Summary

• Figure Caption: TEM images illustrating how the morphology of EEBD tips using DGAA as precursor depends on the deposition conditions. (a) Apart from water vapor, all other tested environmental gasses (N2; O2/Ar; H2/He) have resulted in tips containing gold particles embedded in an amorphous carbon containing matrix. (b) When using water vapor as environmental gas, a dense gold core becomes increasingly pronounced as the vapor pressure and beam current is increased. (c) A contamination layer almost void of gold can be deposited on the tip by scanning the beam while imaging. So-called proximity contamination can also occur if depositions are done later within a range of a few μm from the tip. The contamination layer is thicker on the side facing later depositions. (d) Electron irradiation in SEM or TEM causes the contaminated tips to bend irreversibly towards the side with the thickest contamination layer. The tips were deposited from left to right and thus bent towards the last deposition.

• This illustration was made for the Opensource Handbook of Nanoscience and Nanotechnology

• Please acknowledge the Opensource Handbook of Nanoscience and Nanotechnology if you use this illustration!

• The image also appears on the Commons/nanotechnology page

• Illustration by Kristian Molhave

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