Ferroelectric-assisted gold nanoparticles array for centimeter-scale highly reproducible SERS substrates

Xiaoyan Liu, Minoru Osada, Kenji Kitamura, Takahiro Nagata, Donghui Si

研究成果: Article

6 引用 (Scopus)

抄録

Assemble metal nanoparticles into various ordered structures with scale up to centimeter area is required to meet diverse needs of lab-on-a-chips and analytic components. Here, we present the uniform and high-yield fabrication of centimeter-scale gold nanoparticles (AuNPs) array for SERS substrates. Ferroelectric-assisted assembly of AuNPs line array is successfully fabricated by using a periodically poled LiNbO3 (PPLN) single crystal as a template. SNOM-Raman shows that the uniform assembly of AuNPs exhibits a high density of "hot spots" arising from strong electromagnetic (EM) field coupling induced by adjacent AuNPs. Quantitative analysis based on SERS detection describes an excellent reproducibility with an intensity variation less than 7% at 1649 cm-1 of Rhodamine 6G. SERS spectra combined with 3D-FDTD modelling indicate that the EM enhancement occurs at all three excitation wavelength of 515, 561 and 633 nm and the 561-nm-laser displays the strongest Raman enhancement with an enhancement factor in an order of 109. The corresponding experimental and theoretical results present a new strategy to fabricate large-area, highly reproducible and sensitive SERS substrates for practical applications.

元の言語English
記事番号3630
ジャーナルScientific Reports
7
発行部数1
DOI
出版物ステータスPublished - 2017 12 1
外部発表Yes

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Gold
Ferroelectric materials
Nanoparticles
Near field scanning optical microscopy
Lab-on-a-chip
Metal nanoparticles
Substrates
Electromagnetic fields
Single crystals
Fabrication
Wavelength
Lasers
Chemical analysis
lithium niobate
rhodamine 6G

ASJC Scopus subject areas

  • General

これを引用

Ferroelectric-assisted gold nanoparticles array for centimeter-scale highly reproducible SERS substrates. / Liu, Xiaoyan; Osada, Minoru; Kitamura, Kenji; Nagata, Takahiro; Si, Donghui.

:: Scientific Reports, 巻 7, 番号 1, 3630, 01.12.2017.

研究成果: Article

Liu, Xiaoyan ; Osada, Minoru ; Kitamura, Kenji ; Nagata, Takahiro ; Si, Donghui. / Ferroelectric-assisted gold nanoparticles array for centimeter-scale highly reproducible SERS substrates. :: Scientific Reports. 2017 ; 巻 7, 番号 1.
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