Shanley, TW, Bonnie, F, Scott, J & Toth, M 2016, 'Role of gas molecule complexity in environmental electron microscopy and photoelectron yield spectroscopy.', ACS applied materials & interfaces, vol. 8, pp. 27305-27310.View/Download from: Publisher's site
Environmental scanning electron microscopy (ESEM) and environmental photoelectron yield spectroscopy (EPYS) enable electron imaging and spectroscopy of surfaces and interfaces in low vacuum, gaseous environments. The techniques are both appealing and limited by the range of gases that can be used to amplify electrons emitted from a sample, and used to form images/spectra. However, to date, only H2O and NH3 gases have been identified as highly favorable electron amplification media. Here we demonstrate that ethanol vapor (CH3CH2OH) is superior to both of these, and attribute its performance to molecular complexity and valence orbital structure. Our findings improve present understanding of what constitutes a favorable electron amplification gas, and will help expand the applicability and usefulness of the ESEM and EPYS techniques.
Bonnie, F, Arnold, MD, Smith, G & Gentle, AR 2013, 'Modes of interaction between nanostructured metal and a conducting mirror as a function of separation and incident polarization', Proc. SPIE 8818, Nanostructured Thin Films, Nanostructured Thin Films, SPIE, San Diego. USA, pp. 1-10.View/Download from: Publisher's site
The optical resonances that occur in nanostructured metal layers are modulated in thin film stacks if the nanostructured layer is separate from a reflecting conducting layer by various thickness of thin dielectric.