Selective Fusion, Solvent Dissolution, and Local Symmetry Effects in Inversion of Colloidal Crystals to Ordered Porous Films

TY - JOUR

T1 - Selective Fusion, Solvent Dissolution, and Local Symmetry Effects in Inversion of Colloidal Crystals to Ordered Porous Films

AU - Zhang, Ting

AU - Qian, Jun

AU - Tuo, Xinlin

AU - Yuan, Jun

PY - 2010/3/2

Y1 - 2010/3/2

N2 - Polystyrene-methacrylic core-shell nanospheres, self-assembled into face-centered-cube-like colloidal crystals with their (001) planes parallel to the substrate, have been transformed into ordered pore structures by a toluene treatment. Detailed analysis by transmission electron microscopy reveals that the morphological transformation is preceded by an internal neck formation Clue to selective fusion of the polystyrene-rich core material, at the contacts between the nanoparticles, followed by the selective dissolution of the polystyrene-rich cores. We have demonstrated the importance of local symmetry and compactness of the nanospheres assembly in determining the nature of neck formation and the existence of multiscale ordered pore structures in the square facing colloidal crystals. The pseudo layer-by-layer nature of the selective dissolution of square arranged nanosphere multilayers is responsible for the observed three-dimensional pore structures.

AB - Polystyrene-methacrylic core-shell nanospheres, self-assembled into face-centered-cube-like colloidal crystals with their (001) planes parallel to the substrate, have been transformed into ordered pore structures by a toluene treatment. Detailed analysis by transmission electron microscopy reveals that the morphological transformation is preceded by an internal neck formation Clue to selective fusion of the polystyrene-rich core material, at the contacts between the nanoparticles, followed by the selective dissolution of the polystyrene-rich cores. We have demonstrated the importance of local symmetry and compactness of the nanospheres assembly in determining the nature of neck formation and the existence of multiscale ordered pore structures in the square facing colloidal crystals. The pseudo layer-by-layer nature of the selective dissolution of square arranged nanosphere multilayers is responsible for the observed three-dimensional pore structures.

KW - ALIGNED CARBON NANOTUBES

KW - PHOTONIC CRYSTALS

KW - POLYMER NETS

KW - PARTICLES

KW - GROWTH

KW - ARCHITECTURE

KW - CONVERSION

KW - SILICA

KW - ARRAYS

KW - SIZE

UR - http://www.scopus.com/inward/record.url?scp=77749319281&partnerID=8YFLogxK

U2 - 10.1021/la903158z

DO - 10.1021/la903158z

M3 - Article

SN - 0743-7463

VL - 26

SP - 3690

EP - 3694

JO - Langmuir

JF - Langmuir

IS - 5

ER -