Mechanical perturbation of tailor-made elastic micro-structures using optical tweezers

Jana Kubackova; Veronika Kazikova; Gabriel Zoldak; Zoltan Tomori; Gregor Bano

doi:10.1117/12.2529126

9 September 2019 Mechanical perturbation of tailor-made elastic micro-structures using optical tweezers

Jana Kubackova, Veronika Kazikova, Gabriel Zoldak, Zoltan Tomori, Gregor Bano

Proceedings Volume 11083, Optical Trapping and Optical Micromanipulation XVI; 1108334 (2019) https://doi.org/10.1117/12.2529126
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

Two-photon absorption polymerization (2PP) is a versatile lithographic method for building three-dimensional microdevices with sub-diffraction resolution and tunable elasticity. Using 2PP of organo-ceramic hybrid OrmoComp (trimethylolpropane triacrylate), we prepared microsized polymeric cantilevers consisting of the surface-anchored micropillar, long elastic neck and spherical head. A typical microcantilever has the length of 30 micrometers and thickness of 1-2 micrometers. To investigate the mechanical properties of our elastic microcantilever, we applied a laser optical trapping force on the head of the cantilever and bent the head from its equilibrium position. After switching off the laser trap, the head returns to the equilibrium position. The time-dependent restoring trajectory of the head was recorded by a fast video-tracking technique (500 fps) and subjected to the custom-made drift-correcting image analysis. We find that the microcantilever relaxation process is well-described by a single-exponential relaxation curve with a time constant of 16.5 ± 1.2 ms. Assuming a highly overdamped regime, theoretical calculations yielded an apparent Young´s modulus for our OrmoComp microstructure of 1 MPa, which is 3-orders of magnitude smaller than the reported value for the bulk material (~1 GPa). The possible reasons for such discrepancy are discussed.

Citation Download Citation

Jana Kubackova, Veronika Kazikova, Gabriel Zoldak, Zoltan Tomori, and Gregor Bano "Mechanical perturbation of tailor-made elastic micro-structures using optical tweezers", Proc. SPIE 11083, Optical Trapping and Optical Micromanipulation XVI, 1108334 (9 September 2019); https://doi.org/10.1117/12.2529126

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available