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Volumn 39, Issue 11, 2006, Pages 3901-3906

High-dielectric-constant self-assembled nodular structures in polymer/gold nanoparticle films

Author keywords

[No Author keywords available]

Indexed keywords

COMPATIBILIZER; N-BUTYL ACETATE (BUAC); POLYCAPROLACTONE (PCL); SPIN-CASTING;

EID: 33745743654     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma052278n     Document Type: Article
Times cited : (30)

References (31)
  • 1
    • 0032206869 scopus 로고    scopus 로고
    • and references therein
    • Alivisatos, A. P.; et al. Adv. Mater. 1998, 10, 1297 and references therein.
    • (1998) Adv. Mater. , vol.10 , pp. 1297
    • Alivisatos, A.P.1
  • 7
    • 0037192317 scopus 로고    scopus 로고
    • Macromolecules 2002, 35, 1060.
    • (2002) Macromolecules , vol.35 , pp. 1060
  • 11
    • 0037428180 scopus 로고    scopus 로고
    • Lin, Y.; et al. Science 2003, 299, 226.
    • (2003) Science , vol.299 , pp. 226
    • Lin, Y.1
  • 16
    • 33745762321 scopus 로고    scopus 로고
    • High dielectric polymer composites and methods of preparation thereof. US Patent 6,864,306
    • Rao, Y.; Wong, C. P.; Xu, J. High dielectric polymer composites and methods of preparation thereof. US Patent 6,864,306, 2005.
    • (2005)
    • Rao, Y.1    Wong, C.P.2    Xu, J.3
  • 20
    • 33745752246 scopus 로고    scopus 로고
    • note
    • In principle, there can be additional macrophase separation inside the polymer-rich regions (for example, between cross-linking acrylate matrix and PCL chains). This type of phase separation, however, would start at a later time than the solvent-polymer one and would be substantially slowed down by the vitrification of polymer-rich domains. Thus, PCL-rich and PMMA-rich domains would probably grow only within nanometer range (< 100 nm), while the polymer - solvent phase separation would be primarily responsible for the structures developing on the micron length scale.
  • 22
    • 33745741884 scopus 로고    scopus 로고
    • note
    • On the basis of thermodynamic considerations alone (Figure 2b), one could conjecture that cascading phase separation could occur even without cross-linking (driven purely by solvent evaporation). In that case, though, it is more likely that coalescence of polymer-rich domains would preempt their vitrification, and the multiscale pattern would not be observed. A comprehensive kinetic model combining the description of PIPS and solvent evaporation would be required to determine which conditions are necessary for the formation of multiscale nodules. To our knowledge, no such model exists at present time.
  • 23
    • 33745741411 scopus 로고    scopus 로고
    • note
    • In a similar cross-linking acrylate/PCL/BuAc system without gold particles, no nodules or multiscale self-similar structures were seen (films were either translucent or milky white, indicating some degree of macrophase separation). It is likely, therefore, that particles act as nuclei to start the phase separation and speed up its kinetics. Thus, in a system without particles, vitrification arrests the phase separation relatively early; in the presence of particles, vitrification stops the process only at its relatively late stage, with primary, secondary, and even tertiary phase separation well under way.
  • 27
    • 0035902719 scopus 로고    scopus 로고
    • Macromolecules 2001, 34, 5317.
    • (2001) Macromolecules , vol.34 , pp. 5317
  • 29
    • 33745756219 scopus 로고    scopus 로고
    • note
    • Our estimates of the dielectric constant of the nodule assume that dielectric properties inside the nodule remain constant or vary smoothly as a function of position. Further investigation is needed to confirm or disprove this assumption.
  • 30
    • 33745744801 scopus 로고    scopus 로고
    • note
    • 24
  • 31
    • 33745740200 scopus 로고    scopus 로고
    • Dielectric Constant Composites. US Patent Application 20040180988
    • Bernius, M.; Drumright, R.; Elwell, M. High Dielectric Constant Composites. US Patent Application 20040180988, 2004.
    • (2004)
    • Bernius, M.1    Drumright, R.2    High, E.M.3


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.