High-resolution surface plasmon imaging of gold nanoparticles by energy-filtered transmission electron microscopy

Schaffer, Bernhard; Hohenester, Ulrich; Trügler, Andreas; Hofer, Ferdinand

doi:10.1103/physrevb.79.041401

Cited by 176 publications

(137 citation statements)

References 33 publications

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“…It was also demonstrated that energy-filtered transmission electron microscopy (EFTEM) can be equivalently employed to obtain the same information [8]. Plasmons in nanoparticles of other geometries were also visualized with SI methods [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In particular, to investigate SERS activity, Guiton et al employed STEM-EELS to probe the fields of plasmons in silver nanorods and correlated this with far-field scattering spectroscopy [15].…”

Section: Introductionmentioning

confidence: 99%

Photon-induced near-field electron microscopy: Mathematical formulation of the relation between the experimental observables and the optically driven charge density of nanoparticles

Park

Zewail

2014

Phys. Rev. A

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Photon-induced near-field electron microscopy (PINEM) enables the visualization of the plasmon fields of nanoparticles via measurement of photon-electron interaction [S. T. Park et al., New J. Phys. 12, 123028 (2010)]. In this paper, the field integral, which is a mechanical work performed on a fast electron by the total electric field, plays a key role in understanding the interaction. Here, we reexamine the field integral and give the physical meaning by decomposing the contribution of the field from the charge-density distribution. It is found that the "near-field integral" (the near-field approximation of the field integral) can be expressed as a convolution of the two-dimensional projection of the optically driven charge-density distribution in the nanoparticle with a broad radial response function. This approach, which we call the "convolution method," is validated by applying it to Rayleigh scattering cases, where previous analytical expressions for the field integrals in near-field approximations are reproduced by the convolution method. The convolution method is applied to discrete dipole approximation calculations of a silver nanorod, and the nature of the induced charge-density distributions of its plasmons is discussed.

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Section: Introductionmentioning

confidence: 99%

Photon-induced near-field electron microscopy: Mathematical formulation of the relation between the experimental observables and the optically driven charge density of nanoparticles

Park

Zewail

2014

Phys. Rev. A

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“…6 Plasmons in nanoparticles of other geometries were also visualized by SI methods. [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Consequently, simulations of EELS of nanoparticles have been studied extensively to reveal their relation to plasmon fields. 2,[22][23][24] In particular, to investigatte SERS activity, Guiton et.…”

Section: Introductionmentioning

confidence: 99%

Photon-induced near-field electron microscopy

Barwick

Flannigan

Zewail

2009

Nature

649

642

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Ultrafast electron microscopy in the space and time domains utilizes a pulsed electron probe to directly map structural dynamics of nanomaterials initiated by an optical pump pulse, in imaging, diffraction, spectroscopy, and their combinations. It has demonstrated its capability in the studies of phase transitions, mechanical vibrations, and chemical reactions. Moreover, electrons can directly interact with photons via the near field component of light scattering by nanostructures, and either gain or lose light quanta discretely in energy. By energetically selecting those electrons that exchanged photon energies, we can map this photon-electron interaction, and the technique is termed photon-induced near field electron microscopy (PINEM). Here, we give an account of the theoretical understanding of PINEM. Experimentally, nanostructures such as a sphere, cylinder, strip, and triangle have been investigated. Theoretically, time-dependent Schrödinger and Dirac equations for an electron under light are directly solved to obtain analytical solutions. The interaction probability is expressed by the mechanical work done by an optical wave on a traveling electron, which can be evaluated analytically by the near field components of the Rayleigh scattering for small spheres and thin cylinders, and numerically by the discrete dipole approximation for other geometries. Application in visualization of plasmon fields is discussed.

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“…Spatial resolution of better than 1 nm and detection limit of less than a monolayer of elements are readily attainable in EFTEM [63,64]. In order to give quantitative images of the distribution of a specific element in EFTEM, the background generated by plural-scattering should be calculated and then subtracted to leave the edge EELS can be utilized to obtain information on the composition, valence state, chemical bonding information and electronic structures of solid state materials [65].…”

Section: Eds and Eelsmentioning

confidence: 99%

Transmission electron microscopy analysis of some transition metal compounds for energy storage and conversion

Liang

Fu-xin

Fan

et al. 2017

TrAC Trends in Analytical Chemistry

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High-resolution surface plasmon imaging of gold nanoparticles by energy-filtered transmission electron microscopy

Cited by 176 publications

References 33 publications

Photon-induced near-field electron microscopy: Mathematical formulation of the relation between the experimental observables and the optically driven charge density of nanoparticles

Photon-induced near-field electron microscopy: Mathematical formulation of the relation between the experimental observables and the optically driven charge density of nanoparticles

Photon-induced near-field electron microscopy

Transmission electron microscopy analysis of some transition metal compounds for energy storage and conversion

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