Morphology Effects of Cap-shaped Silver Nanoparticle Films as a SERS Platform
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- TAKEI Hiroyuki
- Faculty of Life Sciences, Toyo University Bio-Nanoelectronics Centre, Toyo University
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- OKAMOTO Takayuki
- RIKEN
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Abstract
In this paper, we evaluate randomly adsorbed cap-shaped silver nanoparticles for applications to surface-enhanced Raman spectroscopy, SERS. They were prepared by depositing silver on top of surface-adsorbed monodisperse SiO2 nanospheres, in a manner similar to the method for preparing metal film on nanosphere, MFON, but one major difference lies in the fact that nanospheres are randomly adsorbed rather than as a close-packed MFON. With random MFON, it is possible to incorporate nanospheres with more than one size. Mixing has been found to increase SERS performance. More specifically, by using 50 and 100 nm nanospheres, we found that substrates containing both types outperform substrates prepared from 100% of either 50 or 100 nm nanospheres. As evaluated by spectrophotometry, this increase could not be attributed to an increase in the extinction coefficient of the substrate at the irradiation wavelength of SERS measurements.
Journal
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- Analytical Sciences
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Analytical Sciences 32 (3), 287-293, 2016
The Japan Society for Analytical Chemistry
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Details 詳細情報について
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- CRID
- 1390282679235863936
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- NII Article ID
- 130005131635
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- NII Book ID
- AA10500785
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- ISSN
- 13482246
- 09106340
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- NDL BIB ID
- 027203896
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- PubMed
- 26960607
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- Abstract License Flag
- Disallowed