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. 2021 Feb 9;7:15. doi: 10.1038/s41378-021-00239-0

Fig. 2. Experimental results of spray-coated electret with nanoparticles (Sample 5).

Fig. 2

a Surface potential distribution of Sample 5 after corona charging, b surface potential decay over 500 days, and c open-circuit TSD current spectra of Sample 5