Adsorption of formaldehyde (HCOH) molecule on the SiC sheet: A first-principles study

► The C atom of the SiC sheet is the active adsorption site compared with the Si site. ► Adsorption of HCOH molecule could affect the electronic properties of the SiC sheet by strong interactions. ► The SiC sheet is expected to be a novel sensor to detect HCOH gas.