nanotube peapods A. L. Cantone, M. R. Buitelaar, C. G. Smith, D. Anderson, G. A. C. Jones, S. J. Chorley, C. Casiraghi, A. Lombardo, A. C. Ferrari, H. Shinohara, A. Ardavan, J. Warner, A. A. R. Watt, K. Porfyrakis, and G. A. D. Briggs Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, United Kingdom Engineering Department, University of Cambridge, Cambridge CB3 0FA, United Kingd...

In this work surface-enhanced resonance Raman spectroscopic experiments have demonstrated that metallic single-walled carbon nanotubes can be used as chemical assemblies between the pyrene analyte and the silver colloidal surface. Pyrene has been detected at concentrations lower than 10(-9) M by use of the 514.5 nm excitation laser line. A charge transfer from the surface to the nanotube charac...

A model is proposed for two observed current–voltage (I – V) patterns in a recent experiment with a scanning tunneling microscope tip and a carbon nanotube @Collins et al., Science 278, 100 ~1997!#. We claim that there are two mechanical contact modes for a tip ~metal!–nanotube ~semiconductor! junction ~1! with or ~2! without a tiny vacuum gap ~0.1–0.2 nm!. With the tip grounded, the tunneling ...

Carbon nanotube transistors combine molecular-scale dimensions with excellent electronic properties, offering unique opportunities for chemical and biological sensing. Here, we form supported lipid bilayers over single-walled carbon nanotube transistors. We first study the physical properties of the nanotube/supported lipid bilayer structure using fluorescence techniques. Whereas lipid molecule...

We evaluate the cohesive energies E b of four systems in which particles move on a cylindrical surface, at fixed distance R from the axis. We find quite nonuniversal dependences of E b on R. For the Coulomb binding problem, E b is a monotonically decreasing function of R. For three problems involving Lennard-Jones interactions, the behavior is nonmonotonic; E b is larger at R = ∞ than at R=0; t...

The Cover Feature shows a scheme of the synthesis by atomic layer deposition 2D iron sulfide nanosheets conformal and homogenously grown on titanium dioxide nanotube layers. Those composite nanotubular structures feature electrocatalytic activity toward hydrogen evolution reaction in alkaline media, originated from synergistic interplay between situ both morphological chemical composition chang...

a r t i c l e i n f o a b s t r a c t The flow of aqueous NaCl and NaI solutions through carbon nanotubes is treated by extensive molecular dynamics simulations. The dependence of diverse transport features on the solute specificity, the nanotube geometry, and the various atomic models employed, including polarizability, is addressed in detail. The interpretations are developed in conjunction w...

We show that the usual sum of R-6 contributions from elements separated by distance R can give qualitatively wrong results for the electromagnetically nonretarded van der Waals interaction between nonoverlapping bodies. This occurs for anisotropic nanostructures that have a zero electronic energy gap, such as metallic nanotubes or nanowires, and nanolayered systems including metals and graphene...

In this paper, we applied self-aligned T-gate design to aligned carbon nanotube array transistors and achieved an extrinsic current-gain cutoff frequency (ft) of 25 GHz, which is the best on-chip performance for nanotube radio frequency (RF) transistors reported to date. Meanwhile, an intrinsic current-gain cutoff frequency up to 102 GHz is obtained, comparable to the best value reported for na...

The elastic moduli of polymer-carbon nanotube composites are examined by molecular dynamics simulations of a single-walled carbon nanotube embedded in polyethylene. The overall system is modeled with a many-body bond order potential due to Brenner. Alternatively, only the carbon nanotube is modeled with Brenner’s potential and the polyethylene matrix is modeled by a united-atom potential. For t...