Gold nanoparticle arrays assembled on the reconstructed surface of block copolymer thin films

Liu, Zhicheng; Chang, Tongxin; Huang, Haiying; He, Tianbai

doi:10.1039/c3ra43394c

Cited by 19 publications

(12 citation statements)

References 57 publications

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“…A bottom-up method for converting surfaces into SERS sensors is by coating them with a nanopatterned block copolymer (BCP) template, such as in the form of micelles that guide the deposition of AuNPs into well-ordered arrays, investigated almost exclusively with flat and low-curvature substrates. − One of the most facile methods for directly achieving a phase-separated BCP coating on a fiber is dip coating, which consists of simply dipping the fiber into a BCP solution and then withdrawing it at a controlled rate. , However, the dip-coated film thickness decreases with a decrease in fiber diameter, resulting in incomplete micellar coverage on low-diameter fibers. This can be compensated up to a point by increasing the BCP solution concentration and the withdrawal speed of the fiber from the solution, as achieved for fiber diameters down to 25 μm .…”

Section: Introductionmentioning

confidence: 99%

Block Copolymer Brush Layer-Templated Gold Nanoparticles on Nanofibers for Surface-Enhanced Raman Scattering Optophysiology

Zhu

Lussier

Ducrot

et al. 2019

ACS Appl. Mater. Interfaces

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A nanothin block copolymer (BCP) brush-layer film adsorbed on glass nanofibers is shown to address the longstanding challenge of forming a template for the deposition of dense and well-dispersed nanoparticles on highly curved surfaces, allowing the development of an improved nanosensor for neurotransmitters. We employed a polystyrene-block-poly(4-vinylpyridine) BCP and plasmonic gold nanoparticles (AuNPs) of 52 nm in diameter for the fabrication of the nanosensor on pulled fibers with diameters down to 200 nm. The method is simple, using only solution processes and a plasma cleaning step. The templating of the AuNPs on the nanofiber surprisingly gave rise to more than 1 order of magnitude improvement in the surface-enhanced Raman scattering (SERS) performance for 4mercaptobenzoic acid compared to the same AuNPs aggregated on identical fibers without the use of a template. We hypothesize that a wavelength-scale lens formed by the nanofiber contributes to enhancing the SERS performance to the extent that it can melt the glass nanofiber under moderate laser power. We then show the capability of this nanosensor to detect the corelease of the neurotransmitters dopamine and glutamate from living mouse brain dopaminergic neurons with a sensitivity 1 order of magnitude greater than with aggregated AuNPs. The simplicity of fabrication and the far superior performance of the BCP-templated nanofiber demonstrates the potential of this method to efficiently pattern nanoparticles on highly curved surfaces and its application as molecular nanosensors for cell physiology.

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Section: Introductionmentioning

confidence: 99%

Block Copolymer Brush Layer-Templated Gold Nanoparticles on Nanofibers for Surface-Enhanced Raman Scattering Optophysiology

Zhu

Lussier

Ducrot

et al. 2019

ACS Appl. Mater. Interfaces

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“…The formation of well-dened QDs/BCP hybrid micelles with high QDs loading is crucial to the development of functional nanomaterials. 19,53 However, in most previous reports, the NPs density in polymer hybrid micelles was usually low. The reason is that the incorporation of NPs with high loading in host polymer domain leads to high chain conformation entropic penalty and drastically affects the self-assembly structure by changing the relative volume ratio between the two different blocks.…”

Section: Improving the Qds Loading In Hybrid Micellesmentioning

confidence: 88%

Luminous block copolymer–quantum dots hybrids formed by cooperative assembly in a selective solvent

Nie

Jiang

2014

RSC Adv.

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“…While the T g increases as much as 6 °C for PS, P2VP shows up to a 20 °C increase. This is attributed to P2VP’s stronger affinity for gold than PS, which has been demonstrated in the literature to be a result of the coordination between the gold and the nitrogen atom in the pyridine group of P2VP. ,− Furthermore, whereas the unfilled NPG undergoes coarsening, the pore size of NPG infiltrated with polymer remains constant over 200 days at room temperature. This enhanced morphological stability may address an outstanding limitation when using nanoporous metals as electrodes in battery applications.…”

Section: Introductionmentioning

confidence: 89%

Effect of Nanoscale Confinement on Polymer-Infiltrated Scaffold Metal Composites

Maguire

Bilchak

Corsi

et al. 2021

ACS Appl. Mater. Interfaces

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Most research on polymer composites has focused on adding discrete inorganic nanofillers to a polymer matrix to impart properties not found in polymers alone. However, properties such as ion conductivity and mechanical reinforcement would be greatly improved if the composite exhibited an interconnected network of inorganic and polymer phases. Here, we fabricate bicontinuous polymer-infiltrated scaffold metal (PrISM) composites by infiltrating polymer into nanoporous gold (NPG) films. Polystyrene (PS) and poly(2-vinylpyridine) (P2VP) films are infiltrated into the ∼43 nm diameter NPG pores via capillary forces during thermal annealing above the polymer glass transition temperature (T g ). The infiltration process is characterized in situ using spectroscopic ellipsometry. PS and P2VP, which have different affinities for the metal scaffold, exhibit slower segmental dynamics compared to their bulk counterparts when confined within the nanopores, as measured through T g . The more attractive P2VP shows a 20 °C increase in T g relative to its bulk, while PS only shows a 6 °C increase at a comparable molecular weight. The infiltrated polymer, in turn, stabilizes the gold nanopores against temporal coarsening. The broad tunability of these polymer/metal hybrids represents a unique template for designing functional network composite structures with applications ranging from flexible electronics to fuel cell membranes.

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Gold nanoparticle arrays assembled on the reconstructed surface of block copolymer thin films

Cited by 19 publications

References 57 publications

Block Copolymer Brush Layer-Templated Gold Nanoparticles on Nanofibers for Surface-Enhanced Raman Scattering Optophysiology

Block Copolymer Brush Layer-Templated Gold Nanoparticles on Nanofibers for Surface-Enhanced Raman Scattering Optophysiology

Luminous block copolymer–quantum dots hybrids formed by cooperative assembly in a selective solvent

Effect of Nanoscale Confinement on Polymer-Infiltrated Scaffold Metal Composites

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