Modification of Coin Surfaces Using Atomic Layer Deposition

Circulation coins present a large challenge from the point of view of protecting and

enhancing their appearance, as well as incorporating new features for recognition and

protection. An ideal technology for the modification of the surface of coins is atomic

layer deposition (ALD), where films of any thicknesses from just above the atomic

scale to the microscopic scale can be developed. These films need to be transparent

and colourless, as well as maintaining important characteristics (e.g. conductivity,

magnetism) of the coin substrate. Additionally, the films need to be rugged with

respect to wear and have to protect the coin substrate from tarnishing during normal

use. The project will explore the deposition of a variety of thin films on Canadian coin

surfaces, focusing high volatility, simple, and known precursor chemistry.

Faculty Supervisor:

Sean Barry

Student:

Partner:

Royal Canadian Mint

Discipline:

Physics

Sector:

Manufacturing

University:

Carleton University

Program:

Accelerate

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