Band Offsets of the MOCVD-Grown β-(AlGa)O/β-GaO (010) Heterojunction.

The band offsets for the β-(AlGa)O/β-GaO (010) heterojunction have been experimentally measured by X-ray photoelectron spectroscopy. High-quality β-(AlGa)O films were grown by metal-organic chemical vapor deposition for characterization. The indirect band gap of β-(AlGa)O was determined by optical transmission to be 4.

Physicochemical characteristics of pristine and functionalized graphene.

Graphene-based nanomaterials have received significant attention in the last decade due to their interesting properties. Its electrical and thermal conductivity and strength make graphene well suited for a variety of applications, particularly for use as a composite material in plastics. Furthermore, much work is taking place to utilize graphene as a biomaterial for uses such as drug delivery and tissue regeneration scaffolds.

Adhesive force between graphene nanoscale flakes and living biological cells.

We report on a measurement technique that quantifies the adhesive force between multi-layers of graphene flakes and the cell wall of live Escherichia coli cells using atomic force microscopy (AFM) in-fluid Peak Force- Quantitative Nanomechanical Mapping mode. To measure the adhesive force, we made use of the negative charge of E. coli cells to allow them to stick to positively charged surfaces, such as glass or silicon, that were covered by poly-L-Lysine.