The ToF-E detector telescope consisted of two circular carbon foils with 8 and 5 µg/cm 2 thicknesses, 6 mm radius, a 0.05-msr solid angle (ΔΩ), and a flight distance of 425 mm between the foils. Utilizing a ToF-GIC setup provides the system with a good energy resolution and enhanced ion species separation in terms of mass and energy. Average elemental compositions were also obtained from ToF-ERDA time-energy coincidence spectra using two different software packages, CONTES and Potku . Systematic uncertainties of the experiment, discussed in more detail elsewhere in particular for light elements, were estimated to be a maximum of 5-10%, whereas statistic uncertainties arisen from the number of experimental counts were ˂ 2.3%. However, the relative elemental concentrations were obtained with higher accuracy . The stopping power data required for both RBS and ERDA simulations was retrieved from SRIM2013 code. Cross-sectional transmission electron microscope (TEM) samples were prepared by the traditional sandwich approach, which includes sample cutting, gluing, polishing and ion milling. A Gatan Precision Ion Polishing System Model 691 operated at 5 kV and 40 mA, with an Ar ion source, was used to make the samples electron transparent. Scanning transmission electron microscopy (STEM) and selective area electron diffraction (SAED) characterization were performed using the Linköping double Cs corrected FEI Titan 3 60-300 operated at 300 kV.