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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/3707

Title: Determination of the optical properties of PNIPAAm gels used in biological applications
Authors: Singh, A
Karsten, AE
Mputle, I
Chetty, A
Naidoo, K
Keywords: Optical properties
Poly(N-isopropylacrylamide)
PNIPAAm gels
Reduced scattering coefficient
Light propagation
Absorption
Biomedical optics
Biological applications
Hydrophilic
Hydrophobic
Issue Date: Jul-2009
Citation: Singh, A, Karsten, AE, Mputle I et al. 2009. Determination of the optical properties of PNIPAAm gels used in biological applications. ECBO 2009: European Conference on Biomedical Optics, Munich, 14–18 June 2009, pp 1-7
Abstract: Poly(N-isopropylacrylamide) that is PNIPAAm is a temperature sensitive smart material which displays a lower critical solution temperature (LCST) at 33-35oC. At the lower critical solution temperature, the gel changes from hydrophilic to hydrophobic which has significant consequences in cell culturing. The first known measurements of the optical properties that is absorption (µa) and reduced scattering (µ's) coefficients, as a function of temperature, of a series of crosslinked PNIPAAm gels, using an integrating sphere setup, is presented at a wavelength of 632.8 nm. These properties showed a direct correlation between the scattering coefficient and the crosslinker density for the gels. The absorption properties correlated well with the known absorption characteristics of these gels.
Description: ECBO 2009: European Conference on Biomedical Optics, Munich, 14–18 June 2009
URI: http://hdl.handle.net/10204/3707
ISBN: 9780819476494
Appears in Collections:Laser physics and technology
Manufacturing science and technology
General science, engineering & technology

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