Tecnai G2 F30 FEG TEM HF 2000 FEG TEM JEM 2010 HRTEM JEM 2000 EXII HRTEM JEM 200CX TEM Positron lifetime spectroscopy Gatan 691 PIPS Ion Mill et al, 4sets Workstation, such as Dell Precision 420, Sun SiliconGraphics, Alpha Furnace for preparation of nanowire