Fig. 1
From: A Highly Sensitive and Room Temperature CNTs/SnO2/CuO Sensor for H2S Gas Sensing Applications

Schematics of a top view of gas sensor and b stereogram of gas sensor
From: A Highly Sensitive and Room Temperature CNTs/SnO2/CuO Sensor for H2S Gas Sensing Applications
Schematics of a top view of gas sensor and b stereogram of gas sensor