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Cracks in Magnetic Nanocrystal Films: Do Directional and Isotropic Crack Patt...
In this letter, we show that the use of nanocrystals enables new insights into the scaling law of crack patterns. Directional and isotropic crack patterns made of γ-Fe2O3... -
Ligand-Induced Anisotropy of the Two-Photon Luminescence of Spherical Gold Pa...
Here we report on the visible luminescence properties of individual spherical gold particles in solution, obtained by two-photon excited fluorescence correlation spectroscopy... -
Detection of Nanoscale Magnetic Activity Using a Single Carbon Nanotube
The ultimate conductometric sensor for ferromagnetic activity of nanoscale magnetic materials could be a single carbon nanotube. We show that the electrical conductance of an... -
A Multi-Wall Carbon Nanotube Tower Electrochemical Actuator
Patterned multiwall carbon nanotube arrays up to four millimeters long were synthesized using chemical vapor deposition. Electrochemical actuation of a nanotube array tower was... -
Mesoporous Bragg Stack Color Tunable Sensors
Herein we report a novel self-assembly synthesis, structural and optical characterization of mesoporous Bragg stacks (MBS) composed of spin-coated multilayer stacks of... -
Anisotropic Etching and Nanoribbon Formation in Single-Layer Graphene
We demonstrate anisotropic etching of single-layer graphene by thermally-activated nickel nanoparticles. Using this technique, we obtain sub-10nm nanoribbons and other graphene... -
Flexible Piezotronic Strain Sensor
Strain sensors based on individual ZnO piezoelectric fine-wires (PFWs; nanowires, microwires) have been fabricated by a simple, reliable, and cost-effective technique. The... -
Ionic Screening of Charged-Impurity Scattering in Graphene
We have studied the ionic screening effect on the charge transport properties of graphene field effect transistors. By increasing the ionic concentration, we found dramatic... -
Contact Geometry and Conductance of Crossed Nanotube Junctions under Pressure
We explored the relative stability, structure, and conductance of crossed nanotube junctions with dispersion corrected density functional theory. We found that the most stable... -
Permeable Silica Shell through Surface-Protected Etching
We describe a “surface-protected etching” strategy that allows convenient conversion of sol−gel derived silica into porous structures. Poly(vinyl pyrrolidone) is used to protect... -
Photoinduced Charge Transfer and Efficient Solar Energy Conversion in a Blend...
We present measurements of charge transfer and the photovoltaic effect in a blend of the alternating polyfluorene copolymer... -
Carbon Nanotubes as Injection Electrodes for Organic Thin Film Transistors
We have investigated the charge injection efficiency of carbon nanotube electrodes for organic semiconducting layers and compared their performance to that of traditional noble... -
Charge Transport in Dual Gated Bilayer Graphene with Corbino Geometry
The resistance of dual-gated bilayer graphene is measured as a function of temperature and gating electric fields in the Corbino geometry which precludes edge transport. The... -
Suppression of Auger Processes in Confined Structures
We explore how the size and shape of the microscopic confinement potential affects the nonradiative Auger decay rate of confined carriers. Calculations conducted in the... -
Thickness-Dependent Thermal Conductivity of Encased Graphene and Ultrathin Gr...
The thermal conductivity of graphene and ultrathin graphite (thickness from 1 to ∼20 layers) encased within silicon dioxide was measured using a heat spreader method. The... -
Rational Fabrication of Graphene Nanoribbons Using a Nanowire Etch Mask
We report a rational approach to fabricate graphene nanoribbons (GNRs) with sub-10 nm width by employing chemically synthesized nanowires as the physical protection mask in... -
Cross-Talk between Lung and Systemic Circulation during Carbon Nanotube Respi...
Nanotechnology is an emerging field that demands urgent development of adequate toxicology and risk assessment. The previous experimental data on carbon nanotube respiratory... -
Monolayer Suppression of Transport Imaged in Annealed PbSe Nanocrystal Arrays
We use correlated electrostatic force, transmission electron, and atomic force microscopy (EFM, TEM, and AFM) to visualize charge transport in monolayers and up to five layers... -
Two Distinct Buckling Modes in Carbon Nanotube Bending
By using controlled SPM manipulation, carbon nanotubes have been continuously bent into a series of increasing angles, and two distinct buckling modes corresponding to “abrupt”... -
Effect of Hydrocarbon Chain Length of Amphiphilic Ruthenium Dyes on Solid-Sta...
We studied the influence of the hydrophobic hydrocarbon chain length of amphiphilic ruthenium dyes on the device performance in solid-state dye-sensitized solar cells. We found...
