A scanning tunneling microscope(stm) is an instrument for imaging surfaces at the atomic level. For an stm, good resolution is considered to be 0.1 nm lateral resolution and 0.01 nm depth resolution. With this resolution, individual atoms within materials are routinely imaged and manipulated. The stm can be used not only in ultra-high vacuum but also in air, water, and various other liquid or gas ambients.Technical specifications:scanning range: 1m maximum z-range: 1mderive resolution z: 0.015 nmderive resolution xy: 0.015 nmimaging modes: constant current (topography, constant height (current)sample size: max 20 mm diameter.Special features:expandable to suit user needsunique priceperformance ratio for research and teachingmechanical stabilityergonomic designeasy maintenance