Browsing Physics Faculty Research and Publications by Published Date "2013"

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Browsing Physics Faculty Research and Publications by Published Date "2013"

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  • Rice, Reginald H.; Gnecco, Enrico; Wannemacher, Reinhold; Szoszkiewicz, Robert (2013-06-21)
    We demonstrate how the wear response of a polymer surface can be effi ciently characterized by atomic force microscopy (AFM) using a spiral scan with a thermal tip. If the spiral is scanned at constant angular speed in the ...
  • Hu, Dehui; Rebello, N. Sanjay (2013-11-12)
    Calculus is used across many physics topics from introductory to upper-division courses. The fundamental concepts of differentiation and integration are important tools for solving real-world problems involving nonuniformly ...
  • Hu, Dehui; Rebello, N. Sanjay (2013-07-26)
    This study focuses on students’ use of the mathematical concept of differentials in physics problem solving. For instance, in electrostatics, students need to set up an integral to find the electric field due to a charged ...
  • Irving, Paul W.; Martinuk, Mathew Sandy; Sayre, Eleanor C. (2013-04-04)
    We use epistemological framing to interpret participants’ behavior during group problem-solving sessions in an intermediate mechanics course. We are interested in how students frame discussion and in how the groups shift ...
  • Wu, J.; Magrakvelidze, Maia; Vredenborg, A.; Schmidt, L. Ph. H.; Jahnke, T.; Czasch, A.; Dörner, R.; Thumm, Uwe P. E. (2013-01-18)
    We demonstrate that the vibrational nuclear motion of singly ionized argon dimers can be controlled with two ultrashort laser pulses of different wavelengths. In particular, we observe a striking ‘‘gap’’ in the ...
  • Szoszkiewicz, Robert (2013-04-01)
    Disulfide bond reduction pathways used by human thioredoxin (hTrx) are studied at the single molecule level using a recombinant protein (I27[subscript SS])[subscript 8]. (I27[subscript SS])[subscript 8] contains eight ...
  • Ibrahim, Bashirah; Rebello, N. Sanjay (2013-09-16)
    In this paper, we report on a project concerned with the role of cognition during problem solving. We specifically explore the categories of mental representations that students work with during problem solving of different ...
  • Le, Anh-Thu; Lucchese, R. R.; Lin, Chii Dong (2013-06-07)
    We report applications of the quantitative rescattering theory (QRS) for calculation of high-order-harmonic generation (HHG) from polyatomic molecules in ultrashort linearly polarized intense laser pulses, using the example ...
  • Sorensen, Christopher M. (2013-12-01)
    This review describes and demonstrates the Q-space analysis of light scattering by particles. This analysis involves plotting the scattered intensity versus the scattering wave vector q = (4π/λ) sin(θ/2) on a double log ...
  • Lupetti, Mattia; Kling, Matthias F.; Scrinzi, Armin (2013-05-31)
    A compact high repetition rate attosecond light source based on a standard laser oscillator combined with plasmonic enhancement is analyzed. At repetition rates of tens of MHz, we predict focusable pulses with durations ...
  • Morishita, Toru; Lin, Chii Dong (2013-06-06)
    We calculated photoelectron energy and momentum spectra and the population of high Rydberg states of lithium atoms by intense 785 nm laser pulses at intensities in the over-the-barrier ionization (OBI) regime. The calculated ...
  • Nepal, Arjun; Singh, Gajendra P.; Flanders, Bret N.; Sorensen, Christopher M. (2013-05-20)
    A one-step, gas-phase, catalyst-free detonation of hydrocarbon (C[subscript 2]H[subscript 2]) method was developed to produce gram quantities of pristine graphene nanosheets (GNs). The detonation of C[subscript 2]H[subscript ...
  • Kübel, M.; Kling, Nora G.; Betsch, Kelsie J.; Camus, N.; Kaldun, A.; Kleineberg, U.; Ben-Itzhak, Itzik; Jones, R. R.; Paulus, G. G.; Pfeifer, T.; Ullrich, J.; Moshammer, R.; Kling, Matthias F.; Bergues, B. (2013-08-22)
    We present a comparative study of nonsequential double ionization (NSDI) of N[subscript 2] and Ar exposed to near-single-cycle laser pulses. The NSDI process is investigated using carrier-envelope-phase-tagged electron-ion ...
  • Pavlov, Anatoly; Westmoreland, Shawn; Saaidi, Khaled; Ratra, Bharat V. (2014-02-18)
    We generalize the time-variable dark energy scalar field Φ model (ΦCDM) to nonflat space. We show that even in the space-curvature-dominated epoch the scalar field solution is a time-dependent fixed point or attractor, ...
  • Ploscariu, Nicoleta; Szoszkiewicz, Robert (2014-03-05)
    We postulate that one will be able to quantitatively infer changes in the mechanical properties of proteins, cells, and other biological objects (BO) by measuring the shifts of several thermally excited resonance frequencies ...
  • Lomsadze, Bachana; Fehrenbach, Charles W.; DePaola, Brett D. (2013-05-06)
    Direct frequency comb spectroscopy is currently one of the most precise techniques for studying the internal structure of atomic and molecular systems. In this technique, a train of ultrafast laser pulses excites states ...
  • Mulholland, George W.; Zhou, Lei; Zachariah, Michael R.; Heinson, William R.; Chakrabarti, Amit; Sorensen, Christopher M. (2013-02-13)
    Motivated by light scattering experiments showing enhanced intensity of electric field aligned nano-agglomerates vs. randomly oriented nano-agglomerates, we address the theoretical basis for this effect by applying the ...
  • Schmit, Jeremy D. (2013-05-14)
    The growth of amyloid fibrils requires a disordered or partially unfolded protein to bind to the fibril and adapt the same conformation and alignment established by the fibril template. Since the H-bonds stabilizing the ...
  • Berg, Matthew J.; Sorensen, Christopher M. (2013-11-08)
    This work uses the discrete dipole approximation (DDA) to examine the internal electric field within a simulated carbon soot fractal aggregate in fixed and random orientations. For fixed orientations, deviations of the ...
  • Obreshkov, Boyan; Thumm, Uwe P. E. (2013-02-22)
    We theoretically investigate the electron transfer dynamics during the reflection of hydrogen atoms on an Al(100) surface for a wide range of collision energies below 6 keV. We find a nonmonotonic variation of the ...

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