An extremely thin profile filter is sized and configured to be installed between tubing couplers of an automotive air conditioning system in regions of an engine compartment that are cramped or otherwise will not accommodate a longer in-line filter. Embodiments of the present invention also provide methods for passivating graphene nanoelectronic devices, which enable stacking of multiple graphene devices and the creation of high density graphene based circuits. The first light exit surface has a transmissive region and a total reflection region. At least one cable is provided having a first end and a second end. A memory cell is coupled to the word line one line, the word line two line and a common bit line of the first and second subsets of bit lines.