Frequency modulation of laser ultrasound transducer using carbon nanotube-coated polyethylene microsphere

A phase-stabilized carbon nanotube fiber laser frequency comb.

A frequency comb generated by a 167 MHz repetition frequency erbium-doped fiber ring laser using a carbon nanotube saturable absorber is phase-stabilized for the first time. Measurements of the in-loop phase noise show an integrated phase error on the carrier envelope offset frequency of 0.35 radians. The carbon nanotube fiber laser comb is compared with a CW laser near 1533 nm stabilized to th...

Laser-generated ultrasound with optical fibres using functionalised carbon nanotube composite coatings

nanotube composite coatings Richard J. Colchester, Charles A. Mosse, Davinder S. Bhachu, Joseph C. Bear, Claire J. Carmalt, Ivan P. Parkin, Bradley E. Treeby, Ioannis Papakonstantinou, and Adrien E. Desjardins Department of Medical Physics and Bioengineering, University College London, Malet Place Engineering Building, London WC1E 6BT, United Kingdom Materials Chemistry Centre, Department of Ch...

Stimuli-responsive transformation in carbon nanotube/expanding microsphere-polymer composites.

Our work introduces a class of stimuli-responsive expanding polymer composites with the ability to unidirectionally transform their physical dimensions, elastic modulus, density, and electrical resistance. Carbon nanotubes and core-shell acrylic microspheres were dispersed in polydimethylsiloxane, resulting in composites that exhibit a binary set of material properties. Upon thermal or infrared...

Carbon Nanotube High Frequency Devices

Molecular dynamics simulation of polyethylene on single wall carbon nanotube.

Molecular dynamics simulations are carried out on the isothermal crystallization process of single polyethylene chains with different chain lengths on the single wall carbon nanotube. This process is summarized as two steps, i.e., adsorption and orientation, and the bond-orientational order parameter is used to show the details of this process. The results show that the attractive van der Waals...