Claudio M Mari | Università degli Studi di Milano-Bicocca (original) (raw)

Papers by Claudio M Mari

Organic Letters, 2013

A new heteroarylene-vinylene donor-acceptor low bandgap polymer, the poly(DEHT-V-BTD), containing... more A new heteroarylene-vinylene donor-acceptor low bandgap polymer, the poly(DEHT-V-BTD), containing vinylene-spaced efficient donor (dialkoxythiophene) and acceptor (benzothiadiazole) moieties, is presented. Electropolymerization has been carried out by several electrochemical techniques and the results are compared. In particular, the pulsed potentiostatic method was able to provide layers with sufficient amounts of material. Cyclic voltammetries showed reversible behavior towards both p-and n-doping. The HOMO, LUMO, and bandgap energies were estimated to be −5.3, −3.6 and 1.8 eV, respectively. In situ UV-Vis measurements have established that the presence of the vinylene group stabilizes the formation of polaronic charge carriers even at high doping levels.

Chemistry of …, Jan 1, 2008

We present the design, synthesis, and structural characterization of short conjugation length squ... more We present the design, synthesis, and structural characterization of short conjugation length squaraine structures having relevant two-photon absorption (TPA) performances in the 700− 800 nm regime. We show in particular how it is possible to tune the TPA performances, only marginally affecting the linear absorption.

Journal of the …, Jan 1, 2008

Singlet oxygen sensitization by organic molecules is a topic of major interest in the development... more Singlet oxygen sensitization by organic molecules is a topic of major interest in the development of both efficient photodynamic therapy (PDT) and aerobic oxidations under complete green chemistry conditions. We report on the design, synthesis, biology, and complete spectroscopic characterization (vis-NIR linear and two-photon absorption spectroscopy, singlet oxygen generation efficiencies for both one-and two-photon excitation, electrochemistry, intrinsic dark toxicity, cellular uptake, and subcellular localization) of ...

Sensors and Actuators, 1988

ABSTRACT The properties of a thick film of non-stoichiometric cerium dioxide, used as an oxygen e... more ABSTRACT The properties of a thick film of non-stoichiometric cerium dioxide, used as an oxygen electrode in a high-temperature solid-state oxygen meter, have been investigated. Experiments were carried out in a wide range of temperature (650 – 1000 °C) and CO/CO2 gas mixture composition (75% - 9% CO).Results are reported and compared with those obtained, in the same conditions, with a porous platinum electrode made from Hanovia 6082 platinum paste.

Sensors and Actuators B: Chemical, 1992

The solid-state electrochemical cell Pt(Ag[Ag+ -/I"-1 a uminalAgClICl,(p),Pt has been investigate... more The solid-state electrochemical cell Pt(Ag[Ag+ -/I"-1 a uminalAgClICl,(p),Pt has been investigated. The e.m.f. as a function of chlorine partial pressure (9.2-1044 Pa) and temperature (70-340 "C) has been measured. Departures of the experimental from the theoretical values are observed. Preliminary experiments on response time have been carried out and the relevant data in terms of a normalized function containing a phenomenological parameter are presented.

J Eur Ceram Soc, 2005

Composites prepared by mixing La0.83Sr0.17Ga0.83Mg0.17O2.83 (LSGM) and La0.8Sr0.2MnO3 (LSM) powde... more Composites prepared by mixing La0.83Sr0.17Ga0.83Mg0.17O2.83 (LSGM) and La0.8Sr0.2MnO3 (LSM) powders (1−x)LSGM−xLSM (x=0, 0.01, 0.05, 0.25, 0.50, 0.75 and 1), have been studied. Composites have been sintered at 1300°C in air for 2h, and their relative densities vary in the range 89–85%. Characterization includes phase analysis based on X-ray powder diffraction data taken at room temperature after thermal treatments at temperatures

Journal of Power Sources, 2016

Solid State Ionics, 1990

Two H-pyrochlore compounds were prepared by ceramxc synthesis of K ÷ salts and H + ion exchange. ... more Two H-pyrochlore compounds were prepared by ceramxc synthesis of K ÷ salts and H + ion exchange. A thorough electrical characterization by complex impedance spectroscopy was performed, as well as a preliminary Raman investigation through all the frequency range.

Materials Chemistry, 1980

ABSTRACT Nickel lanthanum oxide “NiLa204” has been tested as electrode material in solid state de... more ABSTRACT Nickel lanthanum oxide “NiLa204” has been tested as electrode material in solid state devices for the accurate determination of oxygen in mixtures with inert gas in a wide range of temperature and oxygen partial pressures. The results are compared with those obtained with an oxygen meter employing a porous platinum electrode.

Sensors and Actuators B: Chemical, 1990

The solid state galvanic chain Pt, Agl(AgzSO&-(Li~S04),slS01, O,(air), Pt is used in order to stu... more The solid state galvanic chain Pt, Agl(AgzSO&-(Li~S04),slS01, O,(air), Pt is used in order to study the response time of an SO? sensor as a function of the configuration of the measuring electrode as well as the thickness of the electrolyte. A discussion concerning the influence of both parameters on the response time is presented and a proposal $0 improve the performance of the sensor is suggested.

Materials Chemistry, 1981

Fourth E.C. Photovoltaic Solar Energy Conference, 1982

ABSTRACT An investigation has been conducted on the possibility of segregating the residual impur... more ABSTRACT An investigation has been conducted on the possibility of segregating the residual impurities in a matrix o solar cell-grade silicon, through a crystallization process that is carried out either far from equilibrium conditions or with a residual impuritiy content that exceeds solubility limits. Chemical analyses, together with SEM, X-ray microanalysis and Auger spectroscopy, indicate that residual impurities segregate either at grain boundaries or within single grains, in the manner of silicides. In view of this, chemical bonding is identified as the driving force for excess impurity removal. It is suggested that grain boundaries may act as sinks for impurities, although it is also possible that infragranular precipitates coalesce in a network of subgrain boundaries. The local density of precipitates varies with the thermal history of a crystal.

Materials Chemistry, 1979

ABSTRACT CeO2 has been used as the active electrode material in a solid state device for the dete... more ABSTRACT CeO2 has been used as the active electrode material in a solid state device for the determination of the oxygen partial pressure in CO/CO2 mixtures. Gaseous mixtures with molar ratio CO/CO2 from 3:1 to 1:3 have been investigated in the 600–850°C temperature range. The performance of this oxygen electrode has been proved better than that of the porous platinum one, because it shows a comparatively better accuracy and a faster time of equilibration with the gaseous atmosphere.

Sensors and Actuators, 1987

ABSTRACT In view of the growing development and interest in polymers as basic materials for elect... more ABSTRACT In view of the growing development and interest in polymers as basic materials for electronic applications in semiconductor devices, an attempt to assess their possibilities as sensitive elements is presented. Some considerations about the electrical conductivity of polymeric materials as well as its relation with some physical and chemical properties are reported, and a tentative classification of possible devices is given.