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Volumn 31, Issue 25, 1998, Pages 8817-8825

Small molecule probe diffusion in thin and ultrathin supported polymer films

Author keywords

[No Author keywords available]

Indexed keywords

FLUORESCENCE; INTERFACES (MATERIALS); MACROMOLECULES; POLYACRYLATES; POLYSTYRENES; QUARTZ; SUBSTRATES; ULTRATHIN FILMS;

EID: 0032301123     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma9812128     Document Type: Article
Times cited : (81)

References (76)
  • 24
    • 3743066715 scopus 로고    scopus 로고
    • Ph.D. Dissertation. Northwestern University
    • Haas, C. K. Ph.D. Dissertation. Northwestern University, 1998.
    • (1998)
    • Haas, C.K.1
  • 51
    • 85034475262 scopus 로고    scopus 로고
    • note
    • We have assumed that there is a homogeneous distribution of acceptor molecules throughout the acceptor layer prior to annealing. Small molecules may preferentially segregate to interfaces. This could potentially happen during the spincoating process or by preferential diffusion toward an interface during annealing. One might expect that this type of effect could be exacerbated in ultrathin films potentially leading to changes in D with film thickness. However, we have no evidence, such as a substantial lag time for observed energy transfer (see Figures 3 and 5), that significant probe segregation is occurring in our films. The observed diffusive behavior with film thickness does not depend on probe type, and we also find little difference in diffusion whether the acceptor layer is next to the substrate or free surface in the bilayer geometry.
  • 53
    • 85034470259 scopus 로고    scopus 로고
    • note
    • 2 and NRET.
  • 55
    • 3743091163 scopus 로고    scopus 로고
    • Ph.D. Dissertation, Northwestern University
    • Deppe, D. D. Ph.D. Dissertation, Northwestern University, 1996.
    • (1996)
    • Deppe, D.D.1
  • 58
    • 85034483392 scopus 로고    scopus 로고
    • note
    • P2VP may sorb significant amounts of water. Mass uptake and drying experiements on thick films indicated that our drying procedure removed, within error, all of the sorted water. Any possible residual water that may have been present after the drying procedure was found not to shift Tg measurably, as determined by DSC measurements done on samples that experienced even harsher drying procedures.
  • 73
    • 85034487496 scopus 로고    scopus 로고
    • unpublished results
    • Hall, D. B., unpublished results.
    • Hall, D.B.1
  • 76
    • 3743145667 scopus 로고    scopus 로고
    • Ph.D. Dissertation, Northwestern University
    • Hamilton, K. E. Ph.D. Dissertation, Northwestern University, 1996.
    • (1996)
    • Hamilton, K.E.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.