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