One application might help build better electronics. Electronics manufacturers such as Nitronex Corporation, which donated the piezoelectric materials used in the study, make devices grown out of gallium nitride (GaN) and aluminum nitride (AlN), which are grown on a substrate and consist of layers of very thin films.
Chin(noun) the lower extremity of the face below the mouth; the point of the under jaw. Chin(noun) the exterior or under surface embraced between the branches of the lower jaw bone, in birds.
The expression dates from the early part of the 19th century. keep oneâs chin up To maintain oneâs courage and resolve, to keep oneâs spirits up, to keep oneâs head held high. This American expression has been in use since at least 1938. Keep your chin up honey.