Water-soluble non-polymeric electrospun cyclodextrin nanofiber template for the synthesis of metal oxide tubes by atomic layer deposition
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/26537
- Research Paper 
Royal Society of Chemistry
We report on the suitability of water-soluble non-polymeric electrospun cyclodextrin (CD) nanofiber templates by using atomic layer deposition (ALD) to yield metal oxide tubes. To demonstrate this, water-soluble electrospun CD nanofibers were chosen as template to produce metal oxide tubes where we have tested two examples of ALD coatings, namely, Al<inf>2</inf>O<inf>3</inf> and ZnO. After the ALD coating on the CD nanofibers, the CD core is simply dissolved in water to yield metal oxide tubes. Morphological investigations suggested that Al<inf>2</inf>O<inf>3</inf> is smoother in contrast to ZnO which shows a grainy structure. Structural characterization evidenced amorphous Al<inf>2</inf>O<inf>3</inf> and highly crystalline ZnO. Given the applicability of Al<inf>2</inf>O<inf>3</inf> and ZnO in various contexts the ionic states of Al, Zn and O are also investigated. After the washing step to remove the CD core, Al<inf>2</inf>O<inf>3</inf> developed some hydroxylation, while ZnO hosts various oxygen related functional groups. © The Royal Society of Chemistry 2014.