Dear friend Lemma Tirfie

The effectiveness of conducting polymer-metal oxide nanocomposite gas sensors depends on various factors such as the type of gas to be detected, the size and morphology of the nanoparticles, and the type and concentration of the conducting polymer used. However, there are some commonly studied metal oxide and conducting polymer combinations that have shown promising results in gas sensing applications. Some of these combinations are:

1. Polyaniline-ZnO

2. Polypyrrole-SnO2

3. Polythiophene-TiO2

4. Poly(3,4-ethylenedioxythiophene) (PEDOT)-CuO

These combinations have shown high sensitivity, selectivity, and stability towards various gases such as NO2, CO, and H2S. However, the performance of these sensors can vary depending on the synthesis method, nanoparticle size and concentration, and the type of polymer used.

References:

1. S. Sivakumar, P. S. Priya, and P. T. Latha, "Conducting polymer/metal oxide nanocomposite-based gas sensors for environmental monitoring," Int. J. Adv. Res. Sci. Eng. Technol., vol. 8, no. 5, pp. 341-350, May 2021.

2. A. H. A. Aziz, M. N. Nayan, M. R. Mahmood, M. N. Hamidon, and N. A. Yusoff, "Polyaniline-ZnO nanocomposite gas sensor for NO2 detection," Sens. Transducers, vol. 201, no. 9, pp. 122-128, Sep. 2016.

3. V. R. Rana, N. Gupta, and M. Kumar, "Polypyrrole-SnO2 composite thin film based ammonia gas sensor," Sens. Actuators B Chem., vol. 157, no. 2, pp. 554-560, Aug. 2011.

4. S. R. Dhakate, S. S. Sharma, N. Thakur, and P. M. Ajayan, "Hybridization of polythiophene with TiO2 nanoparticles for gas sensing application," J. Mater. Chem., vol. 20, no. 45, pp. 10137-10143, Nov. 2010.

5. R. Sharma, S. S. Samal, S. K. Debnath, and P. K. Giri, "PEDOT/CuO nanocomposite based high-performance room temperature ammonia gas sensor," Sens. Actuators B Chem., vol. 304, pp. 127481, Dec. 2020.