We show how arrays of plasmonic hetero-oligomers consisting of strong plasmonic materials (Au) and reactant-specific elements (Pd) provide a unique platform for enhanced hydrogen gas sensing. Using finite-difference time-domain simulations, we modeled different configurations of Au-Pd hetero-oligomers and compared their hydrogen gas sensing capabilities. In agreement with calculations, we found that Au-Pd nanoparticle dimers showed a red-shift and that Au-Pd trimers with touching Au and Pd nanoparticles showed a blue-shift upon exposure to both high and low concentrations of hydrogen gas. Both Au-Pd hetero-oligomer sensors displayed high sensitivity, fast response times, and excellent recovery.
AB - This paper describes how the ability to tune each nanoparticle in a plasmonic hetero-oligomer can optimize architectures for plasmon-enhanced applications. We demonstrate how a large-area nanofabrication approach, reconstructable mask lithography (RML), can achieve independent control over the size, position, and material of up to four nanoparticles within a subwavelength unit. We show how arrays of plasmonic hetero-oligomers consisting of strong plasmonic materials (Au) and reactant-specific elements (Pd) provide a unique platform for enhanced hydrogen gas sensing. Using finite-difference time-domain simulations, we modeled different configurations of Au-Pd hetero-oligomers and compared their hydrogen gas sensing capabilities. In agreement with calculations, we found that Au-Pd nanoparticle dimers showed a red-shift and that Au-Pd trimers with touching Au and Pd nanoparticles showed a blue-shift upon exposure to both high and low concentrations of hydrogen gas. Both Au-Pd hetero-oligomer sensors displayed high sensitivity, fast response times, and excellent recovery.
KW - Au-Pd nanoparticle dimers
KW - Au-Pd nanoparticle trimers
KW - heterogeneous oligomers
KW - hydrogen sensing
KW - nanofabrication
KW - plasmonic assemblies
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U2 - 10.1021/nn502502r
DO - 10.1021/nn502502r
M3 - Article
VL - 8
SP - 7639
EP - 7647
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 8
ER -