Abstract: Titanium dioxide (TiO2) forms the basis of devices for applications including sensing devices, solar cells, photo-electrochromics, and photocatalysis. Such devices exploit different phases of TiO2 within such devices and accordingly it would be beneficial to have an amorphous TiO2 precursor which allows crystalline phase spatial patterning, for the crystallization of the amorphous TiO2 precursor to be triggered at low energies, and with the crystalline phase controllable at room-temperature without necessitating complex handling whilst providing TiO2 phases that ate stable over a prolonged period of time. Accordingly, there ate provided processes for providing a TiO2 precursor and controlling the conversion of the TiO2 precursor from amorphous-to-anatase, amorphous-to-rutile, amorphous-to-mixture of anatase/rutile or from amorphous-to-anatase-to-rutile in a simple and efficient manner.

Abstract: An insulated panel unit for connecting with structural elements of a building to at least partially form an envelope of said building is provided. The insulated panel unit includes a front panel adapted to cooperate with the structural elements of the building for positioning and connecting the panel unit in relation therewith, and at least one member having insulating properties secured to the front panel. A building envelope comprising panel units mounted on structural elements of a corresponding building is also provided.