A method and apparatus for automatically and dynamically generating a user interface for a client based upon a database model. The housing has a front side and a back side, the latter being slid into the equipment rack first upon installation. The SERS structure may be cooled to facilitate condensation of selected analytes onto the SERS structure. The present method also enables each direction of a bi-directional media channel to be controlled independent of the media channel in the opposite direction. Also provided are films made from these precursors and objects comprising these films.