Hyperspectral imaging of plasmon resonances in metallic nanoparticles

Zopf, David; Jatschka, Jacqueline; Dathe, André; Jahr, Norbert; Fritzsche, Wolfgang; Stránik, Ondrej

doi:10.1016/j.bios.2016.03.001

Cited by 27 publications

(15 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6,13,19,26−31 Moreover, multiple individual nanoparticles can be addressed simultaneously using concepts such as hyperspectral imaging and derivatives. 32−35 This potentially offers similar insights as recently obtained by in situ X-ray absorption spectromicroscopy at a beamline 4,7 but with benchtop optical microscopy instrumentation for optical dark-field scattering spectroscopy. 36…”

supporting

confidence: 52%

In Situ Plasmonic Nanospectroscopy of the CO Oxidation Reaction over Single Pt Nanoparticles

et al. 2019

View full text Add to dashboard Cite

The ongoing quest to develop single-particle methods for the in situ study of heterogeneous catalysts is driven by the fact that heterogeneity in terms of size, shape, grain structure, and composition is a general feature among nanoparticles in an ensemble. This heterogeneity hampers the generation of a deeper understanding for how these parameters affect catalytic properties. Here we present a solution that in a single benchtop experimental setup combines single-particle plasmonic nanospectroscopy with mass spectrometry for gas phase catalysis under reaction conditions at high temperature. We measure changes in the surface state of polycrystalline platinum model catalyst particles in the 70 nm size range and the corresponding bistable kinetics during the carbon monoxide oxidation reaction via the peak shift of the dark-field scattering spectrum of a closely adjacent plasmonic nanoantenna sensor and compare these changes with the total reaction rate measured by the mass spectrometer from an ensemble of nominally identical particles. We find that the reaction kinetics of simultaneously measured individual Pt model catalysts are dictated by the grain structure and that the superposition of the individual nanoparticle response can account for the significant broadening observed in the corresponding nanoparticle ensemble data. In a wider perspective our work enables in situ plasmonic nanospectroscopy in controlled gas environments at high temperature to investigate the role of the surface state on transition metal catalysts during reaction and of processes such as alloying or surface segregation in situ at the single-nanoparticle level for model catalysts in the few tens to hundreds of nanometer size range.

show abstract

supporting

confidence: 52%

In Situ Plasmonic Nanospectroscopy of the CO Oxidation Reaction over Single Pt Nanoparticles

et al. 2019

View full text Add to dashboard Cite

show abstract

“…This limits the maximal number of particles possible to analyze simultaneously to something between 10 and 25 (the higher number could be achieved by using electron-beam lithography to nanofabricate particles aligned in a single row). However, employing concepts like hyperspectral imaging, significantly more particles can be analyzed simultaneously at the cost of significantly decreased data acquisition speed 58 , 59 . The illumination source of the microscope was a 50 W halogen lamp (Nikon LV-HL50W LL).…”

Section: Methodsmentioning

confidence: 99%

Grain boundary mediated hydriding phase transformations in individual polycrystalline metal nanoparticles

et al. 2017

View full text Add to dashboard Cite

Grain boundaries separate crystallites in solids and influence material properties, as widely documented for bulk materials. In nanomaterials, however, investigations of grain boundaries are very challenging and just beginning. Here, we report the systematic mapping of the role of grain boundaries in the hydrogenation phase transformation in individual Pd nanoparticles. Employing multichannel single-particle plasmonic nanospectroscopy, we observe large variation in particle-specific hydride-formation pressure, which is absent in hydride decomposition. Transmission Kikuchi diffraction suggests direct correlation between length and type of grain boundaries and hydride-formation pressure. This correlation is consistent with tensile lattice strain induced by hydrogen localized near grain boundaries as the dominant factor controlling the phase transition during hydrogen absorption. In contrast, such correlation is absent for hydride decomposition, suggesting a different phase-transition pathway. In a wider context, our experimental setup represents a powerful platform to unravel microstructure–function correlations at the individual-nanoparticle level.

show abstract

“…The hyperspectral imaging system is a custom-built machinery by SIOS Meßtechnik GmbH (Ilmenau, Germany) and ABS GmbH (Jena, Germany) on the basis of previous research 43 .…”

Section: Fourier-transform-imaging Spectrometermentioning

confidence: 99%

Plasmonic Nanosensor Array for Multiplexed DNA-based Pathogen Detection

et al. 2019

Self Cite

View full text Add to dashboard Cite

In this research we introduce a plasmonic nanoparticle based optical biosensor for monitoring of molecular binding events. The sensor utilizes spotted gold nanoparticle arrays as sensing platform. The nanoparticle spots are functionalized with capture DNA sequences complementary to the analyte (target) DNA. Upon incubation with the target sequence, it will bind on the respectively complementary functionalized particle spot. This binding changes the local refractive index, which is detected spectroscopically as the resulting changes of the localized surface plasmon resonance (LSPR) peak wavelength. In order to increase the signal, a small gold nanoparticle label is introduced. The binding can be reversed using chemical means (10 mM HCl). It is demonstrated that a multiplexed detection and identification of several fungal pathogen DNA sequences subsequently on one sensor array is possible by this approach.

show abstract

Hyperspectral imaging of plasmon resonances in metallic nanoparticles

Cited by 27 publications

References 23 publications

In Situ Plasmonic Nanospectroscopy of the CO Oxidation Reaction over Single Pt Nanoparticles

In Situ Plasmonic Nanospectroscopy of the CO Oxidation Reaction over Single Pt Nanoparticles

Grain boundary mediated hydriding phase transformations in individual polycrystalline metal nanoparticles

Plasmonic Nanosensor Array for Multiplexed DNA-based Pathogen Detection

Contact Info

Product

Resources

About