Size-dependent effect of ion bombardment on Au nanoparticles on top of various substrates: Thermodynamically dominated capillary forces versus sputtering

Klimmer, A.; Ziemann, P.; Biskupek, Johannes; Kaiser, Ute; Flesch, M.

doi:10.1103/physrevb.79.155427

Cited by 54 publications

(73 citation statements)

References 23 publications

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“…4. Curvature perpendicular to the ion incidence azimuth increases sputtering if the cylinder radius becomes smaller than a, and forward sputtering becomes possible.…”

Section: Discussionmentioning

confidence: 99%

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Sputter yield of curved surfaces

et al. 2015

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The mean sputter yield produced by the impact of a single ion depends on the radii of curvature of the target surface at the point of impact. Using the Sigmund model of ion sputtering, we develop analytical formulae for this dependence for the case in which the radii of curvature are large compared to the size of the ion-induced collision cascade; both locally perpendicular and oblique ion impact are considered. The sputter yield is increased for impact on convex surfaces. The influence of surface curvature along the incident-ion azimuth and perpendicular to it are discussed separately. Our analytical results are in good agreement with Monte Carlo simulations for the specific case of 20 keV Ar ion impact on a cylindrical nanowire consisting of amorphous silicon. We also extend the results for this case to small radii of curvature using both Monte Carlo and molecular dynamics simulations.

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“…4. Curvature perpendicular to the ion incidence azimuth increases sputtering if the cylinder radius becomes smaller than a, and forward sputtering becomes possible.…”

Section: Discussionmentioning

confidence: 99%

“…Applications range from ion irradiation of dust grains in the space environment [2,3] to the sputtering of nanoparticles supported on flat surfaces [4].…”

Section: Introductionmentioning

confidence: 99%

Sputter yield of curved surfaces

et al. 2015

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“…4a). The bimetallic nanoballs embedment in the Al 2 O 3 substrate can be interpreted as thermodynamic driving forces resulting from different surface energies of the particle and its substrate in relation to their particle-substrate interface energy, which can lead to a burrowing of the particles if the ion bombardment can induce effective ion-induced viscosity of the substrate [17,25]. Even throng the crystalline sapphire has such low ion-induced viscosity that the burrowing effect can be neglected.…”

Section: Effects Of Annealing On the Nanostructuresmentioning

confidence: 99%

Shift of localized surface plasmon resonance by Ar-ion irradiation of Ag–Au bimetallic films deposited on Al2O3 single crystals

Meng

Shibayama

et al. 2013

Nuclear Instruments and Methods in Physics Research Section B:

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Effects of Ar-ion induced surface nanostructuring were studied using 100 keV Ar-ion irradiation of 30 nm Ag-Au bimetallic films deposited on Al 2 O 3 single crystals, under irradiation fluences ranging from 5.0 × 10 15 cm -2 to 6.3 × 10 16 cm -2 . Scanning electron microscope was used to study the ionbeam-induced surface nanostructuring. As the irradiation fluence increased, dewetting of the bimetallic films on the Al 2 O 3 substrate was observed, and formation of isolated Ag-Au nanostructures sustained on the substrate were obtained. Next, thermal annealing was performed under high vacuum at 1073 K for 2 hours; a layer of photosensitive Ag-Au alloy nanoballs partially embedded in the Al 2 O 3 substrate was obtained when higher fluence irradiation (> 3.8 × 10 16 cm -2 ) was used. The microstructures of the nanoballs were investigated using a transmission electron microscope, and the nanoballs were found to be single crystals with a FCC structure. In addition, photoabsorption spectra were measured, and localized surface plasmon resonance peaks were observed. With increase in the irradiation fluence, the size of the Ag-Au nanoballs on the substrate decreased, and a blue-shift of the LSPR peaks was observed. Further control of the LSPR frequency over a wide range was achieved by modifying the chemical components, and a red-shift of the LSPR peaks was observed as the Au concentration increased. In summary, ion irradiation is an effective approach toward surface nanostructuring, and the nanocomposites obtained have potential applications in optical devices.

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“…By tuning the LSPR frequency using these factors, metallic nanoparticle/dielectric systems can be devised for applications such as biosensors, [5][6][7][8][9][10][11] plasmonic waveguides, 12 and photocatalysts. 13 Metallic nanostructures can be prepared on the surface of metallic thin films deposited on dielectric or semiconductor substrates via irradiation of the surface with a quantum beam such as an ion beam, [14][15][16][17][18][19][20][21][22][23] nanosecond-pulsed laser, 24,25 or electron beam. 26 Surface nanostructures are formed by dewetting caused by irradiation with a quantum beam.…”

mentioning

confidence: 99%

“…26 Surface nanostructures are formed by dewetting caused by irradiation with a quantum beam. [14][15][16][17][18][19][20][21][22][23][24][25][26] Under ion irradiation, metal nanoparticles that form on the surface through the dewetting process become embedded in SiO 2 glass 21,23 and Al 2 O 3 22 substrates because the viscosity of the substrate changes and it undergoes plastic flow during ion irradiation. 16,19 Laser-induced periodic surface structures (LIPSS) can be obtained via nanosecond-pulsed laser irradiation.…”

mentioning

confidence: 99%

Effects of ion and nanosecond-pulsed laser co-irradiation on the surface nanostructure of Au thin films on SiO2 glass substrates

Shibayama

Meng

et al. 2014

Journal of Applied Physics

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Ion irradiation synthesis of Ag-Au bimetallic nanospheroids in SiO2 glass substrate with tunable surface plasmon resonance frequency J. Appl. Phys. 114, 054308 (2013) Ion irradiation and short-pulsed laser irradiation can be used to form nanostructures on the surfaces of substrates. This work investigates the synergistic effects of ion and nanosecond-pulsed laser co-irradiation on surface nanostructuring of Au thin films deposited under vacuum on SiO 2 glass substrates. Gold nanoparticles are randomly formed on the surface of the substrate after nanosecond-pulsed laser irradiation under vacuum at a wavelength of 532 nm with a repetition rate of 10 Hz and laser energy density of 0.124 kJ/m 2 . Gold nanoparticles are also randomly formed on the substrate after 100-keV Ar þ ion irradiation at doses of up to 3.8 Â 10 15 ions/cm 2 , and nearly all of these nanoparticles are fully embedded in the substrate. With increasing ion irradiation dose (number of incident laser pulses), the mean diameter of the Au nanoparticles decreases (increases). However, Au nanoparticles are only formed in a periodic surface arrangement after co-irradiation with 6000 laser pulses and 3.8 Â 10 15 ions/cm 2 . The periodic distance is $540 nm, which is close to the wavelength of the nanosecond-pulsed laser, and the mean diameter of the Au nanoparticles remains at $20 nm with a relatively narrow distribution. The photoabsorption peaks of the ion-or nanosecond-pulsed laser-irradiated samples clearly correspond to the mean diameter of Au nanoparticles. Conversely, the photoabsorption peaks for the co-irradiated samples do not depend on the mean nanoparticle diameter. This lack of dependence is likely caused by the periodic nanostructure formed on the surface by the synergistic effects of co-irradiation. V C 2014 AIP Publishing LLC.

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Size-dependent effect of ion bombardment on Au nanoparticles on top of various substrates: Thermodynamically dominated capillary forces versus sputtering

Cited by 54 publications

References 23 publications

Sputter yield of curved surfaces

Sputter yield of curved surfaces

Shift of localized surface plasmon resonance by Ar-ion irradiation of Ag–Au bimetallic films deposited on Al2O3 single crystals

Effects of ion and nanosecond-pulsed laser co-irradiation on the surface nanostructure of Au thin films on SiO2 glass substrates

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