Academic Journal
Gold Nanoparticle Plasmonic Superlattices as Surface Enhanced Raman Spectroscopy Substrates
| العنوان: | Gold Nanoparticle Plasmonic Superlattices as Surface Enhanced Raman Spectroscopy Substrates |
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| المؤلفون: | Matricardi, Cristiano, Hanske, Christoph, García Pomar, Juan Luis, Langer, Judith, Mihi, Agustín, Liz-Marzán, Luis Manuel |
| المساهمون: | Ministerio de Economía y Competitividad (España), European Research Council |
| بيانات النشر: | American Chemical Society |
| سنة النشر: | 2018 |
| المجموعة: | Digital.CSIC (Consejo Superior de Investigaciones Científicas / Spanish National Research Council) |
| مصطلحات موضوعية: | SERS, Gold nanoparticles, Lattice plasmon, Self-assembly, Rayleigh anomaly |
| الوصف: | Metal colloids are of great interest in the field of nanophotonics, mainly due to their morphology-dependent optical properties, but also because they are high quality building blocks for complex plasmonic architectures. Close-packed colloidal supercrystals not only serve for investigating the rich plasmonic resonances arising in strongly coupled arrangements, but also enables tailoring the optical response, on both the nano- and the macroscale. Bridging these vastly different length scales at reasonable fabrication costs has remained fundamentally challenging, but is essential for applications in sensing, photovoltaics or optoelectronics, among other fields. We present here a scalable approach to engineer plasmonic supercrystal arrays, based on the template-assisted assembly of gold nanospheres with topographically patterned polydimethylsiloxane molds. Regular square arrays of hexagonally packed supercrystals were achieved, reaching periodicities down to 400 nm and feature sizes around 200 nm, over areas up to 0.5 cm2. These two-dimensional supercrystals exhibit well-defined collective plasmon modes that can be tuned from the visible through the near-infrared by simple variation of the lattice parameter. We present electromagnetic modelling of the physical origin of the underlying hybrid modes, and demonstrate the application of superlattice arrays as surface-enhanced Raman scattering (SERS) spectroscopy substrates which can be tailored for a specific probe laser. We therefore investigated the influence of the lattice parameter, local degree of order, and cluster architecture, to identify the optimal configuration for highly efficient SERS of a non-resonant Raman probe with 785 nm excitation. ; The authors thank Dr. Guillermo González-Rubio for providing nanoparticles and assistance with the synthesis. C.H. acknowledges funding from the Alexander von Humboldt Foundation through a Feodor Lynen fellowship. Funding by the Spanish Ministerio de Economía, Industria y Competitividad (MINECO) is gratefully ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1936-0851 |
| Relation: | #PLACEHOLDER_PARENT_METADATA_VALUE#; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2015-0496; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2016-79053-P; info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2017-86659-R; info:eu-repo/grantAgreement/EC/H2020/637116; Postprint; http://dx.doi.org/10.1021/acsnano.8b04073; Sí; ACS Nano: 10.1021/acsnano.8b04073 (2018); http://hdl.handle.net/10261/168803; http://dx.doi.org/10.13039/501100003329; http://dx.doi.org/10.13039/501100000781 |
| DOI: | 10.13039/501100003329 |
| DOI: | 10.13039/501100000781 |
| الاتاحة: | http://hdl.handle.net/10261/168803 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/501100000781 |
| Rights: | open |
| رقم الانضمام: | edsbas.C5CAB236 |
| قاعدة البيانات: | BASE |
| تدمد: | 19360851 |
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| DOI: | 10.13039/501100003329 |