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Surface-initiated free radical polymerization of polystyrene micropatterns on a self-assembled monolayer on gold

Publication ,  Journal Article
Hyun, J; Chilkoti, A
Published in: Macromolecules
July 31, 2001

We describe the in situ synthesis of nanometer thick films of polystyrene (PS) on a self-assembled monolayer (SAM) on gold by surface-initiated free radical polymerization and further demonstrate that three-dimensional polymer structures with micrometer lateral resolution and nanometer vertical resolution can be fabricated by combining microcontact printing (μCP) with surface-initiated polymerization (SIP). We implemented SIP onto a COOH-terminated SAM on gold using a sequential approach to couple an amine-terminated free radical initiator to the terminal COOH groups presented by the SAM, followed by free radical polymerization of styrene. Each step of SIP was characterized by X-ray photoelectron spectroscopy and ellipsometry, and the PS film and micropattern were also characterized by atomic force microscopy. We typically Obtained PS films with a thickness of 10-20 nm for a polymerization time of 12-24 h and with a root-mean-square roughness of ≤0.5 nm. PS micropatterns were also successfully fabricated by reactive μCP of the initiator onto a COOH-terminated SAM, followed by SIP of styrene. We also demonstrate two potential applications of SIP in biomaterials research: (1) label-free, real-time monitoring of protein adsorption on polymers by surface plasmon resonance (SPR) on nanometer thick homogeneous polymer films fabricated on a SAM on gold and (2) patterning cells on micropatterned polymers fabricated by combining μCP and SIP.

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Published In

Macromolecules

DOI

ISSN

0024-9297

Publication Date

July 31, 2001

Volume

34

Issue

16

Start / End Page

5644 / 5652

Related Subject Headings

  • Polymers
  • 40 Engineering
  • 34 Chemical sciences
  • 09 Engineering
  • 03 Chemical Sciences
 

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Hyun, J., & Chilkoti, A. (2001). Surface-initiated free radical polymerization of polystyrene micropatterns on a self-assembled monolayer on gold. Macromolecules, 34(16), 5644–5652. https://doi.org/10.1021/ma002125u
Hyun, J., and A. Chilkoti. “Surface-initiated free radical polymerization of polystyrene micropatterns on a self-assembled monolayer on gold.” Macromolecules 34, no. 16 (July 31, 2001): 5644–52. https://doi.org/10.1021/ma002125u.
Hyun, J., and A. Chilkoti. “Surface-initiated free radical polymerization of polystyrene micropatterns on a self-assembled monolayer on gold.” Macromolecules, vol. 34, no. 16, July 2001, pp. 5644–52. Scopus, doi:10.1021/ma002125u.
Journal cover image

Published In

Macromolecules

DOI

ISSN

0024-9297

Publication Date

July 31, 2001

Volume

34

Issue

16

Start / End Page

5644 / 5652

Related Subject Headings

  • Polymers
  • 40 Engineering
  • 34 Chemical sciences
  • 09 Engineering
  • 03 Chemical Sciences