Gold nanoparticles resist deformation by swift heavy ion irradiation when embedded in a crystalline matrix

Kerboua, Chahineze Harkati; Chicoine, M.; Roorda, S.

doi:10.1016/j.nimb.2011.06.001

Cited by 11 publications

(2 citation statements)

References 25 publications

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“…(2) The matrix must be amorphisable. The shape transformation is not observed for NPs in an unamorphisable matrix such as AlAs [51,52], suggesting ion track formation must also play an active role in the process. (3) The shape transformation proceeds progressively with ion fluence, typically necessitating thousands of overlapping impacts for completion [53], though perceptible changes in shape are measureable following a single ion impact [54].…”

Section: Metal Nanoparticle Modification In Amorphous Siomentioning

confidence: 99%

Ion–solid interactions at the extremes of electronic energy loss: Examples for amorphous semiconductors and embedded nanostructures

Ridgway

Djurabekova

Nordlund

2015

Current Opinion in Solid State and Materials Science

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A selection of ion-solid interactions in the swift heavy-ion irradiation regime is reviewed. We consider the effects of electronic energy loss at tens of keV/nm on both bulk material and nanostructures embedded in a matrix. Specific examples include ion track formation at low ion fluences in bulk Si and Ge and porous layer formation at high ion fluences in bulk Ge. In addition, the intriguing shape and phase transformations observable at high ion fluences in Ge and metallic nanoparticles embedded in bulk SiO 2 are examined and compared. Experiment, modelling and simulation are combined synergistically as we seek fundamental atomistic insight into these unique yet poorly understood processes operative only at the extremes of electronic energy loss.

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Section: Metal Nanoparticle Modification In Amorphous Siomentioning

confidence: 99%

Ion–solid interactions at the extremes of electronic energy loss: Examples for amorphous semiconductors and embedded nanostructures

Ridgway

Djurabekova

Nordlund

2015

Current Opinion in Solid State and Materials Science

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“…Available experiments indicate that the ion-shaping process is not observed if the NPs are embedded in radiation-resistant matrix [14][15], but only if they are embedded in an amorphisable or amorphous matrix [5,[16][17][18][19]. In addition, it has been demonstrated that the ion-track formation is a necessary condition for the observation of the elongation of the NPs [20][21].…”

Section: Introductionmentioning

confidence: 99%

Elongation mechanism of the ion shaping of embedded gold nanoparticles under swift heavy ion irradiation

Dufour

Khomenkov

et al. 2019

Nuclear Instruments and Methods in Physics Research Section B:

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The elongation process under swift heavy ion irradiation (74 MeV Kr ions) of gold NPs, with a diameter in the range 10-30 nm, and embedded in a silica matrix has been investigated by combining experiment and simulation techniques: three-dimensional thermal spike (3DTS), molecular dynamics (MD) and a phenomenological simulation code specially developed for this study. 3DTS simulations evidence the formation of a track in the host matrix and the melting of the NP after the passage of the impinging ion. MD simulations demonstrate that melted NPs have enough time to expand after each ion impact. Our phenomenological simulation relies on the expansion of the melted NP, which flows in the track in silica, followed by its recrystallization upon cooling. Finally, the elongation of the spherical NP into a cylindrical one, with a length proportional to its initial size and a width close to the diameter of the track, is the result of the superposition of the independent effects of each expansion/recrystallization process occurring for each ion impact. In agreement with experiment, the simulation shows the gradual elongation of spherical NPs in the ion-beam direction until their widths saturate in the steady state and reach the value of the track diameter. Moreover, the simulations indicate that the expansion of the gold NP is incomplete at each ion impact.

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Ion-Shaping of Nanoparticles

Rizza

Ridgway

2016

Springer Series in Surface Sciences

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Gold nanoparticles resist deformation by swift heavy ion irradiation when embedded in a crystalline matrix

Cited by 11 publications

References 25 publications

Ion–solid interactions at the extremes of electronic energy loss: Examples for amorphous semiconductors and embedded nanostructures

Ion–solid interactions at the extremes of electronic energy loss: Examples for amorphous semiconductors and embedded nanostructures

Elongation mechanism of the ion shaping of embedded gold nanoparticles under swift heavy ion irradiation

Ion-Shaping of Nanoparticles

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