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Enhancement of Gold Nanoparticle Coupling with a 2D Plasmonic Crystal at High Incidence Angles.
Lu, Mengdi; Hong, Long; Liang, Yuzhang; Charron, Benjamin; Zhu, Hu; Peng, Wei; Masson, Jean-Francois.
Afiliación
  • Lu M; College of Physics and Optoelectronics Engineering , Dalian University of Technology , Dalian 116024 , China.
  • Hong L; Département de chimie and Centre Québécois sur les Matériaux Fonctionnels (CQMF) , Université de Montréal , CP. 6128 Succ. Centre-Ville , Montreal , QC H3C 3J7 , Canada.
  • Liang Y; School of Life Sciences , Peking University , Beijing 100871 , China.
  • Charron B; National Laboratory of Solid State Microstructures , Nanjing University , Nanjing 210093 , China.
  • Zhu H; Département de chimie and Centre Québécois sur les Matériaux Fonctionnels (CQMF) , Université de Montréal , CP. 6128 Succ. Centre-Ville , Montreal , QC H3C 3J7 , Canada.
  • Peng W; Département de chimie and Centre Québécois sur les Matériaux Fonctionnels (CQMF) , Université de Montréal , CP. 6128 Succ. Centre-Ville , Montreal , QC H3C 3J7 , Canada.
  • Masson JF; College of Physics and Optoelectronics Engineering , Dalian University of Technology , Dalian 116024 , China.
Anal Chem ; 90(11): 6683-6692, 2018 06 05.
Article en En | MEDLINE | ID: mdl-29738232
2D nanoplasmonic substrates excited in transmission spectroscopy are ideal for several biosensing, metamaterial, and optical applications. We show that their excellent properties can be further improved with plasmonic coupling of Au nanoparticles (AuNPs) on gold-coated nanodisk arrays excited at large incidence angles of up to 50°. The Bragg modes (BM) thereby strongly couple to AuNP immobilized on the plasmonic substrate due to shorter decay length of the plasmon at higher incidence angles, leading to a further enhanced field between the AuNP and the plasmonic substrate. The field was highest and two hotspots were created at orthogonal positions for AuNP located close to the corner of the Au film and Au nanodisk, which was also observed for AuNP dimers. Hybridization between single-stranded DNA (ssDNA) immobilized on the surface of the AuNPs and the capture ssDNA on the gold-coated nanodisk arrays led to at least a 5-fold signal improvement and a 7-fold lower limit of detection at 7 pM for ssDNA-functionalized AuNPs at large incident angles. Thus, we demonstrate that higher field strength can be accessed and the significant advantages of working with high incidence angles with AuNP on a 2D plasmonic crystal in plasmonic sensing.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Incidence_studies / Risk_factors_studies Idioma: En Revista: Anal Chem Año: 2018 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Incidence_studies / Risk_factors_studies Idioma: En Revista: Anal Chem Año: 2018 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos