Fig. 4: Time-dependence of depolymerization within and outside of the scanned area at the HA–graphite interface at [TPBA] = 250 μM. | Communications Chemistry

Fig. 4: Time-dependence of depolymerization within and outside of the scanned area at the HA–graphite interface at [TPBA] = 250 μM.

From: Deciphering the factors influencing electric field mediated polymerization and depolymerization at the solution–solid interface

Fig. 4

a Relatively large scale STM image showing domains of 2DP within the scanned area (100 × 100 nm2, scale bar = 20 nm). b Smaller scan within the highlighted area in (a) immediately after switching the sample bias from negative to positive. b–g Sequential STM images obtained in the same general area as (a) showing the local depolymerization process (50 × 50 nm2, scale bar = 10 nm). h A larger scale image obtained after zooming out from (g) shows the locally depolymerized region (white square). The region outside of the scanned area still shows the presence of 2DP (100 × 100 nm2, scale bar = 20 nm). Imaging conditions: Iset = 0.1 nA, Vbias = –0.7 V or +0.7 V. Similar local depolymerization was also observed when OA was used as the solvent (see Fig. S8 in the Supplementary information).

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