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© Yasushi Kuroda, Toshie Yaguchi (Hitachi Science Systems, Ltd.)
© Takahito Hashimoto (Instrument Division, Hitachi, Ltd.)
© Kazuyuki Tohji (Tohoku University)
These balls are magnetic particles of about 1 micron in diameter attached on carbon paste. These balls produce specific color by selective light reflection due to optical interference. They are called stratified particles. The picture was recorded using a 200 kV SEM. These stratified particles look like balls of duckweed growing in the bottom of a fresh water lake under the sunshine.
At 55th photo contest hosted by the Japanese Society of Electron Microscopy in 1999.