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Chemical preparation of core - shell nanoparticles

Kalska-Szostko B., Wykowska U., Basa A., Szymański K.

Nukleonika

2013

Vol. 58, No. 1

35-38

Nanoparticles obtained during layer-by-layer chemical deposition have been obtained. The particles diameter varied between 5 nm and 9 nm and can be tuned by changing molarity of the synthesis ingredients. The intention was the creation of copper or iron oxide layer during the process. Layer composition were changed using Cu rich or Fe rich ingredients. Magnetic properties of the particles strongly depend on the composition of covered material, indicating for their core-shell structure.

Multi-scan Voltammetric Determination of Carbohydrates Noble Metal Microelectrodes following Flow Injection and After Capillary Electrophoresis Separation

Basa A., Krogulec T., Barański A.

Polish Journal of Chemistry

2004

Vol. 78 / nr 9

1635-1654

Two multi-scan techniques: cyclic voltammetry (CV) and fast Fourier transform squarewave voltammetry (FFT SWV) with Pt and Au microelectrodes were tested for the determination of five carbohydrates (lactose, sucrose, glucose, fructose and ribose) under FIA conditions. The best analytical results were obtained for the FFT SWV with a Pt microelectrode; in this case the detection limits were below 2X10-7 mol . dm-3 for all studied analytes. In addition, both methods were applied for end-capillary detection in capillary electrophoresis (CE) and tested during an analysis of a mixture of eight sugars. The advantages of scanning methods over constant potential (amperometric) detection methods are also discussed.