Jump to main content
Jump to site search

Issue 4, 2010
Previous Article Next Article

Liquid crystalline polymer cantilever oscillators fueled by light

Author affiliations

Abstract

We report on the laser and sunlight driven, fast and large oscillation of cantilevers composed of photoresponsive liquid crystal polymer materials. The oscillation frequency, driven with a focused 100 mW laser of multiple wavelengths (457, 488, 514 nm), is as high as 270 Hz and is shown to be strongly correlated to the physical dimensions of the cantilever. The experimental frequency response is accurately described by the calculated natural resonant frequency for a non-damped cantilever. To further understand the conversion efficiency of light energy to mechanical work in the system, the oscillatory behavior of a 2.7 mm × 0.7 mm × 0.04 mm cantilever was examined at pressures ranging from 1 atm to 0.03 atm. A large increase in amplitude from 110° at STP to 250° at low pressure was observed. A first approximation of the system efficiency was calculated at 0.1%. The large increase in amplitude at low pressure indicates strong hydrodynamic loss and thus, the material efficiency is potentially much greater. Using a simple optical setup, oscillatory behavior was also demonstrated using sunlight. This work indicates the potential for remotely triggered photoactuation of photoresponsive polymer cantilevers from long distances with lasers or focused sunlight.

Graphical abstract: Liquid crystalline polymer cantilever oscillators fueled by light

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 14 Aug 2009, accepted on 20 Nov 2009 and first published on 23 Dec 2009


Article type: Paper
DOI: 10.1039/B916831A
Citation: Soft Matter, 2010,6, 779-783
  •   Request permissions

    Liquid crystalline polymer cantilever oscillators fueled by light

    S. Serak, N. Tabiryan, R. Vergara, T. J. White, R. A. Vaia and T. J. Bunning, Soft Matter, 2010, 6, 779
    DOI: 10.1039/B916831A

Search articles by author