Monitoring of ultraviolet pulse rate dependent photomechanical actuation in carbon nanotubes using fiber Bragg gratings

Journal Article · Mon Jan 06 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4860965· OSTI ID:22257147

Shivananju, B. N.; Suri, Ashish ^[1]; Asokan, S. ^[1]; Misra, Abha ^[1]

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1. Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore (India)

In this Letter, we present a non-contact method of controlling and monitoring photomechanical actuation in carbon nanotubes (CNT) by exposing it to ultra-violet radiation at different pulse rates (10 to 200 Hz). This is accomplished by imparting a reversible photo induced strain (5–330 με) on CNT coated fibre Bragg gratings; CNT undergoes an internal reversible structural change due to cyclic photon absorption that leads to the development of mechanical strain, which in turn allows reversible switching of the Bragg wavelength. The results also reveal an interesting pulse rate dependent rise and fall times of photomechanical actuation in CNT.

• OSTI ID: 22257147
• Journal Information: Applied Physics Letters, Vol. 104, Issue 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
77 NANOSCIENCE AND NANOTECHNOLOGY
BRAGG REFLECTION
CARBON NANOTUBES
GRATINGS
PHOTONS
ULTRAVIOLET RADIATION