Abstract: A method for the manufacture of an improved graphene substrate and applications therefor There is provided a method (100) for the manufacture of an electronic device precursor, the method comprising: (i) providing a silicon wafer (200) having a growth surface (205); (ii) forming (105) an insulative layer (210) on the growth surface (205) having a thickness of from 1 nm to 10 nm, preferably 2 nm to 1 nm; (iii) forming (110) a graphene monolayer or multi-layer structure (215) on the insulative layer (210); (iv) optionally forming (115, 120) one or more further layers (220) and/or electrical contacts (225, 230) on the graphene monolayer or multi-layer structure (215); (v) forming (125) a polymer coating (235) over the graphene monolayer or multi-layer structure (215) and any further layers (115) and/or electrical contacts (225, 230); (vi) thinning (130) the silicon wafer (200), or removing the silicon wafer (200) to provide an exposed surface of the insulative layer (210), by etching with an etchant, wherein the

Abstract: A system for diffusing and directing the light from lightweight, portable, photographic light sources that is inflatable, flexible, and lightweight, and has two separate layers of translucent diffusion material (105 and 106) and has sides (102) of an opaque material. The two layers of diffusion material may diffuse the light to different degrees. It can be rapidly mounted to or removed from the light source (118), and is designed in such a way as to be readily fitted with an external light-directing device (120). It can be inflated quickly and it can also deflated and stowed conveniently and rapidly.