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Volumn 38, Issue 22, 2005, Pages 8971-8974

Photochromic and optical birefringence properties of azo-dye-doped polymer-grafted lipid-based complex fluids

Author keywords

[No Author keywords available]

Indexed keywords

BIOMOLECULES; COSURFACTANTS; FLUID-BASED SYSTEM; PHOTOCHROMIC PROPERTIES;

EID: 27744445654     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma051650w     Document Type: Article
Times cited : (4)

References (27)
  • 16
    • 27744543070 scopus 로고    scopus 로고
    • note
    • L). All samples were prepared such that the polymer-to-phospholipid ratio was held between 8 mol %. Hydration of the solid components in deionized water was accomplished by repeated cycles of heating (50°C), vortex mixing, and cooling on an ice bath until sample uniformity was achieved. 4-Nitro-4′-(dimethylamino)azobenzene (TCI America, Portland, OR) was introduced as a solid into the preformed complex fluid and dissolution promoted by cycling through the phase transition. Dye-doped poly(methyl methacrylate), PMMA (MW 120 000, Sigma-Aldrich, St. Louis, MO), was prepared by dissolution of the polymer and chromophore at 2 wt % in toluene. Thin solid films were prepared by spin-coating the prefiltered solution onto clean glass substrates. After evaporation of the solvent at room temperature, the films were dried under vacuum to ensure removal of the casting solvent. Film thicknesses were between 0.5 and 1 μm thick as determined by measurement using a profilometer.
  • 17
    • 27744600547 scopus 로고    scopus 로고
    • note
    • m) was taken as the temperature at the peak of the endothermic transition.
  • 18
    • 27744482248 scopus 로고    scopus 로고
    • note
    • UV-vis absorption spectra were recorded on a Gary model 5G UV-vis-NIR spectrophotometer or an Ocean Optics (Dunedin, FL) SD2000 fiber-optic spectrometer that was outfitted with a Peiltier capable of controlling the sample temperature between 10 and 35°C ± 0.7°C.
  • 22
    • 27744599242 scopus 로고    scopus 로고
    • note
    • 2 area, Edmund Optics) covered with a 630 nm interference band-pass filter (Oriel, Stanford, CT) was used to record the voltage (intensity) using an analogdigital converter (PMD-DAQ & SOFTwire program, Measurement Computing, Middleboro, MA). Measurements made on the complex fluids were carried out in a 3 mm square quartz cuvette employing a custom-built Peilter stage for temperature control (±1°C).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.