Figure 12: (A) Sensor devices from Sensor Group and Vietnamese researchers (N.V. Hieu & N.D. Hoa), International training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), Hanoi, Vietnam (Photo by N.V. Long).
(B) A system for characterization of sensing gas properties of Fe oxides to some typical gases, such as alcohols (Photo by N.V. Hieu & N.D. Hoa with permission).