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Figure 2 | Nanoscale Research Letters

Figure 2

From: Intensify the application of ZnO-based nanodevices in humid environment: O2/H2 plasma suppressed the spontaneous reaction of amorphous ZnO nanowires

Figure 2

The spontaneous reaction mechanism of a-ZnO NBs is illustrated. (a) A uniform c-ZnO NWs (dark green rod) placed in the moisture environment surrounded by H2O molecules (light blue bubbles). The c-ZnO NW has uniform ZnO concentration which can be seen from the inset (ZnO concentration versus radius). (b) After H2O molecules absorbed at the surface of c-ZnO NWs, the Zn2+ ions would be dissolved from the surface of c-ZnO NWs and became aqueous solution diffused away from the c-ZnO NWs. When the Zn2+ ions and the ZnO NBs start to segregate out from the moisture solution and cause to grow from the main body of the original ZnO NWs, respectively (inset). (c, d) The surface potential was measured before and after moisture treatment.

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