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  • American Institute of Physics (AIP)  (14,366)
  • 2010-2014  (14,366)
  • 2013  (14,366)
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  • 2010-2014  (14,366)
Year
  • 1
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    Erratum: “On the mechanism of electrochemical modulation of plasmonic resonances” [Appl. Phys. Lett. 101, 121109 (2012)] (2013)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2013-12-31
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 2
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    Phase behavior of oscillating double droplets (2013)
    American Institute of Physics (AIP)
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    Publication Date: 2013-12-31
    Description: Double droplet systems are comprised of two coupled spherical interfaces. These systems are effective harmonic oscillators, due to their low dissipation and fast response; features enabled by their pinned contact lines. Here, millimeter scale coupled droplets of water are actuated with a sinusoidal driving pressure. The phase and transient behavior of the driven double droplet system is characterized. With the exact position of the double droplets determined, implementation of devices such as tunable lenses, thermal switches, and liquid adhesion mechanisms can be realized.
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  • 3
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    Improving chemical vapor deposition graphene conductivity using molybdenum trioxide: An in-situ field effect transistor study (2013)
    American Institute of Physics (AIP)
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    Publication Date: 2013-12-31
    Description: By using in situ field effect transistor characterization integrated with molecular beam epitaxy technique, we demonstrate the strong surface transfer p-type doping effect of single layer chemical vapor deposition (CVD) graphene, through the surface functionalization of molybdenum trioxide (MoO 3 ) layer. After doping, both the hole and electron mobility of CVD graphene are nearly retained, resulting in significant enhancement of graphene conductivity. With coating of 10 nm MoO 3 , the conductivity of CVD graphene can be increased by about 7 times, showing promising application for graphene based electronics and transparent, conducting, and flexible electrodes.
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  • 4
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    Atomic layer deposition of platinum with enhanced nucleation and coalescence by trimethylaluminum pre-pulsing (2013)
    American Institute of Physics (AIP)
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    Publication Date: 2013-12-31
    Description: Conformal coating of metal layers on three-dimensional structures is essential for advanced electronic devices such as storage elements, transistors, and sensors. The quality of atomic layer deposited platinum on oxide surfaces was enhanced by adding pre-deposition pulses of trimethylaluminum (TMA) for improved wetting. With an optimal number of TMA pre-pulses, a 6 nm thick Pt film was perfectly coalesced in contrast to only Pt island formation without TMA pre-pulses. A Pt gate all around Ge/Si nanowire field effect transistor was realized highlighting the potential of this approach for efficient deposition of Pt on 3D nanoelectronic devices.
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  • 5
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    Tunable metamaterials based on voltage controlled strong coupling (2013)
    American Institute of Physics (AIP)
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    Publication Date: 2013-12-31
    Description: We present the design, fabrication, and realization of an electrically tunable metamaterial operating in the mid-infrared spectral range. Our devices combine intersubband transitions in semiconductor quantum-wells with planar metamaterials and operate in the strong light-matter coupling regime. The resonance frequency of the intersubband transition can be controlled by an external bias relative to the fixed metamaterial resonance. This allows us to switch dynamically from an uncoupled to a strongly coupled system and thereby to shift the eigenfrequency of the upper polariton branch by 2.5 THz (corresponding to 8% of the center frequency or one full linewidth) with a bias of 5 V.
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  • 6
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    A method to measure nanomechanical properties of biological objects (2013)
    American Institute of Physics (AIP)
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    Publication Date: 2013-12-31
    Description: 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 of atomic force microscopy cantilevers in contact with BOs. Here, we provide a method to extract spring constants and molecular damping factors of BOs in biologically relevant phosphate buffered saline medium and using compliant AFM cantilevers with a small aspect ratio (a ratio of length to width).
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  • 7
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    A microelectromechanical system for thermomechanical testing of nanostructures (2013)
    American Institute of Physics (AIP)
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    Publication Date: 2013-12-31
    Description: We report an integrated microelectromechanical system (MEMS) with an on-chip heater for in-situ mechanical testing of nanostructures from room to elevated temperatures. Multiphysics simulation is used to predict the temperature distribution in air and vacuum conditions. The temperature simulation in air agrees well with the measurement based on Raman spectroscopy. Mechanical testing of single crystalline silicon nanowires is carried out to investigate the brittle-to-ductile transition, demonstrating the efficacy of the MEMS stage. The stage reported here could be applied to investigate the temperature effect on mechanical properties at the nanoscale.
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  • 8
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    SiGe quantum dots for fast hole spin Rabi oscillations (2013)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2013-12-31
    Description: We report on hole g-factor measurements in three terminal SiGe self-assembled quantum dot devices with a top gate electrode positioned very close to the nanostructure. Measurements of both the perpendicular as well as the parallel g-factor reveal significant changes for a small modulation of the top gate voltage. From the observed modulations, we estimate that, for realistic experimental conditions, hole spins can be electrically manipulated with Rabi frequencies in the order of 100 MHz. This work emphasises the potential of hole-based nano-devices for efficient spin manipulation by means of the g-tensor modulation technique.
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  • 9
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    Nanoscale structural evolution of electrically driven insulator to metal transition in vanadium dioxide (2013)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2013-12-31
    Description: The structural evolution of tensile strained vanadium dioxide thin films was examined across the electrically driven insulator-to-metal transition by nanoscale hard X-ray diffraction. A metallic filament with rutile (R) structure was found to be the dominant conduction pathway for an electrically driven transition, while the majority of the channel area remained in the monoclinic M1 phase. The filament dimensions were estimated using simultaneous electrical probing and nanoscale X-ray diffraction. Analysis revealed that the width of the conducting channel can be tuned externally using resistive loads in series, enabling the M1/R phase ratio in the phase coexistence regime to be tuned.
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  • 10
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    A comparable study of structural and electrical transport properties of Al and Cu nanowires using first-principle calculations (2013)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2013-12-31
    Description: The structural and quantum transport properties of Al and Cu nanowires with diameters up to 3.6 nm are studied using density functional theory combined with Landauer formalism. Contrary to the classical electronic behavior, the conductance of Al wires is larger than that of Cu. This is mainly attributed to the larger contribution of conductance channels from Al-3 p , which is determined by the chemical nature. Meanwhile, the stronger axial contraction of Al wires plays a minor role to conductance. This makes Al wires possible candidate interconnects in integrated circuits.
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