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Microwave heating of an aqueous solution of citric acid, boric acid and urea affords boron-doped carbon dots (C-dots) with ultrafine size (2–6nm) and quasi-spherical shape. The new dots are freely dispersible in water providing stable, optically transparent dispersions with olive-green color. The optical properties of the dots were studied in respect to their photoluminescence and nonlinear optical...
In the present work, the third-order nonlinear optical response of some polymer/Pd hybrid systems is investigated using 35 ps, 532 nm laser excitation. Two different nanohybrid systems have been prepared, namely a poly(vinyl pyrrolidone) stabilized palladium colloid and a micellar system consisting of a CbzEMAx-b-AEMAy diblock copolymer system with a metallic Pd core. The variation of the copolymers...
The nonlinear optical response of some carbon-based nanomaterials, namely some nanodiamonds and carbon nanoparticles (C-dots) are investigated using infrared nanosecond laser pulses. Both nanocarbons had similar sizes (< 10 nm) and exhibited measurable nonlinear absorption and refraction. Their optical limiting behaviour has been also investigated. Nanodiamonds were found to exhibit remarkable...
For the first time ever we report the nonlinear optical (NLO) properties of carbon dots (C-dots). The C-dots for these experiments were synthesized by mild pyrolysis of lauryl gallate. The resulting C-dots bear lauryl chains and, hence, are highly dispersible in polar organic solvents, like chloroform. Dispersions in CHCl 3 show significant NLO response. Specifically, the C-dots show negative...
The transient nonlinear optical response of some recently synthesized symmetric nickel dithiolene complexes, namely the Ni(etodddt) 2 (etodddt=4,5-(1,4-oxathiane-2,3-diyldithio)-1,3-dithiole), the Ni(pddt) 2 (i.e., bis(6,7-dihydro-5H-[1,4]dithiepine-2,3-ddithiole) nickel)) and the Ni(dddt) 2 (bis(5,6-dihydro-1,4-dithiine-2,3-dithiole) nickel), is studied using Z-scan technique...
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