Focused electron beam induced deposition of gold

Utke, Ivo; Hoffmann, P.; Dwir, B.; Leifer, Klaus; Kapon, E.; Doppelt, P.

doi:10.1116/1.1319690

Cited by 157 publications

(143 citation statements)

References 14 publications

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“…In the literature various methods are discussed to obtain an increase of the electrical conductivity [9]. Among these methods are: careful selection of the electron beam parameters used for the deposition [26], annealing of the samples in reactive atmosphere [27] and deposition from carbon-free precursors [28]. Postgrowth electron beam irradiation has been used to tailor the grain size of Pt nanocrystallites and to increase the electrical conductivity in deposits grown from the carbon-free Pt(PF3)4 precursor [29].…”

Section: Discussionmentioning

confidence: 99%

Tuning the electrical conductivity of Pt-containing granular metals by postgrowth electron irradiation

Porrati

Sachser

Schwalb

et al. 2011

Journal of Applied Physics

103

171

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We have fabricated Pt-containing granular metals by focused electron beam induced deposition from the (CH3)3CH3C5H4Pt precursor gas. The granular metals are made of platinum nanocrystallites embedded in a carbonaceous matrix. We have exposed the asgrown nanocomposites to low energy electron beam irradiation and we have measured the Finally, by means of AFM measurements we observe a reduction of the volume of the samples with increasing irradiation time which we attribute to the removal of carbon molecules.

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Section: Discussionmentioning

confidence: 99%

Tuning the electrical conductivity of Pt-containing granular metals by postgrowth electron irradiation

Porrati

Sachser

Schwalb

et al. 2011

Journal of Applied Physics

103

171

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“…16 In recent years, considerable progress has been made in the fabrication of metallic nanostructures in a controlled manner, including features in the 10-50 nm range. [17][18][19][20][21][22][23][24][25][26] Metallic particles with a variety of shapes and dimensions are now readily available for experiments. A thorough understanding of the detailed local fields associated with plasmon resonant particles is therefore warranted, to enhance the design and optimization of applications based on these particles.…”

Section: Introductionmentioning

confidence: 99%

Plasmon resonances of silver nanowires with a nonregular cross section

et al. 2001

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We investigate numerically the spectrum of plasmon resonances for metallic nanowires with a nonregular cross section, in the 20-50 nm range. We first consider the resonance spectra corresponding to nanowires whose cross sections form different simplexes. The number of resonances strongly increases when the section symmetry decreases: A cylindrical wire exhibits one resonance, whereas we observe more than five distinct resonances for a triangular particle. The spectral range covered by these different resonances becomes very large, giving to the particle-specific distinct colors. At the resonance, dramatic field enhancement is observed at the vicinity of nonregular particles, where the field amplitude can reach several hundred times that of the illumination field. This near-field enhancement corresponds to surface-enhanced Raman scattering ͑SERS͒ enhancement locally in excess of 10 12 . The distance dependence of this enhancement is investigated and we show that it depends on the plasmon resonance excited in the particle, i.e., on the illumination wavelength. The average Raman enhancement for molecules distributed on the entire particle surface is also computed and discussed in the context of experiments in which large numbers of molecules are used.

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“…It should be noted that considerable progress has been made in recent years in the fabrication of metallic nanostructures in a controlled manner, including features in the 10-50 nm range [19,20,21,22,23,24,25,26,27,28]. Metallic particles with a variety of shapes and dimensions are now readily available for experiments.…”

Section: Introductionmentioning

confidence: 99%

Plasmon Resonances in Nanowires with a Non—regular Cross-Section

Martin

Topics in Applied Physics

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Abstract. We investigate numerically the spectrum of plasmon resonances for metallic nanowires with a non-regular cross-section in the 20-50 nm range. After briefly recalling the physical properties of metals at optical frequencies, we point out the intrinsic difficulties in the computation of the plasmon resonances for nanoparticles with a non-regular shape. We then consider the resonance spectra corresponding to nanowires whose cross-sections form different simplexes. The number of resonances strongly increases when the section symmetry decreases: A cylindrical wire exhibits one resonance, whereas we observe more than 5 distinct resonances for a triangular particle. The spectral range covered by these different resonances becomes very large, giving to the particle specific distinct colors. At the resonance, dramatic field enhancement is observed at the vicinity of non-regular particles, where the field amplitude can reach several hundred times that of the illumination field. This near-field enhancement corresponds to surface enhanced Raman scattering (SERS) enhancement locally in excess of 10 12 . The distance dependence of this enhancement is investigated and we show that it depends on the plasmon resonance excited in the particle, i.e. on the illumination wavelength. The average Raman enhancement for molecules distributed on the entire particle surface is also computed and discussed in the context of experiments in which large numbers of molecules are used. Finally we discuss the influence of the model permittivity which enters the calculation, as well as the resonances shift and broadening produced by a water background.

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Focused electron beam induced deposition of gold

Cited by 157 publications

References 14 publications

Tuning the electrical conductivity of Pt-containing granular metals by postgrowth electron irradiation

Tuning the electrical conductivity of Pt-containing granular metals by postgrowth electron irradiation

Plasmon resonances of silver nanowires with a nonregular cross section

Plasmon Resonances in Nanowires with a Non—regular Cross-Section

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