1,721,164 research outputs found
Interface electronic device for reading an output signal and for controlling and conditioning a three-electrodes amperometric sensor
No full textElectronic devices and methods for reading an output signal and controlling a three-electrode electro-chemical amperometric sensor include an operational amplifier having a non-inverting input adapted to receive a biasing electric potential and an inverting input connectable to a reference electrode of the sensor. The devices further include one or more MOS transistors connected to the operational amplifier, with a first MOS transistor connectable to the collector electrode of the sensor to receive or supply a MOS transistor channel current representative of the cell current generated in the sensor, and a second MOS transistor connectable to a reference voltage by a conductor or a resistor. The resistance is lower than the cell impedance such that the current in the second MOS transistor channel depends on the current in the first MOS transistor channel through a nonlinear gain dependent on the resisto
IDEAS IN CHEMISTRY AND MOLECULAR SCIENCES: ADVANCES IN NANOTECHNOLOGY, MATERIALS AND DEVICES
No full text
Tomorrow’s Chemistry Today: Concepts in Nanoscience, Organic Materials and Environmental Chemistry, second edition
No full textTomorrow’s Chemistry Today: Concepts in Nanoscience, Organic Materials and Environmental Chemistry
No full textProviding a glimpse into the future, the young scientists
contributing here were considered to be the most important for tomorrow's chemistry and materials science. They present the state of the art in their particular fields of research, with topics ranging from new synthetic pathways and nanotechnology to green chemistry.
Of major interest to organic chemists, materials scientists and biochemists
Comparative synthesis and characterization of zinc oxide nanopowders via chemical and biological methods: integration into polymer matrices for surfaces.
Full text linkIn recent years, nanomaterial science has gained a lot of attention to produce innovative materials with several unique applications; moreover, approaches for nanomaterial production have been studied in depth to obtain new large-scale and cost-effective methods.This thesis aims to develop and characterize composite materials based on zinc oxide nanoparticles, known for their photocatalytic properties, dispersed into a polymer matrix. These nanoparticles were synthetized using both chemical and biological routes, and the obtained products were characterized and compared through various physical-chemical techniques.Furthermore, a polymer matrix was synthesized from several components, consisting of polydimethylsiloxane (PDMS), dopamine (Dopa), and isophorone diisocyanate (IPDI), with different chemical and physical properties. This one results in a copolymer with excellent adhesion capabilities.The following thesis is divided into six chapters, which illustrate the topics covered and explain the techniques used for the synthesis of nanopowders, then describe the work carried out and discuss the results.In detail, the first chapter introduces the concept of nanotechnology, with particular interest in the development of nanoparticles and the most common applications and production techniques. The second chapter focuses on zinc oxide with a general overview of this catalyst's properties and applications. The third chapter deals with polymeric materials and their characteristics and applications. The fourth chapter highlights the potential of each characterization technique, describing materials and methods used to synthesize and characterize zinc oxide nanoparticles and the polymer matrix.Results obtained from the characterization are shown in the fifth chapter. Instead, chapter six focuses on the photocatalytic tests performed on the system materials under study
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