Specimenprep

TEM Specimen Preparation By Nibiao Zheng

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object]

Tem preparation methods ,[object Object],[object Object],[object Object]

Powder specimen ,[object Object],[object Object],[object Object],[object Object]

Plan-view specimens ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Locally electropolishing ,[object Object],Anode electrolyte Copper wire specimen beaker Good for material that can’t be prepared by mechanical method. But the electrolyte needs H 3 PO 4 , which is easy to explode - need to be in cooling environment. Good for conventional TEM, not quite suitable for HRTEM Cathode

Cross-section specimens ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Notes for mechanical thinning ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Notes for operation of PIPS ,[object Object],[object Object],[object Object],[object Object],[object Object]

Focused Ion beam (FIB) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Procedure of FIB a. Select an area of interest, Coat with a layer of metal (Pt) b. Make “trench” using high current ion beam c. Thinning the wall d. Cut the wall and remove

Lithography ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Ultramicrotomy ,[object Object],[object Object],[object Object],[object Object]

Preferential chemical etching ,[object Object]

Other methods ,[object Object],[object Object],[object Object]

Contamination of TEM specimens ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Specimenprep

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Specimenprep