Bulletin of the American Physical Society
Annual Meeting of the APS Four Corners Section
Volume 60, Number 11
Friday–Saturday, October 16–17, 2015; Tempe, Arizona
Session B5: Materials I: Nanostructures |
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Chair: Molly McCartney, Arizona State University Room: MU220 |
Friday, October 16, 2015 10:50AM - 11:02AM |
B5.00001: Substrate Effects on the Electroplating of Carbon Nanotube Forests Berg Dodson, Dallin Barton, Guohai Chen, Marcus Finlinson, Richard Vanfleet, Robert Davis Metal electroplating of carbon nanotube forest is a new approach to fabricating metal MEMS devices. Recent success involves direct electrical connection to an interconnected CNT forest structure. Electrical connection through patterned leads on the substrate may allow better control in the metal fabrication process. This research focuses on the effects of using different metal substrates in the process of creating electroplated carbon nanotube structures. These structures are prepared by depositing a thin film of metal onto a silicon wafer by electron beam evaporation. Fabrication of the carbon nanotube structures involves photolithography, catalyst deposition, and CNT growth by CVD. The CNT growth is impacted by the choice of substrate. Electroplating takes place in a Ni(II)Cl solution. We will report on the current status and recent results. [Preview Abstract] |
Friday, October 16, 2015 11:02AM - 11:14AM |
B5.00002: Interpreting plasmonic response of epitaxial Ag/Si(100) island ensembles Dexin Kong, Liying Jiang, Jeff Drucker Associating features in the experimentally measured optical response of epitaxial Ag islands grown on Si(100) with the localized surface plasmon resonances (LSPR) hosted by the Ag islands is challenging due to the variation of the Si dielectric function over the energy range under consideration. However, it is possible to conclusively identify features in the experimental spectra with LSPR modes oscillating both // and \begin{figure}[htbp] \centerline{\includegraphics[width=0.11in,height=0.20in]{090920151.eps}} \label{fig1} \end{figure} $\bot $to the epitaxial interface by simulating the optical response. Using the Abeles matrix method and modeling the Ag islands using the thin island film model developed by Bedeaux and Vlieger that incorporates island morphology parameters determined by quantitative analysis of electron micrographs faithfully reproduces the main features of the experimental spectra. Individually zeroing the dipoles associated with the LSPR modes enables conclusive identification of their contribution to the optical response of the composite system. [Preview Abstract] |
Friday, October 16, 2015 11:14AM - 11:26AM |
B5.00003: Photoinduced Deposition of Gold Nanoparticles on Periodically Poled Lithium Niobate Veronica Meeks, Anna Zaniewski, Brandon Palafox, Robert Nemannich This research investigates gold (Au) nanoparticle deposition patterns on a ferroelectric substrate, periodically poled lithium niobate (PPLN). Particles are made by reducing aqueous solutions of metal salts on the PPLN surface with ultraviolet (UV) light stimulation to create the photo-induced deposition patterns. A wide array of concentrations are examined ranging from 2E-8M to 1E-3M of gold solution. The results show that the deposition patterns are highly dependent upon concentration, but in all cases, the patterns consist of discrete nanoparticles. Previous work on silver deposition on PPLN has resulted in continuous silver nanowires, implying that this technique should be extendable to gold nanowires. Gold nanowires would have a number of advantages over silver nanowires, given gold's superior conductivity and chemical stability. [Preview Abstract] |
Friday, October 16, 2015 11:26AM - 11:50AM |
B5.00004: Extreme ultraviolet photonics on a table-top Invited Speaker: Carmen Menoni With wavelengths of a few to tens of nanometers extreme ultraviolet (EUV) light is being exploited in a rapidly increasing number of scientific and technological applications, from imaging to spectroscopy, to the lithography of semiconductor chips with 13.5 nm wavelength light. Recent advances in the generation of bright EUV/SXR laser beams on a table top are opening unique opportunities to advance photonics in this challenging and relatively unexplored region of the electromagnetic spectrum. This talk will describe results of efforts at Colorado State University on the generation and utilization of EUV/SXR lasers for nanoscale structural and molecular imaging. These photonic applications are making possible the imaging of nanostructures and their dynamics, and the three dimensional nanoscale mapping of the chemical composition of single cells providing new opportunities to access and probe the nanoworld. [Preview Abstract] |
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