Recent Submissions

  • WATCH: WiFi in Active TV Channels 

    Zhang, Xu; Knightly, Edward W. (2015)
    Today's "white space" model of spectrum sharing applied in the UHF TV band allows channels that are not being used regionally by a TV broadcaster to be re-purposed for unlicensed-style secondary access in 24 hour increments. ...
  • Data Compression in Base Transceiver Systems 

    Vosoughi, Aida; Cavallaro, Joseph R.; Wu, Michael (2012-10)
  • Super-Resolution mbPAINT for Optical Localization of Single-Stranded DNA 

    Chen, Jixin; Bremauntz, Alberto; Kisley, Lydia; Shuang, Bo; Landes, Christy F. (2013)
    We demonstrate the application of superlocalization microscopy to identify sequence-specific portions of single-stranded DNA (ssDNA) with sequence resolution of 50 nucleotides, corresponding to a spatial resolution of 30 ...
  • Au Nanomatryoshkas as Efficient Near-Infrared Photothermal Transducers for Cancer Treatment: Benchmarking against Nanoshells 

    Ayala-Orozco, Ciceron; Urban, Cordula; Knight, Mark W.; Urban, Alexander Skyrme; Neumann, Oara; Bishnoi, Sandra W.; Mukherjee, Shaunak; Goodman, Amanda M.; Charron, Heather; Mitchell, Tamika; Shea, Martin; Roy, Ronita; Nanda, Sarmistha; Schiff, Rachel; Halas, Naomi J.; Joshi, Amit (2014)
    Au nanoparticles with plasmon resonances in the near-infrared (NIR) region of the spectrum efficiently convert light into heat, a property useful for the photothermal ablation of cancerous tumors subsequent to nanoparticle ...
  • High ionic strength narrows the population of sites participating in protein ion-exchange adsorption: A single-molecule study 

    Kisley, Lydia; Chen, Jixin; Mansur, Andrea P.; Dominguez-Medina, Sergio; Kulla, Eliona; Kang, Marci; Shuang, Bo; Kourentzi, Katerina; Poongavanam, Mohan-Vivekanandan; Dhamane, Sagar; Willson, Richard C.; Landes, Christy F. (2014)
    The retention and elution of proteins in ion-exchange chromatography is routinely controlled by adjusting the mobile phase salt concentration. It has repeatedly been observed, as judged from adsorption isotherms, that the ...
  • Extending single molecule fluorescence observation time by amplitude-modulated excitation 

    Kisley, Lydia; Chang, Wei-Shun; Cooper, David; Mansur, Andrea P.; Landes, Christy F. (2013)
    We present a hardware-based method that can improve single molecule fluorophore observation time by up to 1500% and super-localization by 47% for the experimental conditions used. The excitation was modulated using an ...
  • Integrating Cognitive Science and Technology Improves Learning in a STEM Classroom 

    Butler, Andrew C.; Marsh, Elizabeth J.; Slavinsky, J.P.; Baraniuk, Richard G. (2014)
    The most effective educational interventions often face significant barriers to widespread implementation because they are highly specific, resource intense, and/or comprehensive. We argue for an alternative approach to ...
  • Charge-Dependent Transport Switching of Single Molecular Ions in a Weak Polyelectrolyte Multilayer 

    Tauzin, Lawrence J.; Shuang, Bo; Kisley, Lydia; Mansur, Andrea P.; Chen, Jixin; de Leon, Al; Advincula, Rigoberto C.; Landes, Christy F. (2014)
    The tunable nature of weak polyelectrolyte multilayers makes them ideal candidates for drug loading and delivery, water filtration, and separations, yet the lateral transport of charged molecules in these systems remains ...
  • Quartz Enhanced Photoacoustic Spectroscopy Based Trace Gas Sensors Using Different Quartz Tuning Forks 

    Ma, Yufei; Yu, Guang; Zhang, Jingbo; Yu, Xin; Sun, Rui; Tittel, Frank K. (2015)
    A sensitive trace gas sensor platform based on quartz-enhanced photoacoustic spectroscopy (QEPAS) is reported. A 1.395 μm continuous wave (CW), distributed feedback pigtailed diode laser was used as the excitation source ...
  • Asymmetric excitation profiles in the resonance Raman response of armchair carbon nanotubes 

    Hároz, Erik H.; Duque, Juan G.; Barros, Eduardo B.; Telg, Hagen; Simpson, Jeffrey R.; Walker, Angela R. Hight; Khripin, Constantine Y.; Fagan, Jeffrey A.; Tu, Xiaomin; Zheng, Ming; Kono, Junichiro; Doorn, Stephen K. (2015)
    We performed tunable resonance Raman spectroscopy on samples highly enriched in the (5,5), (6,6), (7,7), and (8,8) armchair structures of metallic single-wall carbon nanotubes. We present Raman excitation profiles (REPs) ...
  • Tuning the acoustic frequency of a gold nanodisk through its adhesion layer 

    Chang, Wei-Shun; Wen, Fangfang; Chakraborty, Debadi; Su, Man-Nung; Zhang, Yue; Shuang, Bo; Nordlander, Peter; Sader, John E.; Halas, Naomi J.; Link, Stephan (2015)
    To fabricate robust metallic nanostructures with top-down patterning methods such as electron-beam lithography, an initial nanometer-scale layer of a second metal is deposited to promote adhesion of the metal of interest. ...
  • In Situ Diffraction Study of Catalytic Hydrogenation of VO2: Stable Phases and Origins of Metallicity 

    Filinchuk, Yaroslav; Tumanov, Nikolay A.; Ban, Voraksmy; Ji, Heng; Wei, Jiang; Swift, Michael W.; Nevidomskyy, Andriy H.; Natelson, Douglas (2014)
    Controlling electronic population through chemical doping is one way to tip the balance between competing phases in materials with strong electronic correlations. Vanadium dioxide exhibits a first-order phase transition ...
  • High-Ampacity Power Cables of Tightly-Packed and Aligned Carbon Nanotubes 

    Wang, Xuan; Behabtu, Natnael; Young, Colin C.; Tsentalovich, Dmitri E.; Pasquali, Matteo; Kono, Junichiro (2014)
    The current-carrying capacity (CCC), or ampacity, of highly-conductive, light, and strong carbon nanotube (CNT) fibers is characterized by measuring their failure current density (FCD) and continuous current rating (CCR) ...
  • Investigating irregularly patterned deep brain stimulation signal design using biophysical models 

    Summerson, Samantha R.; Aazhang, Behnaam; Kemere, Caleb (2015-06)
    Parkinson's disease (PD) is a neurodegenerative disorder which follows from cell loss of dopaminergic neurons in the substantia nigra pars compacta (SNc), a nucleus in the basal ganglia (BG). Deep brain stimulation (DBS) ...
  • Single-Particle Absorption Spectroscopy by Photothermal Contrast 

    Yorulmaz, Mustafa; Nizzero, Sara; Hoggard, Anneli; Wang, Lin-Yung; Cai, Yiyu; Su, Man-Nung; Chang, Wei-Shun; Link, Stephan (2015)
    Removing effects of sample heterogeneity through single-molecule and single-particle techniques has advanced many fields. While background free luminescence and scattering spectroscopy is widely used, recording the absorption ...
  • Quantum cascade laser-based multipass absorption system for hydrogen peroxide detection 

    Cao, Yingchun; Sanchez, Nancy P.; Jiang, Wenzhe; Ren, Wei; Lewicki, Rafal; Jiang, Dongfang; Griffin, Robert J.; Tittel, Frank K. (2015)
    Hydrogen peroxide (H2O2) is a relevant molecular trace gas species, that is related to the oxidative capacity of the atmosphere, the production of radical species such as OH, the generation of sulfate aerosol via oxidation ...
  • Aluminum Nanocrystals 

    McClain, Michael J.; Schlather, Andrea E.; Ringe, Emilie; King, Nicholas S.; Liu, Lifei; Manjavacas, Alejandro; Knight, Mark W.; Kumar, Ish; Whitmire, Kenton; Everitt, Henry O.; Nordlander, Peter; Halas, Naomi J. (2015)
    We demonstrate the facile synthesis of high purity aluminum nanocrystals over a range of controlled sizes from 70 to 220 nm diameter with size control achieved through a simple modification of solvent ratios in the reaction ...
  • Extraordinary sensitivity enhancement by metasurfaces in terahertz detection of antibiotics 

    Xie, Lijuan; Gao, Weilu; Shu, Jie; Ying, Yibin; Kono, Junichiro (2015)
    We have detected trace amounts of molecules of antibiotics (kanamycin sulfate) dispersed on metasurfaces with terahertz (THz) spectroscopy. Utilizing the extraordinary optical transmission resonance of an array of square-shaped ...
  • The Surprising in Vivo Instability of Near-IR-Absorbing Hollow Au-Ag Nanoshells 

    Goodman, Amanda M.; Cao, Yang; Urban, Cordula; Neumann, Oara; Ayala-Orozco, Ciceron; Knight, Mark W.; Joshi, Amit; Nordlander, Peter; Halas, Naomi J. (2014)
    Photothermal ablation based on resonant illumination of near-infrared-absorbing noble metal nanoparticles that have accumulated in tumors is a highly promising cancer therapy, currently in multiple clinical trials. A crucial ...
  • Troika of single particle tracking programing: SNR enhancement, particle identification, and mapping 

    Shuang, Bo; Chen, Jixin; Kisley, Lydia; Landes, Christy F. (2014)
    Single particle tracking (SPT) techniques provide a microscopic approach to probe in vivo and in vitro structure and reactions. Automatic analysis of SPT data with high efficiency and accuracy spurs the development of SPT ...

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