Steerpike_jhb wrote:You can grow polycrystalline films of diamond with an oxy-acelylene flame. That might be an option: you'd just have to find a suitable, and suitably shaped substrate.
Nice idea. Lets say we could make a substrate of the right shape. Even if we could then deposit a layer of diamond, I don't think it could be a viable stylus. I think it has to be solid diamond to conduct heat away (small as it is) from the contact region. Otherwise it would wear. Only solid diamond can do it, it has exceptional thermal conductivity. Or perhaps a substrate with high thermal conductivity might be OK, if the diamond layer was thick enough.
Hey, that's my 4000th post here !