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A Versatile Self-Assembly Strategy for the Synthesis of Shape-Selected Colloidal Noble Metal Nanoparticle Heterodimers

Tina Gschneidtner (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Yuri A. Diaz Fernandez (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Svetlana Syrenova (Institutionen för teknisk fysik, Kemisk fysik) ; Fredrik Westerlund (Institutionen för kemi- och bioteknik, Fysikalisk kemi) ; Christoph Langhammer (Institutionen för teknisk fysik, Kemisk fysik) ; Kasper Moth-Poulsen (Institutionen för kemi- och bioteknik, Polymerteknologi)
Langmuir (0743-7463). Vol. 30 (2014), 11, p. 3041-3050.
[Artikel, refereegranskad vetenskaplig]

The self-assembly of individual nanoparticles into-dimers so-called heterodimers-is relevant for a broad range of applications, in particular in the vibrant field of nano-plasmonics and nanooptics. In this paper we report the synthesis and characterization of material- and shape-selected nanoparticle heterodimers assembled from individual particles via electrostatic interaction. The versatility of the synthetic strategy is shown by assembling combinations of metal particles of different shapes, sizes, and metal compositions like a gold sphere (90 nm) with either a gold cube (35 nm), gold rhombic dodecahedron (50 nm), palladium truncated cube (120 nm), palladium rhombic dodecahedron (110 nm), palladium octahedron (130 nm), or palladium cubes (25 and 70 nm) as well as a silver sphere (90 nm) with palladium cubes (25 and 70 nm). The obtained heterodimer combinations are characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), scanning transmission electron microscopy energy dispersive X-ray spectroscopy (STEM-EDX), dynamic light scattering (DLS), and zeta-potential measurements. We describe the optimal experimental conditions to achieve the highest yield of heterodimers compared to other aggregates. The experimental results have been rationalized using theoretical modeling. A proof-of-principle experiment where individual Au-Pd heterodimers are exploited for indirect plasmonic sensing of hydrogen finally illustrates the potential of these structures to probe catalytic processes at the single particle level.

Nyckelord: SURFACE-PLASMON RESONANCE, GOLD NANOPARTICLES, NANOCRYSTALS, ACID, NANOSTRUCTURES, AGGREGATION, NANODISKS, SENSORS, GROWTH



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Denna post skapades 2014-05-05. Senast ändrad 2015-07-28.
CPL Pubid: 197567

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Polymerteknologi (2005-2014)
Institutionen för teknisk fysik, Kemisk fysik (1900-2015)
Institutionen för kemi- och bioteknik, Fysikalisk kemi (2005-2014)

Ämnesområden

Energi
Materialvetenskap
Nanovetenskap och nanoteknik
Kemi
Materialkemi

Chalmers infrastruktur

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