▎ 摘　　要

NOVELTY - The heterostructured composite has reduced graphene oxide (rGO) and zinc oxide (ZnO) decorated with gold nanoparticles or with a thin gold film. Substantially flat hexagonal formations include ZnO hexagonal sheets. The substantially flat formations include ZnO have a diameter ranging from 500-900 nm (nanometer), a length on each side of about 250 to 500 nm and a thickness ranging from 25 to 100 nm. The substantially flat hexagonal formations included ZnO have a diameter of about 680-752 nm, a length on each side of about 357-395 nm and a thickness of 59 to 65 nm. USE - Heterostructured composite for hydrogen sensor (claimed) for accurate monitoring and detection of hydrogen gas for industrial and domestic applications. ADVANTAGE - Heterostructured composite reduces the operating temperature but also enhances the gas sensing response of the sensor. DETAILED DESCRIPTION - INDEPENDENT CLAIM are included for: (1) a method of detecting and/or quantifying hydrogen gas in a sample; (2) method for making the heterostructured composite;