3.2.8 Explore.pdf - Dust particles are tiny and powerful...

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Dust particles are tiny and powerful nano-factories. They produce chemical species and the mechanism that converts species from dust to gas species is elusive but with experimental evidence, the conclusion was made that species forming on interstellar dust analogs can be directly released into the gas. This is known as chemical desorption which is caused by the excess energy of an exothermic reaction. This was first proposed as a key molecular release mechanism and can take place at any temperature. Researchers use silicate surfaces to model interstellar dust.
9 The two reactions which were the most exothermic were OD + D --> D2O and O + O --> O2 both with exothermic levels of 5.2. This relates to the fraction of the product released in the gas phase as how much heat was released from the reaction. It was concluded with experimental evidence that species which who form on the surface of interstellar dust grains can subsequently be released into the gas phase due to the exothermic its of the reaction. Through depositing O2 molecules on

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