Patent ID: 9038437
Filing Date: 2015-05-26
Classification: G01N

Abstract:
1. A chemical sensor comprising: a flexible membrane comprising a III/N heterojunction structure configured so as to form a two dimensional electron gas channel within said structure; and a sensing material disposed on at least part of said flexible membrane, the sensing material being sensitive to one or more target chemicals such that it would undergo a change in physical properties in the presence of said one or more target chemicals; wherein the sensing material is coupled to said heterojunction structure such that said change in physical properties of the sensing material would impart a change in stress within the heterojunction structure which would modulate the resistivity of the two dimensional electron gas channel, wherein the change in physical properties of the sensing material is a volume change due to absorption of the one or more target chemicals or a change in structure or amount of the sensing material due to absorption, dissolution, or both absorption and dissolution of the sensing material in the presence of the one or more target chemicals.