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Analytical Sciences
Volumn 22, Issue 10, 2006, Pages 1283-1289
Raman microspectroscopy/imaging study on phase-vanishing processes of fluorous biphase systems in microchannel-microheater chips
Author keywords

[No Author keywords available]
Indexed keywords

HEATING EQUIPMENT; HEPTANE;
EID: 33846809584     PISSN: 09106340     EISSN: 13482246     Source Type: Journal    
DOI: 10.2116/analsci.22.1283     Document Type: Article
Times cited : (4)
References (36)
  • 27
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    • Determined in the present study by gravimetry
    • Determined in the present study by gravimetry.
  • 28
    • 49749086028 scopus 로고    scopus 로고
    • On the bases of the dimensions of the fabricated microheater (see the Experimental section) and the resistivity of the metal (2.35 × 10 -8 or 12.9 × 10-8 Ω m for Au or Cr, respectively, the generated heat (q) at the heater at V, 4.5 V was estimated to be q, 0.018 J s-1. Assuming the thermal conductivity (kglass, ∼1 W K-1 m-1 at room temperature) and the thickness of the glass substrate used (dx, ∼0.17 mm, the q value and the area of the heater (A, 3 × 10-8 m2) gave the solution temperature in the microchannel to be ∼100°C on the basis of Fourier's law. In the experiments, cooling of both solution and glass substrate takes place efficiently, so that the actual solution temperature should be much lower than 100°C
    • 2) gave the solution temperature in the microchannel to be ∼100°C on the basis of Fourier's law. In the experiments, cooling of both solution and glass substrate takes place efficiently, so that the actual solution temperature should be much lower than 100°C.
  • 29
    • 49749151962 scopus 로고    scopus 로고
    • In the downstream side of the microheater, the mixed solution should be separated into two phases upon cooling. However, what we observed in the present experiments was an emulsion-like behavior: formation of FC-72 or C 7H16 droplets in the C7H16 or FC-72 phase, respectively. We anticipate that further optimization of the experimental conditions (channel dimension, channel surface treatment, and so on) will achieve separation of the solution into two phases
    • 16 or FC-72 phase, respectively. We anticipate that further optimization of the experimental conditions (channel dimension, channel surface treatment, and so on) will achieve separation of the solution into two phases.
  • 31
    • 49749126634 scopus 로고
    • in Japanese, Gakkai Shuppan Center, Tokyo
    • H. Hamaguchi and A. Hirakawa, "Raman Bunkou-Hou (in Japanese)", 1988, Gakkai Shuppan Center, Tokyo, 233.
    • (1988) Raman Bunkou-Hou , pp. 233
    • Hamaguchi, H.1    Hirakawa, A.2
  • 33
    • 49749121368 scopus 로고    scopus 로고
    • Although the mosaic-like structure can be seen in Fig. 8 particularly in Fig. 8b, this will not correspond to the microstructures of the liquid itself. Such structure is caused by the spatial resolution of the Raman imaging experiments; a Raman excitation laser beam with the diameter of ∼6 μm is stepped 6.25 and 5.0 μm along the X and Y directions, respectively
    • Although the mosaic-like structure can be seen in Fig. 8 (particularly in Fig. 8b), this will not correspond to the microstructures of the liquid itself. Such structure is caused by the spatial resolution of the Raman imaging experiments; a Raman excitation laser beam with the diameter of ∼6 μm is stepped 6.25 and 5.0 μm along the X and Y directions, respectively.
  • 34
    • 2542428908 scopus 로고    scopus 로고
    • R. E. Oosterbroek and A. van den Berg ed, Elsevier, Amsterdam
    • R. E. Oosterbroek and A. van den Berg (ed.), "Lab-on-a-Chip", 2003, Elsevier, Amsterdam.
    • (2003) Lab-on-a-Chip
  • 36
    • 49749091953 scopus 로고    scopus 로고
    • J. A. Riddick and W. B. Bunger, Techniques of Chemistry: Organic Solvents, 3rd ed., 1970, II, Wiley-Interscience, New York. The η value of FC-72 at 25°C was determined in the present study by using an Ostwald viscometer.
    • J. A. Riddick and W. B. Bunger, "Techniques of Chemistry: Organic Solvents", 3rd ed., 1970, Vol. II, Wiley-Interscience, New York. The η value of FC-72 at 25°C was determined in the present study by using an Ostwald viscometer.

* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.