Effect of Nanoparticle Core Size on Polymer-Coated Gold Nanoparticle Location in Block Copolymers

POSTER

Abstract

Gold nanoparticles modified by short chain polymer thiols [Au-PS] can be designed to strongly localize either in the PS domains of a polystyrene-b-poly(2-vinylpyridine) [PS-PVP] block copolymer or at the interface.~ The P2VP block has a stronger attractive interaction with bare gold than the PS block.~ Thus, when the areal chain density $\Sigma $ of end-attached PS chains falls below a critical areal chain density $\Sigma _{c}$ the Au-PS nanoparticles adsorb to the PS-b-P2VP interface.~ The effect of the polymer ligand molecular weight on the $\Sigma _{c}$ has been shown to scale as $\Sigma _{c} \quad \sim $ ((R + Rg)/(R*Rg))\^{}2, where R is the curvature of the Au nanoparticle core radius.~ To test this scaling relation for $\Sigma _{c}$ further we are synthesizing gold nanoparticles with different core radii and will present preliminary results on $\Sigma _{c}$ as a function of R.

Authors

  • J. D. Petrie

    • UCSB

  • Glenn Fredrickson

    • UCSB - MC CAM
    • Materials Research Laboratory, University of California, Santa Barbara
    • University of California, Santa Barbara
    • Materials Research Lab, UCSB
    • Department of Chemical Engineering and the Materials Research Laboratory, University of California, Santa Barbara
    • UCSB, USA
    • UC Santa Barbara
    • UCSB

  • Ed Kramer

    • UCSB - MC CAM
    • Department of Materials and Chemical Engineering, University of California Santa Barbara
    • University of California, Santa Barbara
    • Mitsubishi Chemicals-Center for Advanced Materials, Materials Research Laboratory, University of California, Santa Barbara, CA 93106
    • UCSB
    • Materials Research Laboratory, University of California, Santa Barbara
    • Materials Department, UCSB
    • University of California Santa Barbara