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Growth process

How a “growth process” nanoworkshop works?

The growth of nanotubes or nanowires is obtained by chemical vapor deposition in a confined reactor. The break down of the substrate (preparation) may disperse a few particles. Some characterization techniques can damage the sample. The daily cleaning is done with the reactor closed, but some maintenance with the reactor open are needed each year. The particles/substrate liaison of the samples is high (low risk of inhalation) provided shocks, destruction, or contacts are avoided. The operations of transfert of samples are therefore done with shields and their destruction are made with waste elimination.

What open maintenance precautions to take?

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Maintenance with the reactor open.

During opening of the reactors, cartridge respirator masks must be worn due to possible traces of gas. Furthermore, the room where the reaction chamber is located is cleared and signs are put in place to indicate that an open maintenance operation is currently underway. The maintenance consists in opening, dismantling and cleaning the chamber where the growth reaction takes place.

The other operations (adjustment, cleaning, and handling) are performed with a dust mask, gloves, safety goggles and a lab coat.