SGECM potentiometric measurements are developed with a novel Ag/AgCl-gel micro-reference electrode. The electrode is prepared by electrodeposition of chitosan on Ag micro-disk electrode followed by anodic chlorination of Ag. It is approached to the sample by shear force feedback, and the potential between the electrode and the sample is recorded with a highly sensitive voltammeter. Based on this, simultaneous mapping of topography and electrochemical potential is achieved, with the sample exposed in air. Tests of model samples indicate that the electrode is reliable and stable for potentiometry, and two different metals (Al and Cu) are clearly identified from the topography and potential maps.

SGECM电位测量是使用新型Ag / AgCl-gel微参比电极开发的。该电极是通过将壳聚糖电沉积在Ag微盘电极上，然后对Ag进行阳极氯化而制备的。通过剪切力反馈使其接近样品，并使用高灵敏度的伏安计记录电极和样品之间的电势。基于此，可以将样品暴露在空气中，同时绘制形貌和电化学势。对模型样品的测试表明，该电极对于电位计是可靠且稳定的，并且从形貌和电势图中可以清楚地识别出两种不同的金属（Al和Cu）。