Basic Information
Abstract Number: 990-5    
Author Name: Bruce Chase Affiliation: University of Delaware
Session Title: Analytical Applications of Broadly Tunable Lasers
Event Type: Organized Contributed Session
Event Title: Structure and Orientation in Electrospun Nanofibers
Presider(s): Crocombe, Richard A Start Time: 09:35 AM ( Slot # 6 )
Date: Tuesday, March 13th, 2012 Location: 308A
Keywords: Infrared and Raman, Polymers & Plastics

Prater, CraigAnasys

Abstract Content
The development of readily available, reliable pulsed lasers has started to have an impact in infrared spectroscopy. One particular application, embodied in the nanoIR instrument from Anasys, couples pulsed infrared excitation with AFM to provide infrared spectra at sub diffraction limited spatial resolution. Electrospun fibers provide a particular challenge for molecular level characterization of structure and orientation, due to their small sizes. With individual fiber diameters ranging from 5 microns down to 100 nm, they are below the diffraction limit for conventional infrared and Raman measurements. The ability to obtain polarized infrared spectra on individual fibers with diameters of hundreds of nm allows us to characterize both conformational state and chain orientation without the need for macroscopic alignment of fiber bundles. The capabilities of this approach for characterization of electrospun nanofibers will be illustrated.