Holographic Sensors by Ali Kemal Yetisen

By Ali Kemal Yetisen

This thesis provides a theoretical and experimental procedure for the fast fabrication, optimization and checking out of holographic sensors for the quantification of pH, natural solvents, steel cations, and glucose in solutions.

Developing non-invasive and reusable diagnostics sensors that may be simply synthetic will aid the tracking of high-risk participants in any medical or point-of-care environment. Sensor fabrication ways defined comprise silver-halide chemistry, laser ablation and photopolymerization. The sensors hire off-axis Bragg diffraction gratings of ordered silver nanoparticles and localized refractive index alterations in poly (2-hydroxyethyl methacrylate) and polyacrylamide motion pictures. The sensors exhibited reversible Bragg top shifts, and diffracted the spectrum of narrow-band gentle over the wavelength variety λpeak ≈ 495-1100 nm. scientific trials of glucose sensors within the urine samples of diabetic sufferers tested that they provide enhanced functionality in comparison to advertisement high-throughput urinalysis units. finally, a normal phone program to quantify colorimetric assessments was once constructed and verified for either Android and iOS working platforms. The sensing platform and telephone software can have implications for the improvement of inexpensive, reusable and equipment-free point-of-care diagnostic devices.

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Holographic Sensors

This thesis provides a theoretical and experimental method for the swift fabrication, optimization and trying out of holographic sensors for the quantification of pH, natural solvents, steel cations, and glucose in options. constructing non-invasive and reusable diagnostics sensors that may be simply synthetic will aid the tracking of high-risk members in any scientific or point-of-care surroundings.

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1039/C2ra20156a 117. Nie J, Zhang Y, Lin L, Zhou C, Li S, Zhang L, Li J (2012) Low-cost fabrication of paperbased microfluidic devices by one-step plotting. Anal Chem 84(15):6331–6335. 1021/ ac203496c 118. Ratnarathorn N, Chailapakul O, Henry CS, Dungchai W (2012) Simple silver nanoparticle colorimetric sensing for copper by paper-based devices. Talanta 99:552–557. 1016/j. 033 119. Rohrman BA, Richards-Kortum RR (2012) A paper and plastic device for performing recombinase polymerase amplification of HIV DNA.

For example, refractive-index tuneable oxide materials such as WO3, VO2, and BaTiO3 have been incorporated in these matrices to produce photonic structures that are sensitive to electric field or temperature [29]. The crystalline colloidal arrays infiltrated with liquid crystals optically responded to an applied external electric field and an increase in the temperature of the device [30–32]. Numerous fabrication strategies and materials science have been developed to build responsive photonic structures for applications in sensing chemical stimuli, temperature variation, light, electrical and magnetic fields and mechanical forces [33–40].

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