raman microscopy

A multi-purpose low-energy proton source for tailoring the properties of quantum materials, advanced insulators for optics, and solid cells for energy applications (AMLET)

Italiano

The Kaufman source acquired allows varying the proton beam energy from 10 to 1200 eV with a high degree of reproducibility and control. The same applies to the dose of incorporated protons. These very important parameters are typically hard to control by other systems, such as plasma sources or electrochemical methods. Indeed, Kaufman sources are configured to have the region of gas ionization physically separate from the intended target, avoiding exposure of the samples to intense and potentially damaging electric fields.

Raman microscopy analysis of graphene-based nanocomposite materials under UV-C exposure

In this work, we focused on the investigation of UV-C radiation effects on novel nanomaterials structured with graphene nanoplatelets (GNPs) and DNA. Multifunctional nanocomposites were realized by combining the good electrical conductivity of GNPs with the biocompatibility and UV sensitivity of double-stranded DNA. GNP/DNA nanostructures were prepared by sonication-driven self-assembly in aqueous solution, and then dispersed into a PEDOT:PSS (poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)) matrix.

UV-induced modification of PEDOT:PSS-based nanocomposite films investigated by Raman microscopy mapping

Nanocomposite films with high electrical conductivity and UV sensitivity were prepared by integration of DNA-modified graphene nanoplatelets (GNPs) with a polymer matrix made of poly(3,4-ethylenedioxythio-phene):poly(styrenesulfonate) (PEDOT:PSS). The exceptional electrical properties and mechanical strength of graphene were used to enhance the PEDOT:PSS properties and stability, whereas DNA molecules are sensitive to UV and have an exfoliating effect on the GNPs in aqueous solution.

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