Biocompatibility of Te–As–Se glass fibers for cell-based bio-optic infrared sensors

Authors

Allison A. Wilhelm, University of Arizona, Tucson, Arizona
Pierre Lucas, University of Arizona, Tucson, ArizonaFollow
Diana L. DeRosa, University of Arizona, Tucson, Arizona
Mark R. Riley, University of Nebraska-LincolnFollow

Date of this Version

2007

Citation

J. Mater. Res., Vol. 22, No. 4, Apr 2007

Comments

© 2007 Materials Research Society

Abstract

The chemical stability and toxicity of Te–As–Se (TAS) infrared fibers are investigated. These fibers are used for biosensing applications that involve direct contact with live cultivated human cells. It is shown that TAS fibers exhibit a small oxidation layer after extended exposure to air. This layer is highly soluble in water and easily removed. However, the TAS glass itself is stable in water over several days. While oxidized fibers release arsenate ions, which result in toxic effects to the cells, fresh or washed fibers show no toxic effects. A good correlation is shown between surface etching and the disappearance of toxicity.