Elasticity of two-photon-fabricated nano-wires

Sana Nakanishi; Hong-Bo Sun; Satoshi Kawata

doi:10.1117/12.733499

11 September 2007 Elasticity of two-photon-fabricated nano-wires

Sana Nakanishi, Hong-Bo Sun, Satoshi Kawata

Proceedings Volume 6645, Nanoengineering: Fabrication, Properties, Optics, and Devices IV; 664514 (2007) https://doi.org/10.1117/12.733499
Event: NanoScience + Engineering, 2007, San Diego, California, United States

Abstract

We have found that a polymer nano-wire with a radius of around 100 nm has a shear modulus three order of magnitude smaller than that measured from the bulk of the same material. This large difference in shear modulus indicates that elasticity of nano-scale structures is not scalable from bulk material. To understand the elasticity of polymer nano-scale structures, we evaluated influence of fabrication conditions on elasticity of photopolymer nano-wires. We fabricated a nano-wire by two-photon polymerization into a shape of a coil spring: geometry capable to magnify mechanical deformations. We stretched the spring by laser trapping, and from force-strain relation we calculated the shear modulus of the polymer wire. When the laser power for fabrication increased by 20 % from polymerization threshold, the shear modulus increased from 0.39 MPa and saturated at 0.77 MPa. We used Raman spectroscopy to investigate the progress of polymerization reaction for each laser power. From the Raman spectra, the cause of lower shear modulus in the nano-wire fabricated by lower laser power was remarked as inadequate polymerization process. Additional UV irradiation hardened the nano-wire fabricated by lower laser power¹. The result demonstrates that the combinative use of two-photon fabrication and subsequent UV irradiation makes it possible to control both the spatial resolution in two-photon fabrication and elasticity of polymer structures.

Citation Download Citation

Sana Nakanishi, Hong-Bo Sun, and Satoshi Kawata "Elasticity of two-photon-fabricated nano-wires", Proc. SPIE 6645, Nanoengineering: Fabrication, Properties, Optics, and Devices IV, 664514 (11 September 2007); https://doi.org/10.1117/12.733499

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