Preparation of polymer gold nanoparticle composites with tunable plasmon coupling and their application as SERS substrates

Belhout, Samir A.; Baptista, Frederico R.; Devereux, Stephen; Parker, Anthony W.; Ward, Andrew D.; Quinn, Susan J.

doi:10.1039/c9nr05014k

Cited by 32 publications

(35 citation statements)

References 80 publications

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“…For example, fluorescence biopolymers for multiphoton FLIM and superresolution imaging, 24 and polymer gold nanoparticle composites for surface-enhanced Raman spectroscopy and scattering. 25 The variety of problems has often required exploiting combinations of imaging methods with exhaustive data analysis efforts, including in some instances, developing new analysis routines when commercial programmes were not available. 26,27,12 A cartoon commisioned by the CLF to celebrate Octopus' 10th Anniversary is shown in Figure 1.…”

Section: Within the Bosom Of The Octopusmentioning

confidence: 99%

A brief history of the octopus imaging facility to celebrate its 10th anniversary

Martin-Fernandez

2020

Journal of Microscopy

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Summary Octopus (Optics Clustered to OutPut Unique Solutions) celebrated in June 2020 its 10th birthday. Based at Harwell, near Oxford, Octopus is an open access, peer reviewed, national imaging facility that offers successful U.K. applicants supported access to single molecule imaging, confocal microscopy, several flavours of superresolution imaging, light sheet microscopy, optical trapping and cryoscanning electron microscopy. Managed by a multidisciplinary team, Octopus has so far assisted >100 groups of U.K. and international researchers. Cross‐fertilisation across fields proved to be a strong propeller of success underpinned by combining access to top‐end instrumentation with a strong programme of imaging hardware and software developments. How Octopus was born, and highlights of the multidisciplinary output produced during its 10‐year journey are reviewed below, with the aim of celebrating a myriad of collaborations with the U.K. scientific community, and reflecting on their scientific and societal impact.

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Section: Within the Bosom Of The Octopusmentioning

confidence: 99%

A brief history of the octopus imaging facility to celebrate its 10th anniversary

Martin-Fernandez

2020

Journal of Microscopy

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“…The combination of two or more plasmonic metals with an ultrashort distance will produce strong interfacial plasmon coupling, which can generate a much stronger electromagnetic field localization and enhancement than isolated metals can [18][19][20]. The plasmon coupling-based electromagnetic field can offer greater SERS and photocatalytic enhancements than individual metal nanocrystals can.…”

Section: Introductionmentioning

confidence: 99%

Dual Plasmon Resonances and Tunable Electric Field in Structure-Adjustable Au Nanoflowers for Improved SERS and Photocatalysis

et al. 2021

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Flower-like metallic nanocrystals have shown great potential in the fields of nanophononics and energy conversion owing to their unique optical properties and particular structures. Herein, colloid Au nanoflowers with different numbers of petals were prepared by a steerable template process. The structure-adjustable Au nanoflowers possessed double plasmon resonances, tunable electric fields, and greatly enhanced SERS and photocatalytic activity. In the extinction spectra, Au nanoflowers had a strong electric dipole resonance located around 530 to 550 nm. Meanwhile, a longitudinal plasmon resonance (730~760 nm) was obtained when the number of petals of Au nanoflowers increased to two or more. Numerical simulations verified that the strong electric fields of Au nanoflowers were located at the interface between the Au nanosphere and Au nanopetals, caused by the strong plasmon coupling. They could be further tuned by adding more Au nanopetals. Meanwhile, much stronger electric fields of Au nanoflowers with two or more petals were identified under longitudinal plasmon excitation. With these characteristics, Au nanoflowers showed excellent SERS and photocatalytic performances, which were highly dependent on the number of petals. Four-petal Au nanoflowers possessed the highest SERS activity on detecting Rhodamine B (excited both at 532 and 785 nm) and the strongest photocatalytic activity toward photodegrading methylene blue under visible light irradiation, caused by the strong multi-interfacial plasmon coupling and longitudinal plasmon resonance.

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“…The thermal effect of the process can also better promote the progress of the chemical reaction and is not limited to improving the selective enhancement of molecular signals. [23][24][25][26] The enhancement effect of semiconductors as SERS substrates is not as obvious as that of metal nanoparticles such as gold and silver. In order to solve the problem of the stability and enhancement effect of the substrate, Lombardi dispersed silver nanoparticles on CuO lms and used it as a SERS substrate.…”

Section: Introductionmentioning

confidence: 99%

A P/N type silicon semiconductor loaded with silver nanoparticles used as a SERS substrate to selectively drive the coupling reaction induced by surface plasmons

Zhao

Zhang

et al. 2020

Nanoscale Adv.

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Preparation of polymer gold nanoparticle composites with tunable plasmon coupling and their application as SERS substrates

Abstract: The plasmonic properties of composites with controlled AuNP loading are found to be well described by a plasmon ruler equation, and Raman optical tweezer results show the SERS performance in the bulk is dominated by the discrete composite properties.

Cited by 32 publications

References 80 publications

A brief history of the octopus imaging facility to celebrate its 10th anniversary

A brief history of the octopus imaging facility to celebrate its 10th anniversary

Dual Plasmon Resonances and Tunable Electric Field in Structure-Adjustable Au Nanoflowers for Improved SERS and Photocatalysis

A P/N type silicon semiconductor loaded with silver nanoparticles used as a SERS substrate to selectively drive the coupling reaction induced by surface plasmons

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