In situ TEM studies of local transport and structure in nanoscale multilayer films.
This paper describes a novel technique for studying structure-transport correlations in nanoscale multilayer thin films. Here, local current-voltage characteristics from simplified magnetic tunnel junctions are measured in situ on cross-sectional transmission electron microscopy (TEM) samples and correlated directly with TEM images of the microstructure at the tunneling site. It is found that local variations in barrier properties can be detected by a point probe method, and that the tunneling barrier height and width can be extracted.
A method and apparatus for the localized delivery of a therapeutic agent reduces the damage to the myocardial tissue due to ischemia. Topical delivery apparatus used to deliver therapeutic agents to the coronary arteries that supply nutrients to the ischemic tissue. According to one embodiment, the implantable medical device for delivering insulin to the local myocardial tissue comprises a biocompatible polymer in a therapeutic dose of insulin in the fixed to the stent. Insulin for therapeutic dosage is released from the stent by the therapeutic administration over a dose effective administration period to reduce ischemic injury in myocardial tissue.