SECM(cont'd CwR◆W-100n( diam) Determines resolution ◆2 nm best at present Sample ◆ Conducting ◆ Insulator Mineral ◆ Biological Sample ◆ SemiconductorSECM (cont’d)  W - 100 nm (diam.)  Determines resolution  2 nm best at present  Sample  Conducting  Insulator  Mineral  Biological  Semiconductor Sample C W R