Snowflake. Coloured low-temperature scanning electron micrograph (LT-SEM) of a snowflake. To prepare for the imaging process the snow and ice crystals are collected on copper sample plates containing pre-cooled methyl cellulose solution. The plates are then rapidly cooled to -196 degrees Celsius in a bath of liquid nitrogen. The samples are then either held in storage or photographed using a field emission scanning electron microscope that has been pre-cooled to -170 degrees Celsius. Magnification: x83, when printed 10 centimetres wide.
July 24th, 2016
Viewed 16 Times - Last Visitor from Fairfield, CT on 03/02/2019 at 3:54 PM