A ppb-level formaldehyde gas sensor based on CuO nanocubes prepared using a polyol process

Effect of Au nanoparticle size on the gas-sensing performance of p-CuO nanowires

“…The metal-oxide semiconductor is a suitable material system that can detect traces of gaseous species at a concentration in the order of single parts per billion. In recent years, various p-type metaloxide materials, such as NiO, Co 3 O 4 , CuO, and Cr 2 O 3 , have been used as the basis sensor materials for gas sensors [3][4][5][6]. Among them, p-type CuO has emerged as the most promising candidate [7][8][9][10][11].…”

A ppb-Level Formaldehyde Gas Sensor Based on Rose-Like Nickel Oxide Nanoparticles Prepared Using Electrodeposition Process

“…The response of the NiO nanorose-based sensor is greatly higher that of other NiO-based sensors such as NiO thin¯lms (S % 2 with 1000 ppb formaldehyde), 34 NiO-doped SnO 2 nano¯bers (S % 1.85 with 5 ppm formaldehyde) 40 and the gas sensors based on CuO nanocubes(S % 1.15 with 800 ppb formaldehyde). 41 This result suggests that the enhanced response of the NiO°ower sensor do emanate from the increase in surface area. Furthermore, the response of 200-1000 ppb in Fig.…”

Nanocomposite sensors of propylene glycol, dimethylformamide and formaldehyde vapors

“…However, FA gas sensors, which are based on metal-oxide materials, have benefits that are mentioned above. Meanwhile, pure metal oxide structures react on FA at higher operating temperatures (300-400 • C) (Xu et al, 2014;Park et al, 2014) or room temperature with the assistance of UV LEDs (Chung et al, 2014;Li et al, 2015). Nanomaterials, such as carbon nanotubes (CNTs), metaloxide nanoparticles, nanotubes, nanowires and other various nanopattern formations are widely used in gas sensing structures due to their excellent responsive characteristics, mature preparation technology and low cost of mass production (Aroutiounian, 2015;Arafat et al, 2012;Korotcenkov et al, 2009;Aroutiounian et al, 2013;Feyzabad et al, 2012;Hieu et al, 2008).…”