Optical properties of nanoporous gold foams
Abstract
We fabricated and experimentally studied Au nano-foams and Al2O3 scaffolds filled with Au nanoparticles (NPs). We found that while the reflectance spectra of Au nano-foams depended very little on the 8-10 nm Al2O3 ALD coating, the spectra were highly sensitive to annealing, which increased the sizes of voids and ligaments from 50-100 nm to ~300 nm. The effective dielectric permittivities of the Au nano-foams and Al2O3 scaffolds with Au NPs were extremely high, ~50. At the same time, Au nano-foams covered with a dielectric (MgF2) featured bright structural colors, calling for the model, which extends beyond the effective medium approximation.
- Authors:
-
- Norfolk State Univ., VA (United States). Center for Material Research
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nanoscale Synthesis and Characterization Lab.
- MIT Lincoln Lab., Lexington, MA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Norfolk State Univ., VA (United States); MIT Lincoln Lab., Lexington, MA (United States)
- Sponsoring Org.:
- USDOE; National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR); US Army Research Office (ARO)
- OSTI Identifier:
- 1523570
- Alternate Identifier(s):
- OSTI ID: 1468505
- Report Number(s):
- LLNL-JRNL-746772
Journal ID: ISSN 2158-3226; 931587
- Grant/Contract Number:
- AC52-07NA27344; 1205457; 1646789; FA9550-14-1-0221; FA8721-05-C-0002; FA8702-15-D-0001; W911NF-14-1-0639
- Resource Type:
- Accepted Manuscript
- Journal Name:
- AIP Advances
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 9; Journal ID: ISSN 2158-3226
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; nanomaterials; reflectometry; metal oxides; transition metals; nanoparticles; thin films; dielectric properties; optical properties; effective medium approximation
Citation Formats
Asane, J. K., Qi, Z., Biener, M. M., Liberman, V., and Noginov, M. A. Optical properties of nanoporous gold foams. United States: N. p., 2018.
Web. doi:10.1063/1.5030128.
Asane, J. K., Qi, Z., Biener, M. M., Liberman, V., & Noginov, M. A. Optical properties of nanoporous gold foams. United States. https://doi.org/10.1063/1.5030128
Asane, J. K., Qi, Z., Biener, M. M., Liberman, V., and Noginov, M. A. Tue .
"Optical properties of nanoporous gold foams". United States. https://doi.org/10.1063/1.5030128. https://www.osti.gov/servlets/purl/1523570.
@article{osti_1523570,
title = {Optical properties of nanoporous gold foams},
author = {Asane, J. K. and Qi, Z. and Biener, M. M. and Liberman, V. and Noginov, M. A.},
abstractNote = {We fabricated and experimentally studied Au nano-foams and Al2O3 scaffolds filled with Au nanoparticles (NPs). We found that while the reflectance spectra of Au nano-foams depended very little on the 8-10 nm Al2O3 ALD coating, the spectra were highly sensitive to annealing, which increased the sizes of voids and ligaments from 50-100 nm to ~300 nm. The effective dielectric permittivities of the Au nano-foams and Al2O3 scaffolds with Au NPs were extremely high, ~50. At the same time, Au nano-foams covered with a dielectric (MgF2) featured bright structural colors, calling for the model, which extends beyond the effective medium approximation.},
doi = {10.1063/1.5030128},
journal = {AIP Advances},
number = 9,
volume = 8,
place = {United States},
year = {Tue Sep 04 00:00:00 EDT 2018},
month = {Tue Sep 04 00:00:00 EDT 2018}
}
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Cited by: 4 works
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Figures / Tables:
Fig. 1: (a) Scanning Electron Microscope (SEM) image of “as is” Au nano-foam sample. (b) SEM image of the Al2O3 scaffold filled with Au nanoparticles.
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Figures / Tables found in this record:
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