Surface modification with cross-linked random copolymers: Minimum effective thickness

Du Yeol Ryu, Jia Yu Wang, Kristopher A. Lavery, Eric Drockenmuller, Sushil K. Satija, Craig J. Hawker, Thomas P. Russell

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

Ultrathin films of benzocyclobutene (BCB)-functionalized random copolymer with styrene and methyl methacrylate, P(S-r-BCB-r-MMA), with thicknesses ranging from 0 to 10.5 nm, were thermally cross-linked on Si substrates. The penetration of deuterated PMMA (dPMMA) into the P(S-r-BCB-r-MMA) films and the microdomain orientation of PS-b-PMMA diblock copolymers on P(S-r-BCB-r-MMA) coated substrates were investigated by neutron reflectivity (NR) and scanning force microscopy (SFM), respectively. NR measurements on bilayers of dPMMA on cross-linked P(S-r-BCB-r-MMA) showed that the neutron scattering length density (SLD) at the substrate was equal to that of P(S-r-BCB-r-MMA) if the P(S-r-BCB-r-MMA) film was thicker than ∼5.5 nm. With decreasing thickness of the P(S-r-BCB-r-MMA) film, the SLD at the substrate increased, characteristic of an increasing penetration of the dPMMA. When thin films of PS-b-PMMA diblock copolymer having cylindrical microdomains are placed on surfaces modified with cross-linked films of P(S-r-BCB-r-MMA) thinner than ∼5.5 nm, the cylindrical microdomains orient parallel to the surface, whereas for thicker films, the microdomains orient normal to the surface. Both of these results indicate that interfacial interactions are screened when the P(S-r-BCB-r-MMA) film is thicker than ∼5.5 nm.

Original languageEnglish
Pages (from-to)4296-4300
Number of pages5
JournalMacromolecules
Volume40
Issue number12
DOIs
Publication statusPublished - 2007 Jun 12

Fingerprint

Surface treatment
Copolymers
Thick films
Substrates
Block copolymers
Neutrons
Polymethyl Methacrylate
Ultrathin films
Neutron scattering
Styrene
Atomic force microscopy
Scattering
Thin films
benzocyclobutene
Methacrylates

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Ryu, D. Y., Wang, J. Y., Lavery, K. A., Drockenmuller, E., Satija, S. K., Hawker, C. J., & Russell, T. P. (2007). Surface modification with cross-linked random copolymers: Minimum effective thickness. Macromolecules, 40(12), 4296-4300. https://doi.org/10.1021/ma062939w
Ryu, Du Yeol ; Wang, Jia Yu ; Lavery, Kristopher A. ; Drockenmuller, Eric ; Satija, Sushil K. ; Hawker, Craig J. ; Russell, Thomas P. / Surface modification with cross-linked random copolymers : Minimum effective thickness. In: Macromolecules. 2007 ; Vol. 40, No. 12. pp. 4296-4300.
@article{6ba6f156a35d4757be4f90d2c5d96e95,
title = "Surface modification with cross-linked random copolymers: Minimum effective thickness",
abstract = "Ultrathin films of benzocyclobutene (BCB)-functionalized random copolymer with styrene and methyl methacrylate, P(S-r-BCB-r-MMA), with thicknesses ranging from 0 to 10.5 nm, were thermally cross-linked on Si substrates. The penetration of deuterated PMMA (dPMMA) into the P(S-r-BCB-r-MMA) films and the microdomain orientation of PS-b-PMMA diblock copolymers on P(S-r-BCB-r-MMA) coated substrates were investigated by neutron reflectivity (NR) and scanning force microscopy (SFM), respectively. NR measurements on bilayers of dPMMA on cross-linked P(S-r-BCB-r-MMA) showed that the neutron scattering length density (SLD) at the substrate was equal to that of P(S-r-BCB-r-MMA) if the P(S-r-BCB-r-MMA) film was thicker than ∼5.5 nm. With decreasing thickness of the P(S-r-BCB-r-MMA) film, the SLD at the substrate increased, characteristic of an increasing penetration of the dPMMA. When thin films of PS-b-PMMA diblock copolymer having cylindrical microdomains are placed on surfaces modified with cross-linked films of P(S-r-BCB-r-MMA) thinner than ∼5.5 nm, the cylindrical microdomains orient parallel to the surface, whereas for thicker films, the microdomains orient normal to the surface. Both of these results indicate that interfacial interactions are screened when the P(S-r-BCB-r-MMA) film is thicker than ∼5.5 nm.",
author = "Ryu, {Du Yeol} and Wang, {Jia Yu} and Lavery, {Kristopher A.} and Eric Drockenmuller and Satija, {Sushil K.} and Hawker, {Craig J.} and Russell, {Thomas P.}",
year = "2007",
month = "6",
day = "12",
doi = "10.1021/ma062939w",
language = "English",
volume = "40",
pages = "4296--4300",
journal = "Macromolecules",
issn = "0024-9297",
publisher = "American Chemical Society",
number = "12",

}

Ryu, DY, Wang, JY, Lavery, KA, Drockenmuller, E, Satija, SK, Hawker, CJ & Russell, TP 2007, 'Surface modification with cross-linked random copolymers: Minimum effective thickness', Macromolecules, vol. 40, no. 12, pp. 4296-4300. https://doi.org/10.1021/ma062939w

Surface modification with cross-linked random copolymers : Minimum effective thickness. / Ryu, Du Yeol; Wang, Jia Yu; Lavery, Kristopher A.; Drockenmuller, Eric; Satija, Sushil K.; Hawker, Craig J.; Russell, Thomas P.

In: Macromolecules, Vol. 40, No. 12, 12.06.2007, p. 4296-4300.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Surface modification with cross-linked random copolymers

T2 - Minimum effective thickness

AU - Ryu, Du Yeol

AU - Wang, Jia Yu

AU - Lavery, Kristopher A.

AU - Drockenmuller, Eric

AU - Satija, Sushil K.

AU - Hawker, Craig J.

AU - Russell, Thomas P.

PY - 2007/6/12

Y1 - 2007/6/12

N2 - Ultrathin films of benzocyclobutene (BCB)-functionalized random copolymer with styrene and methyl methacrylate, P(S-r-BCB-r-MMA), with thicknesses ranging from 0 to 10.5 nm, were thermally cross-linked on Si substrates. The penetration of deuterated PMMA (dPMMA) into the P(S-r-BCB-r-MMA) films and the microdomain orientation of PS-b-PMMA diblock copolymers on P(S-r-BCB-r-MMA) coated substrates were investigated by neutron reflectivity (NR) and scanning force microscopy (SFM), respectively. NR measurements on bilayers of dPMMA on cross-linked P(S-r-BCB-r-MMA) showed that the neutron scattering length density (SLD) at the substrate was equal to that of P(S-r-BCB-r-MMA) if the P(S-r-BCB-r-MMA) film was thicker than ∼5.5 nm. With decreasing thickness of the P(S-r-BCB-r-MMA) film, the SLD at the substrate increased, characteristic of an increasing penetration of the dPMMA. When thin films of PS-b-PMMA diblock copolymer having cylindrical microdomains are placed on surfaces modified with cross-linked films of P(S-r-BCB-r-MMA) thinner than ∼5.5 nm, the cylindrical microdomains orient parallel to the surface, whereas for thicker films, the microdomains orient normal to the surface. Both of these results indicate that interfacial interactions are screened when the P(S-r-BCB-r-MMA) film is thicker than ∼5.5 nm.

AB - Ultrathin films of benzocyclobutene (BCB)-functionalized random copolymer with styrene and methyl methacrylate, P(S-r-BCB-r-MMA), with thicknesses ranging from 0 to 10.5 nm, were thermally cross-linked on Si substrates. The penetration of deuterated PMMA (dPMMA) into the P(S-r-BCB-r-MMA) films and the microdomain orientation of PS-b-PMMA diblock copolymers on P(S-r-BCB-r-MMA) coated substrates were investigated by neutron reflectivity (NR) and scanning force microscopy (SFM), respectively. NR measurements on bilayers of dPMMA on cross-linked P(S-r-BCB-r-MMA) showed that the neutron scattering length density (SLD) at the substrate was equal to that of P(S-r-BCB-r-MMA) if the P(S-r-BCB-r-MMA) film was thicker than ∼5.5 nm. With decreasing thickness of the P(S-r-BCB-r-MMA) film, the SLD at the substrate increased, characteristic of an increasing penetration of the dPMMA. When thin films of PS-b-PMMA diblock copolymer having cylindrical microdomains are placed on surfaces modified with cross-linked films of P(S-r-BCB-r-MMA) thinner than ∼5.5 nm, the cylindrical microdomains orient parallel to the surface, whereas for thicker films, the microdomains orient normal to the surface. Both of these results indicate that interfacial interactions are screened when the P(S-r-BCB-r-MMA) film is thicker than ∼5.5 nm.

UR - http://www.scopus.com/inward/record.url?scp=34347344903&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34347344903&partnerID=8YFLogxK

U2 - 10.1021/ma062939w

DO - 10.1021/ma062939w

M3 - Article

AN - SCOPUS:34347344903

VL - 40

SP - 4296

EP - 4300

JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

IS - 12

ER -

Ryu DY, Wang JY, Lavery KA, Drockenmuller E, Satija SK, Hawker CJ et al. Surface modification with cross-linked random copolymers: Minimum effective thickness. Macromolecules. 2007 Jun 12;40(12):4296-4300. https://doi.org/10.1021/ma062939w