Environmental Science and Pollution Research, 2022
The presence of microplastics in the sea is a global issue widely studied and discussed in the la... more The presence of microplastics in the sea is a global issue widely studied and discussed in the last years. The whole marine ecosystem is now considered at high risk because of their presence and abundance in every studied environment all over the world because polymeric materials commonly constitute the main raw materials in contemporary industrial production. The presented study reports the results obtained from surface seawater monitoring of two sampling transects in the coastal area close to the Venice Lagoon (Italy) inlet, investigated in order to get new information about the presence and relevance of plastic pollution. Plastic particles collected by means of a manta net (0.3-mm mesh size) have been characterized in detail by utilizing a multi-technique approach in order to discriminate them by typology, dimension, colour, spatial density and chemical composition. Such information permitted the individuation of subgroups (specific groups) of plastic micro-debris in this Northern Adriatic area.
The electrochemical preparation of arrays of copper ultramicro-wires (CuUWs) by using porous memb... more The electrochemical preparation of arrays of copper ultramicro-wires (CuUWs) by using porous membranes as templates is critically revisited, with the goal of obtaining cheap but efficient substrates for surface enhanced Raman spectroscopy (SERS). The role of the materials used for the electrodeposition is examined, comparing membranes of anodized aluminum oxide (AAO) vs. track-etched polycarbonate (PC) as well as copper vs. glassy carbon (GC) as electrode material. A voltammetric study performed on bare electrodes and potentiostatic tests on membrane coated electrodes allowed the optimization of the deposition parameters. The final arrays of CuUWs were obtained by chemical etching of the template, with NaOH for AAO and CH2Cl2 for PC. After total etching of the template, SERS spectra were recorded on CuUWs using benzenthiol as SERS probe with known spectral features. The CuUW substrates displayed good SERS properties, providing enhancement factor in the 103–104 range. Finally, it was demonstrated that higher Raman enhancement can be achieved when CuUWs are decorated with silver nanostars, supporting the formation of SERS active hot-spots at the bimetallic interface.
Environmental Science and Pollution Research, 2022
The presence of microplastics in the sea is a global issue widely studied and discussed in the la... more The presence of microplastics in the sea is a global issue widely studied and discussed in the last years. The whole marine ecosystem is now considered at high risk because of their presence and abundance in every studied environment all over the world because polymeric materials commonly constitute the main raw materials in contemporary industrial production. The presented study reports the results obtained from surface seawater monitoring of two sampling transects in the coastal area close to the Venice Lagoon (Italy) inlet, investigated in order to get new information about the presence and relevance of plastic pollution. Plastic particles collected by means of a manta net (0.3-mm mesh size) have been characterized in detail by utilizing a multi-technique approach in order to discriminate them by typology, dimension, colour, spatial density and chemical composition. Such information permitted the individuation of subgroups (specific groups) of plastic micro-debris in this Northern Adriatic area.
The electrochemical preparation of arrays of copper ultramicro-wires (CuUWs) by using porous memb... more The electrochemical preparation of arrays of copper ultramicro-wires (CuUWs) by using porous membranes as templates is critically revisited, with the goal of obtaining cheap but efficient substrates for surface enhanced Raman spectroscopy (SERS). The role of the materials used for the electrodeposition is examined, comparing membranes of anodized aluminum oxide (AAO) vs. track-etched polycarbonate (PC) as well as copper vs. glassy carbon (GC) as electrode material. A voltammetric study performed on bare electrodes and potentiostatic tests on membrane coated electrodes allowed the optimization of the deposition parameters. The final arrays of CuUWs were obtained by chemical etching of the template, with NaOH for AAO and CH2Cl2 for PC. After total etching of the template, SERS spectra were recorded on CuUWs using benzenthiol as SERS probe with known spectral features. The CuUW substrates displayed good SERS properties, providing enhancement factor in the 103–104 range. Finally, it was demonstrated that higher Raman enhancement can be achieved when CuUWs are decorated with silver nanostars, supporting the formation of SERS active hot-spots at the bimetallic interface.
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Papers by Giulio POJANA
ecosystem is now considered at high risk because of their presence and abundance in every studied environment all over the
world because polymeric materials commonly constitute the main raw materials in contemporary industrial production. The
presented study reports the results obtained from surface seawater monitoring of two sampling transects in the coastal area
close to the Venice Lagoon (Italy) inlet, investigated in order to get new information about the presence and relevance of
plastic pollution. Plastic particles collected by means of a manta net (0.3-mm mesh size) have been characterized in detail
by utilizing a multi-technique approach in order to discriminate them by typology, dimension, colour, spatial density and
chemical composition. Such information permitted the individuation of subgroups (specific groups) of plastic micro-debris
in this Northern Adriatic area.
enhancement factor in the 103–104 range. Finally, it was demonstrated that higher Raman enhancement can be achieved when CuUWs are decorated with silver nanostars, supporting the formation of SERS active hot-spots at the bimetallic interface.
ecosystem is now considered at high risk because of their presence and abundance in every studied environment all over the
world because polymeric materials commonly constitute the main raw materials in contemporary industrial production. The
presented study reports the results obtained from surface seawater monitoring of two sampling transects in the coastal area
close to the Venice Lagoon (Italy) inlet, investigated in order to get new information about the presence and relevance of
plastic pollution. Plastic particles collected by means of a manta net (0.3-mm mesh size) have been characterized in detail
by utilizing a multi-technique approach in order to discriminate them by typology, dimension, colour, spatial density and
chemical composition. Such information permitted the individuation of subgroups (specific groups) of plastic micro-debris
in this Northern Adriatic area.
enhancement factor in the 103–104 range. Finally, it was demonstrated that higher Raman enhancement can be achieved when CuUWs are decorated with silver nanostars, supporting the formation of SERS active hot-spots at the bimetallic interface.