Ultraclean room

Ultraclean room A high-efficiency clean room used in surgical operations. 

A radiation-induced grafting technique has been commercialized for the production of ion-exchange membranes as separators of batteries, hydrophilized hollow-fiber membranes for microfiltration of protein solutions, and ion-exchange nonwoven fabric for the removal of trace amounts of gases from ultraclean rooms [1,2]. 

The clean laboratory for trace metals was divided into three areas entrance laboratory (with clothes changing annex), instrument laboratory, and ultraclean sample preparation laboratory, all under positive pressure with active charcoal filtered air. Personnel using the clean rooms were required to wear hair caps, polyethylene gloves, laboratory coats, and designated shoes. These items are worn only in the clean rooms. 

The HBDC molecules were deposited in UHV on an ultraclean Cu(100) surface using sublimation rate of 0.09 nm/min, at 350 °C [9]. At full monolayer coverage, the molecules form a regular two-dimensional van der Waals crystal [9], which freezes any motion of the molecules even at room temperature (Fig. 4). As a consequence, each molecule in the lattice can be imaged by STM with clear intramolecular contrast. Each molecule displays six lobes arranged in a hexagonal pattern. The distance between the lobes alternates between 0.6 and 0.8 nm, which corresponds well with the alternate... 

An alternative to an entire space being ultraclean is to provide ultraclean chambers within a clean room (e.g., class 100 chambers in a class 10,000 room). This is feasible when a product requires the class 100 conditions for only a few operations along the entire assembly Une. 

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