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ACCURATE MEASUREMENT OF THE COMPLEX REFRACTIVE INDEX AND PARTICLE SIZE IN HIGHLY TURBID MEDIA

Nguemaha, Valery Marcel
http://rave.ohiolink.edu/etdc/view?acc_num=miami1376416227

Abstract Details

2013, Master of Science, Miami University, Physics.
We demonstrate a first accurate measurement of the complex refractive index and particle size in highly turbid media. We measure the reflectance of a divergent laser beam from the sample surface by incorporating into traditional Fresnel theory angle dependent penetration of the incident light into the turbid medium. The reflectance is measured over the full range of incident angles, i.e., for reflectivity-values going from unity in the total internal reflection regime to nearly zero when almost all the light is transmitted. This methodology is in direct contrast with the prevalent approach in turbid media of focusing on only the critical angle region which is just a small subset of the reflectance data. To validate our model, we present particle size analysis in various idealized monodisperse solutions with a large range of particle sizes and compare our results with independent measurements performed using dynamic light scattering (DLS).
Samir Bali, PhD (Advisor)
Lalit Mohan Bali, PhD (Advisor)
Perry Rice, PhD (Committee Member)
Paul Urayama, PhD (Committee Member)
58 p.
Physics
Complex refractive index, Highly turbid media, Reflectance measurement, Critical angle

Recommended Citations

Citations

  • Nguemaha, V. M. (2013). ACCURATE MEASUREMENT OF THE COMPLEX REFRACTIVE INDEX AND PARTICLE SIZE IN HIGHLY TURBID MEDIA [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1376416227

    APA Style (7th edition)

  • Nguemaha, Valery. ACCURATE MEASUREMENT OF THE COMPLEX REFRACTIVE INDEX AND PARTICLE SIZE IN HIGHLY TURBID MEDIA. 2013. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1376416227.

    MLA Style (8th edition)

  • Nguemaha, Valery. "ACCURATE MEASUREMENT OF THE COMPLEX REFRACTIVE INDEX AND PARTICLE SIZE IN HIGHLY TURBID MEDIA." Master's thesis, Miami University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1376416227

    Chicago Manual of Style (17th edition)

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© 2013, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.