We are happy to share new papers of A. Paszternák (founder of Nanopaprika) and his colleagues:

Mária Pávai, Judith Mihály, András Paszternák

pH and CO2 Sensing by Curcumin-Coloured Cellophane Test Strip

Food Analytical Methods, 2015

Curcumin-coloured cellophane test strip—fabricated without any synthetic material—is used to determine in situ the instantaneous pH changes in liquids and in the air. A low-cost, portable sensor array for possible medical and food–industrial application is developed. Next to the pH detection, curcumin-coloured test strip can be applied as CO2 monitoring sensor, too. Ongoing processes and the structural changes are followed by ultraviolet-visible (UV-VIS) spectrophotometer, attenuated total reflection-fourier transform infrared spectroscopy (ATR-FTIR) and atomic force microscope (AFM).

András Paszternák; David Zitoun

Polymeric Honeycombs Decorated by Nickel Nanoparticles

Science of Advanced Materials Volume 7, Number 3, March 2015, pp. 489-495

Porous three-dimensional metal mesostructures have a wide range of applications in different fields of micro/nanotechnology. We report on the spontaneous formation of honeycomb structures from colloidal crystals of polystyrene beads and their simultaneous decoration with magnetic Ni nanoparticles. The honeycomb forms upon simple dipping of the colloidal crystal in an organic solution of an organometallic precursor. Ni nanoparticle formation is based on the gentle thermal decomposition of the organometallic precursor Ni(η4–C8H12)2 at a temperature as low as 80 °C, compatible with the polymeric matrix. Combination of different solvents and preparation parameters are used to gain an insight into the formation mechanism of Ni decorated honeycomb structure.

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