Aquatic Fate and Ecotoxicology Effect of ZnS:Mn Quantum Dots on in Fresh Water.

With the increasing integration of nanomaterials into daily life, the potential ecotoxicological impacts of nanoparticles (NPs) have attracted increased attention from the scientific community. This study assessed the ecotoxicity of ZnS quantum dots (QDs) doped with varying molar concentrations of Mn on . The ZnS:Mn QDs were synthesized using the polyol method.

Preparation, Characterization and Biocompatibility Studies of Cotton Cellulose Nanofibers.

Cellulose nanofibers have mechanical properties that make them very attractive in a myriad of fields such as biomedicine, tissue engineering, biosensors, cosmetics and food packet products. To evaluate the potential health risks of airborne cellulose nanofibers, the cellulose nanofiber was prepared and characterized and then its pulmonary potential toxicity to a mouse model was studied. Cellulose nanofiber has been prepared by acid hydrolysis of cotton cellulose and characterized by transmission electron microscopy, zeta potential and X-ray diffraction analysis.

Monitoring photosynthetic microorganism activity with an electrolyte-gated organic field effect transistor.

Among organic thin film transistors (OTFTs), Organic Electrochemical Transistors (OECTs) have been extensively used for cell monitoring while Electrolyte-Gated Organic Field-Effect Transistors (EGOFETs) have never been described for that kind of application. However, EGOFETs are well adapted for this use because, as well as OECTs, they can operate directly in aqueous solutions such as cells culture media, but they offer much a higher on/off ratio which could lead to better sensitivity. As a proof of concept, we propose herein to monitor the photosynthetic activity of a cyanobacterium (Anabaena flos-aquae) contained within an EGOFET's electrolyte.

Ecotoxicological Studies of ZnO and CdS Nanoparticles on Photosynthetic Microorganism in Seine River Water.

Seine river water was used as natural environmental medium to study the ecotoxicological impact of ZnO and CdS nanoparticles and Zn and Cd free ions using as a biological target. It was demonstrated by viability tests and photosynthetic activity measurements that free Zn ( = 2.7 × 10 M) is less toxic than free Cd and ZnO nanoparticles ( = 1.

The polyol process: a unique method for easy access to metal nanoparticles with tailored sizes, shapes and compositions.

After about three decades of development, the polyol process is now widely recognized and practised as a unique soft chemical method for the preparation of a large variety of nanoparticles which can be used in important technological fields. It offers many advantages: low cost, ease of use and, very importantly, already proven scalability for industrial applications. Among the different classes of inorganic nanoparticles which can be prepared in liquid polyols, metals were the first reported.