NANO-TECHNOLOGY FOR MINTING APPLICATIONS · PDF filenano-technology for minting applications...

NANO-TECHNOLOGY FOR MINTING APPLICATIONS�ROYAL CANADIAN MINT PHOTONIC COINS

JANUARY 29TH 2015

XIANYAO LI CHIEF TECHNOLOGY OFFICER,R&D CENTRE OF EXCELLENCE

VIBRANT COLORING TECHNOLOGIES

2

• Pad print, digital print coins

• Holographic coins

• Embedding crystals, Murano glass,

• Selective gold plating

• Niobium color coins

• Enameling coins

• A few others


3


•Holographic coins

• Embedding crystals, Murano glass



• Enameling coins


4



• Embedding Diamond, Crystals, Murano glass



• Enameling coins


5






• Enameling coins


6





•Niobium color coins

• Enameling coins


7

• Pad Print, digital print coins





• Enameling coins

NEW GENERATION OF COLORING TECHNOLOGY

8

• Nature and Nano technology

• Structural colors

Scientists have discovered that the butterfly wings are made of nanostructures, which contribute to the colors they have on their wings. These colors are referred to as structural color, rather than dyes, pigments, etc. They are also called photonic colors.

Nanostructureshttp://blog.colourstudio.com/2012/04/


9

• Royal Canadian Mint Photonic Coins


10

• Photonic coin technology

• Nanostructures are created by Picosecond Laser on metallic surface

• Holographic and fixed colors are created due to the nanostructures

• Significantly, fixed colors are achieved in a wide range


11

• Nano-structures are created by specialized laser technique

• Colors can be controlled and produced by selection of processing parameters


12

• Main differences between Holographic and Fixed colors

• Holographic: colors change with the viewing angles

• Fixed colors: colors do not change with viewing angles

Holographic color Fixed color


13

• Main difference between Holographic and Fixed colors

• Different nano-structures: sizes and texture orientations

Holographic color Fixed color


14

• Main difference between Holographic and Fixed colors

• Underlying mechanism of color formation is fundamentally different

Grating separates white light into its component wavelengths (colors)

Fixed color

Nano particle interaction with white light leads to plasmon resonance

Hologram

Refs: (left) http://people.whitman.edu/~dunnivfm/FAASICPMS_Ebook/CH1/1_3_2.html (right) http://www.hamamatsu.com/eu/en/technology/innovation/nanophotonics/index.html

EXAMPLE OF PLASMON RESONANCE: RED STAINED GLASS

15

• Gold nanoparticles mixed into the glass

• Applying light to nanoparticles creates electron oscillation = “plasmon”

• When the vibration of light resonates with the plasmon, light energy is absorbed

• Red stained glass: only the green component resonates and is absorbed. The blue light scatters at this time, and only the remaining red component passes through

Red + green = yellow Only red color is reflectedRef: http://www.hamamatsu.com/eu/en/technology/innovation/nanophotonics/index.html

COLOR CREATION PRINCIPLES

16

• Perceived color depends on nanoparticle size, spacing

Ref: www.NanoComposix.com

17

• Therefore, we have developed the Laser technology to control:

• Nano-particle size

• Spacing between the particles

• Volume distribution

• Materials characteristics

• And correlations among the parameters

COLOR CREATION PRINCIPLES

MINTING APPLICATIONS

18

• Wide range of colors can be selected

• Flexible and controllable selection of coloring methods

• True colors without using any dyes, pigments

• Ensure precious metal integrity without compromising purity for colors

• Colors can be achieved in flat surface and textured reliefs

• Future use for security features

THANK YOU

19

NANO-TECHNOLOGY FOR MINTING APPLICATIONS · PDF filenano-technology for minting applications...

Documents

Transcript of NANO-TECHNOLOGY FOR MINTING APPLICATIONS · PDF filenano-technology for minting applications...