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Photopolymerization by Evanescent Waves and Spectroscopic Study of Mechanochemical Response of the Polymer Network on an Optical Fiber Sergey V. Kazakov, Department of Chemistry & Physical Sciences, Pace University, NY ►The major objective of this project is to fabricate a polymer network on the cylindrical side-surface of an optical fiber core. The mechanism of controlled polymerization by evanescent waves has been studied to demonstrated that an optical fiber with open side surface of its core connected to a spectrometer is an apparatus for polymerization and analytical device in one. ►Other outcomes from the project include : ►temperature sensitive hydrogel supported by fiber core can selectively absorb light of different spectral composition: the higher the temperatures, the wider is the spectral range of absorption (scattering in the whispering-gallery-mode) Fiber core 120 110 22C 32.7C 33.4C 35.1C 100 Transmittance, % ◄light emitting polymer, cross-linked around a fiber core, is a prerequisite for an optically pumped organic laser (energy-efficient lighting) ◄cross-linked polyelectrolyte on a fiber core can work as a hydrogen storage container with a high ionic capacity and spectroscopic control of accumulation and release of hydrogen ions (alternative energy source) Polymer network 90 36.5C 39.8C 39.8C 42.1C 80 44.7C 70 55.2C 60 50 200 300 400 500 600 700 800 900 Wavelength, nm ◄cylindrical polymer network itself is a prerequisite for a supported 2D-single macromolecule with the world’s highest level of expansion and contraction, the most sensitive externally induced mass transfer, and the record fastest response to different stimuli (energy conversion) ►chemical and biological specificity of the polymer determines the diversity of practical applications, such as: cushion between “wet” living entities, like cells, organelles, liquid media of human body, etc., and “solid” compartments of microelectronics or spectroscopic devices: a hydrogel is “wet” enough to keep the living entities alive and is “solid” enough to support them on a microchip (signal and energy transduction) spectroscopy of single cell, organelle, or microorganism (biofuel)