for art history issues. The task is complex however because of the highly heterogeneous character of a paint layer, which consists of a mixture of pigments and a binder on a support. All the components interact and infl uence the ageing process of the paint layer. The work described here is focused on understanding the discoloration over time of a particular pigment, Prussian blue, a synthetic ...

We report here a way for improving the stability of ultramicroelectrodes (UME) based on hexacyanoferrate-modified metals for the detection of hydrogen peroxide. The most stable sensors were obtained by electrochemical deposition of six layers of hexacyanoferrates (HCF), more specifically, an alternating pattern of three layers of Prussian Blue and three layers of Ni-HCF. The microelectrodes mod...

BACKGROUND Cell tracking is a powerful tool to understand cellular migration, dynamics, homing and function of stem cell transplants. Nanoparticles represent possible stem cell tracers, but they differ in cellular uptake and side effects. Their properties can be modified by coating with different biocompatible polymers. To test if a coating polymer, poly(L-lysine), can improve the biocompatibil...

This work reports the use of modified screen-printed carbon electrodes (SPCEs) for identification three drugs abuse and two habitual cutting agents, caffeine paracetamol, combining voltammetric sensing chemometrics. In order to achieve this goal, codeine, heroin morphine were subjected Square Wave Voltammetry (SWV) at pH 7, in elucidate their electrochemical fingerprints. The optimized SPCEs el...

We studied the use of Prussian blue nanoparticles (PBNPs) as novel nanocarriers for sending DNA drugs into cancer cells. 11-mercaptoundecanoic acid (MUA) was used to functionalize the surfaces of PBNPs (nanocubes with an average dimension of 75 nm) for subsequent covalent grafting of a 33-mer DNA drug with a FAM reporter at the 3' end. The PBNPs synthesis and DNA drug conjugation were character...

Monitoring the evolution of potassium carriers during charge/discharge Prussian blue batteries by operando K-edge X-ray absorption spectroscopy.

Glucose-6-phosphate (G6P) plays an important role in carbohydrate metabolism of all living organisms. Compared with the conventional analytical methods available for estimation of G6P, the biosensors having relative simplicity, specificity, low cost, and fast response time are a promising alternative. We have reported a G6P biosensor based on screen-printed electrode using Prussian Blue (PB) na...