Conditions for formation of germanium quantum dots in amorphous matrices by MeV ions: Comparison with standard thermal annealing

Bogdanović-Radović, Ivančica; Buljan, Maja; Karlušić, Marko; Skukan, Natko; Božičević, Iva; Jakšić, Milko; Radić, Nikola; Dražić, Goran; Bernstorff, Sigrid

doi:10.1103/physrevb.86.165316

Cited by 16 publications

(17 citation statements)

References 24 publications

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“…The density of deposited energy, usually expressed in terms of the SHI's electronic stopping power (keV nm -1 ), is often quite sufficient to produce permanent damage along the ion trajectory (i.e. ion track) or activate various thermally driven processes enabling patterning or synthesis of nano-structured materials [4,[7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the existence of the velocity effect, medium sized accelerators can provide important complementary data at energies below 1 MeV amu −1 which are not easily accessible to large accelerators. In particular, the threshold for ion track formation constitutes an important experimental quantity (often needed for testing various ion-solid interaction models) that can be in many cases easily accessible to medium sized accelerators [1,9,11,16,19,25,26]. Similar to ion tracks in the bulk, there is always a threshold for nanohillock formation on the surface.…”

Section: Introductionmentioning

confidence: 99%

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On the threshold for ion track formation in CaF₂

et al. 2017

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There is an ongoing debate regarding the mechanism of swift heavy ion (SHI) track formation in CaF 2 . The objective of this study is to shed light on this important topic using a range of complementary experimental techniques. Evidence of the threshold for ion track formation being below 3 keV nm −1 is provided by both transmission electron microscopy (TEM) and Rutherford backscattering spectroscopy in the channelling mode, which has direct consequences for the validity of models describing the response of CaF 2 to SHI irradiation. Furthermore, information about the elemental composition within the ion tracks is obtained using scanning TEM, electron energy loss spectroscopy, and with respect to the stoichiometry of the materials surface by in situ time of flight elastic recoil detection analysis. Advances in the analyses of the experimental data presented here pave the way for a better understanding of the ion track formation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the threshold for ion track formation in CaF₂

et al. 2017

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“…Only for very small ion tracks with radii less than 2 nm, RBS/c yields lower values of the ion track sizes than TEM because such small tracks tend to be discontinuous. Analyzing ion tracks in amorphous materials is even more challenging, but recently other techniques like small angle X-ray scattering (SAXS) and infrared spectroscopy (IR) were found to be applicable [29][30][31][32][33][34][35].…”

Section: Materials Response To Energetic Ionsmentioning

confidence: 99%

“…The structural properties of the GaN surfaces irradiated by SHIs at grazing angle were analysed by the GISAXS technique [32,33]. GISAXS intensity distributions measured on differently treated surfaces are shown in Fig.3.…”

Section: Grazing Incidence Small Angle X-ray Scattering (Gisaxs)mentioning

confidence: 99%

Response of GaN to energetic ion irradiation: conditions for ion track formation

Karlušić¹,

Kozubek²,

Lebius³

et al. 2015

J. Phys. D: Appl. Phys.

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We investigated the response of wurzite GaN thin films to energetic ion irradiation. Both swift heavy ions (92 MeV Xe 23+ , 23 MeV I 6+ ) and highly charged ions (100 keV Xe 40+ ) were used. After irradiation, the samples were investigated using atomic force microscopy, grazing incidence small angle X-ray scattering, Rutherford backscattering spectroscopy in channelling orientation and time of flight elastic recoil detection analysis. Only grazing incidence swift heavy ion irradiation induced changes on the surface of the GaN, when the appearance of nanoholes is accompanied by a notable loss of nitrogen. The results are discussed in the framework of the thermal spike model.

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“…The type of modification depends on the irradiated system as well as on the beam properties. For single ion impact, surface modifications like pits [5,6], craters [7][8][9], hillocks [10][11][12] and foldings [13] are formed, while for higher fluences various thermally driven processes like formation of nanoparticles can be observed [14]. Furthermore, these modifications can be locally induced by micro beam setups [15].…”

Section: Introductionmentioning

confidence: 97%