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With Tag: Electric Phenomena

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Fluctuation conductivity in NdBa 2 Cu 3 O 7− δ and REBa 2 Cu 3 O 7− δ superconductors where RE is a natural mixture of rare earth elements

Physica C-superconductivity and Its Applications | 2001 | 10.1016/S0921-4534(00)01531-8

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Electronic Structure of Subnanometer Diameter MoS2−Ix Nanotubes

Dragan Mihailovic, Stefan Eisebitt, Mirko Freiwald, Anna Zimina, Stefan Cramm, Wolfgang Eberhardt, Ales Mrzel
Nano Letters | 2004 | 10.1021/nl049068t

The local electronic structure in subnanometer diameter MoS 2 −I x nanotubes is investigated by soft X-ray absorption and X-ray fluorescence spectroscopies. The nanotubes are found to be semiconducting, with a band gap of 0.4 ± 0.2 eV. The density of...

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Toward Wafer Scale Fabrication of Graphene Based Spin Valve Devices

Jayakumar Balakrishnan, Ahmet Avsar, Gernot Güntherodt, Bernd Beschoten, Tsung-Yeh Yang, Barbaros Özyilmaz, Manu Jaiswal, Frank Volmer, Syed Rizwan Ali, Byung Hee Hong, Sukang Bae, Zheng Yi
Nano Lett. | 2011 | 10.1021/nl200714q

We demonstrate injection, transport, and detection of spins in spin valve arrays patterned in both copper based chemical vapor deposition (Cu-CVD) synthesized wafer scale single layer and bilayer graphene. We observe spin relaxation times comparable to those...

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Single-Walled Carbon Nanotubes as Templates for Nanowire Conducting Probes

Neil R. Wilson, Julie V. Macpherson
Nano Letters | 2003 | 10.1021/nl034505+

We describe a method for the formation of metal nanowires at the apex of scanning probe microscopy (SPM) tips using single-walled carbon nanotubes (SWNT) as templates. The SWNT-SPM tips are sputter coated with metal, here AuPd or Au, resulting in the...

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Approaching the Resolution Limit of Nanometer-Scale Electron Beam-Induced Deposition

Willem F. Van Dorp, Pieter Kruit, Peter A. Crozier, Cornelis W. Hagen, Bob Van Someren
Nano Lett. | 2005 | 10.1021/nl050522i

We report the writing of very high resolution tungsten containing dots in regular arrays by electron beam-induced deposition (EBID). The size averaged over 100 dots was 1.0 nm at fwhm. Because of the statistical spread in the dot size, large and small dots...

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Photogenerated Free Carrier Dynamics in Metal and Semiconductor Single-Walled Carbon Nanotube Films

Matthew C. Beard, Michael J. Heben, Jeffrey L. Blackburn
Nano Lett. | 2008 | 10.1021/nl801913y

Time-resolved THz spectroscopy (TRTS) is employed to study the photogenerated charge-carrier dynamics in transparent films of single-walled carbon nanotubes (SWNTs). Two films were investigated: a film with 94% semiconducting-type tubes (s-SWNTs) and a film...

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Polarization Switching Ability Dependent on Multidomain Topology in a Uniaxial Organic Ferroelectric

Sachio Horiuchi, Youichi Murakami, Shoji Ishibashi, Reiji Kumai, Kensuke Kobayashi, Fumitaka Kagawa, Nao Minami, Yoshinori Tokura
Nano Lett. | 2013 | 10.1021/nl403828u

The switching of electric polarization induced by electric fields, a fundamental functionality of ferroelectrics, is closely associated with the motions of the domain walls that separate regions with distinct polarization directions. Therefore, understanding...

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Few-Layer Nanoplates of Bi2Se3 and Bi2Te3 with Highly Tunable Chemical Potential

Hailin Peng, Judy J. Cha, Zhongfan Liu, Wenhui Dang, Desheng Kong, Stefan Meister, Hui Li, Yi Cui
Nano Lett. | 2010 | 10.1021/nl101260j

A topological insulator (TI) represents an unconventional quantum phase of matter with insulating bulk band gap and metallic surface states. Recent theoretical calculations and photoemission spectroscopy measurements show that group V−VI materials Bi 2 Se 3 ...

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Approximate Analytical Models for Phonon Specific Heat and Ballistic Thermal Conductance of Nanowires

Tao Tong, Arun Majumdar, Ravi Prasher
Nano Lett. | 2007 | 10.1021/nl0721665

We introduce simple approximate analytical models for phonon specific heat and ballistic thermal conductance of nanowires. The analytical model is in excellent agreement with the detailed numerical calculations based on the solution of the elastic wave...

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Silica Nanorod-Array Films with Very Low Refractive Indices

Jong Kyu Kim, J.-Q. Xi, E. F. Schubert
Nano Lett. | 2005 | 10.1021/nl050698k

The refractive-index contrast is an important figure of merit for dielectric multilayer structures, optical resonators, and photonic crystals. This represents a strong driving force for novel materials that have refractive indices lower than those of...

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Plasmon Resonance in Individual Nanogap Electrodes Studied Using Graphene Nanoconstrictions as Photodetectors

Xiaodong Xu, D. C. Ralph, P. L. McEuen, S.-F. Shi
Nano Lett. | 2011 | 10.1021/nl200522t

We achieve direct electrical readout of the wavelength and polarization dependence of the plasmon resonance in individual gold nanogap antennas by positioning a graphene nanoconstriction within the gap as a localized photodetector. The polarization...

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Playing Pinball with Atoms

Arie Van Houselt, Raoul Van Gastel, Bene Poelsema, Amirmehdi Saedi, Harold J. W. Zandvliet
Nano Lett. | 2008 | 10.1021/nl8022884

We demonstrate the feasibility of controlling an atomic scale mechanical device by an external electrical signal. On a germanium substrate, a switching motion of pairs of atoms is induced by electrons that are directly injected into the atoms with a scanning...

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Observation of Plasmon Propagation, Redirection, and Fan-Out in Silver Nanowires

Mark A. Reed, David A. Routenberg, Aric W. Sanders, Benjamin J. Wiley, Younan Xia, Eric R. Dufresne
Nano Lett. | 2006 | 10.1021/nl052471v

We report the coupling of free-space photons (vacuum wavelength of 830 nm) to surface plasmon modes of a silver nanowire. The launch of propagating plasmons, and the subsequent emission of photons, is selective and occurs only at ends and other...

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Absence of Strong Gate Effects in Electrical Measurements on Phenylene-Based Conjugated Molecules

Günther Lientschnig, Jeong-O Lee, Peter Hadley, Frank Wiertz, David N. Reinhoudt, Cees Dekker, Martin Struijk, Réne A. J. Janssen, Richard Egberink
Nano Letters | 2003 | 10.1021/nl025882+

The electronic transport characteristics of self-assembled monolayers of phenylene-based π-conjugated molecules were measured in a three-terminal device geometry. The short (∼1 nm) molecules were connected between two gold electrodes with a nearby Al 2 O 3 ...

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Electron-Tunneling Modulation in Percolating Network of Graphene Quantum Dots: Fabrication, Phenomenological Understanding, and Humidity/Pressure Sensing Applications

Vikas Berry, Vasanta Pallem, Augustus Graham, T. S. Sreeprasad, Evgeniy Shishkin, Alfredo Alexander Rodriguez, Jonathan Colston
Nano Lett. | 2013 | 10.1021/nl4003443

The two-dimensional (2D) electron cloud, flexible carbon–carbon bonds, chemical modifiability, and size-dependent quantum–confinement and capacitance makes graphene nanostructures (GN) a widely tunable material for electronics. Here we report the...

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Electrical and Thermal Coupling to a Single-Wall Carbon Nanotube Device Using an Electrothermal Nanoprobe

Eric Pop, Albert Liao, Jungchul Lee, William P. King
Nano Lett. | 2009 | 10.1021/nl803024p

We utilize a multifunctional atomic force microscope (AFM) cantilever applying highly localized temperature and electric fields to interrogate transport in single-wall carbon nanotube field-effect transistors (CNTFETs). The probe can be operated either in...

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Imaging Electromigration during the Formation of Break Junctions

Daniel C. Ralph, Kirill I. Bolotin, Thiti Taychatanapat, Ferdinand Kuemmeth
Nano Lett. | 2007 | 10.1021/nl062631i

Using a scanning electron microscope, we make real-time movies of gold nanowires during the process of electromigration. We confirm the importance of using a small series resistance when employing electromigration to make controlled nanometer-scale gaps...

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Current–Voltage Characterization of Individual As-Grown Nanowires Using a Scanning Tunneling Microscope

Rainer Timm, James L. Webb, Andreas Jönsson, David L. J. Engberg, Alexander Fian, Olof Persson, Lars Samuelson, Magnus T. Borgström, Jesper Wallentin, Anders Mikkelsen
Nano Lett. | 2013 | 10.1021/nl402570u

Utilizing semiconductor nanowires for (opto)electronics requires exact knowledge of their current–voltage properties. We report accurate on-top imaging and I–V characterization of individual as-grown nanowires, using a subnanometer resolution scanning...

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Conformational Molecular Rectifiers

Mark A. Ratner, Alessandro Troisi
Nano Lett. | 2004 | 10.1021/nl0352088

Unimolecular rectification based on voltage-controlled intramolecular stereochemical modification is suggested and computationally investigated. In sharp contrast to present molecular rectifiers, these conformational molecular rectifiers (CMRs) differ in...

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