Study of temperature rise during focused Ga ion beam irradiation using nanothermo-probe

Shukla, Neeraj Kr.; Tripathi, Sarita; Banerjee, Amit; Ramana, A. Sai Venkata; Rajput, Nitul S.; Kulkarni, V. N.

doi:10.1016/j.apsusc.2009.07.024

Cited by 40 publications

(30 citation statements)

References 21 publications

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“…However, it must be noted that all these experiments were carried out with TEM sample preparation apparatus with a beam size that is assumed to be smaller than that of the broad milling system used in this study. In fact, the temperature is closely related to the dose per area that a surface receives and a temperature rise of approximately 1000°C was measured immediately after irradiation of an SiO 2 substrate with a highly energetic Ga + focused ion beam (Shukla et al, 2009). Because the irradiated surface is of the order of 80 mm² with the specific geometry used in our set-up, the power per surface unit was decreased and the surface heating was thus reduced.…”

Section: Ion Beam Etchingmentioning

confidence: 99%

About the contrast of δ’ precipitates in bulk Al–Cu–Li alloys in reflection mode with a field‐emission scanning electron microscope at low accelerating voltage

Brodusch

Voisard

Gauvin

2017

Journal of Microscopy

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Characterising the impact of lithium additions in the precipitation sequence in Al-Li-Cu alloys is important to control the strengthening of the final material. Since now, transmission electron microscopy (TEM) at high beam voltage has been the technique of choice to monitor the size and spatial distribution of δ' precipitates (Al Li). Here we report on the imaging of the δ' phase in such alloys using backscattered electrons (BSE) and low accelerating voltage in a high-resolution field-emission scanning electron microscope. By applying low-energy Ar ion milling to the surface after mechanical polishing (MP), the MP-induced corroded layers were efficiently removed and permitted the δ's to be visible with a limited impact on the observed microstructure. The resulting BSE contrast between the δ's and the Al matrix was compared with that obtained using Monte Carlo modelling. The artefacts possibly resulting from the sample preparation procedure were reviewed and discussed and permitted to confirm that these precipitates were effectively the metastable δ's. The method described in this report necessitates less intensive sample preparation than that required for TEM and provides a much larger field of view and an easily interpretable contrast compared to the transmission techniques.

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Section: Ion Beam Etchingmentioning

confidence: 99%

About the contrast of δ’ precipitates in bulk Al–Cu–Li alloys in reflection mode with a field‐emission scanning electron microscope at low accelerating voltage

Brodusch

Voisard

Gauvin

2017

Journal of Microscopy

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“…After most of the thinning was completed with 30 keV Ga+ ions, a standard “low‐keV clean” was performed with 2 keV Ga+ ions to reduce the final damage layer thickness to that expected to be generally insignificant. Ion beam currents were reduced as the TEM sample was thinned to avoid energy‐transfer rates that could raise temperatures within the remaining thickness of material …”

Section: Methodsmentioning

confidence: 99%

Reverse Engineering Ancient Greek Ceramics: Morphological and Spectral Characterization of Replicates

et al. 2016

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Athenian pottery, the ceramics produced in the Attica region of Greece between the 6th and 4th centuries B.C., is considered a benchmark technological achievement of the preindustrial world. This work advances our understanding of the firing protocols employed by the ancient Greeks to produce their black‐on‐red designs by characterizing replicates painted with a refined illite clay and fired under oxidizing/reducing/reoxidizing conditions (three‐stage firing). Systematically varying the temperature, atmosphere, and duration of each firing stage within the three‐stage firing scheme allowed the conditions necessary to obtain black and red gloss, both of which are observed on ancient vessels, to be determined. The morphology and elemental distribution of particles formed within the gloss thus formed were characterized using transmission electron microscopy and spectrocolorimetric measurements. Comparison of the results obtained from ancient sherds with those obtained from the replicate samples provides a means of estimating the firing conditions used to create the ancient vessels.

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“…The conventional acceleration voltages (16-30kV), currents (�2.5 nA) that are used to successfully shape specimens from metallic materials can lead to amorphization, chemical degradation and formation of structural defects within organic specimens [11][12][13]. Additionally, the temperature increase on the sample surface induced by ion milling may also adversely affect the microstructure and consequently the properties of different type of materials [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Cryo-focused ion beam preparation of perovskite based solar cells for atom probe tomography

et al. 2020

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Focused-ion beam lift-out and annular milling is the most common method used for obtaining site specific specimens for atom probe tomography (APT) experiments and transmission electron microscopy. However, one of the main limitations of this technique comes from the structural damage as well as chemical degradation caused by the beam of high-energy ions. These aspects are especially critical in highly-sensitive specimens. In this regard, ion beam milling under cryogenic conditions has been an established technique for damage mitigation. Here, we implement a cryo-focused ion beam approach to prepare specimens for APT measurements from a quadruple cation perovskite-based solar cell device with 19.7% efficiency. As opposed to room temperature FIB milling we found that cryo-milling considerably improved APT results in terms of yield and composition measurement, i.e. halide loss, both related to less defects within the APT specimen. Based on our approach we discuss the prospects of reliable atom probe measurements of perovskite based solar cell materials. An insight into the field evaporation behavior of the organic-inorganic molecules that compose the perovskite material is also given with the aim of expanding the applicability of APT experiments towards nano-characterization of complex organo-metal materials.

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Study of temperature rise during focused Ga ion beam irradiation using nanothermo-probe

Cited by 40 publications

References 21 publications

About the contrast of δ’ precipitates in bulk Al–Cu–Li alloys in reflection mode with a field‐emission scanning electron microscope at low accelerating voltage

About the contrast of δ’ precipitates in bulk Al–Cu–Li alloys in reflection mode with a field‐emission scanning electron microscope at low accelerating voltage

Reverse Engineering Ancient Greek Ceramics: Morphological and Spectral Characterization of Replicates

Cryo-focused ion beam preparation of perovskite based solar cells for atom probe tomography

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