[1] B Somnath, R Aarts. Elektor Electronics Worldwide, 2, 90(2019).

[2] Y Liu, X Chen, Z Cai et al. Science China Earth Sciences, 11, 1622(2018).

[3] E Koukouli M, D Balis, I Zyrichidou et al. Atmospheric Research, 224, 42(2019).

[4] Y Fan, J Hang, X Ding et al. Building and Environment, 180, 107048(2020).

[5] L Wenling, X Ziping, Y Tianan. International Journal of Environmental Research & Public Health, 15, 1471(2018).

[6] X Tian, J Xu, P Xie et al. Environ. Sci., 71, 207(2018).

[7] B Dix, R Volkamer, T Koenig. Atmos. Meas. Tech., 9, 5655(2016).

[8] T Drosoglou, I Zyrichidou, A Bais et al. Atmos. Chem. Phys., 17, 5829(2017).

[9] S Beirle, Y Wang, J Lampel et al. Atmos. Chem. Phys., 17, 5007(2017).

[10] C Xing, C Liu, S Wang et al. Atmos. Meas. Tech., 12, 3289(2019).

[11] C Liu, C Xing et al. Sci. Total Environ., 715, 136258(2020).

[12] W Lin, J Jin, J Ma et al. Atmos. Environ., 133, 12(2016).

[13] J Lampel, Y Wang, P Xie et al. Atmos. Chem. Phys., 17, 2189(2017).

[15] X Tian, P Xie, J Xu et al. Atmos. Chem. Phys., 19, 3375(2019).

[16] S Naveed, M Khokhar, J Butt et al. Atmosphere, 7, 68(2016).

[17] C Liu, J Zeeshan, K Muhammad F et al. Remote Sens., 11, 1524(2019).

[18] S Wang, C Xing, C Liu et al. Atmos. Chem. Phys., 17, 14275(2017).