Aortic Valve Reconstruction With Autologous Glutaraldehyde-Treated Pericardium

Abstract

A new type of scanning tunneling microscope (STM) has been developed by the combination of several equivalent x-y-z piezoelements into one compact operation unit. Surface scanning as well as sample manipulation can be carried out simultaneously and independently in any desired direction. High stability operation is achieved by temperature compensation and rigid construction in order to reduce the influence of drift and vibration. Low voltage operation, easy sample mounting and free access for other surface analysis tools render the application possible also for normally skilled users. © 1987.