Disclosed are acrylamide hydrogels prepared from derivatives of methyl- and methyl-acrylamide, methods of making the same, and methods of wound healing or tissue generation with acrylamide hydrogels. The touch signal accessing method of the touch device includes the following steps. A region of the amorphous silicon layer is vertically aligned with the lateral spacing between the source and drain electrodes defining the transistor channel, and the region of the amorphous silicon layer has a thickness of less than 100 nm, and is doped with phosphorus atoms with a doping density of between 2. Increased user traffic is expected at the first website since a user’s shopping interests can be fulfilled at a single website.