<em>PADOVA</em>

La sede ICMATE di Padova svolge attività di ricerca e di trasferimento tecnologico in diversi settori della chimica, dei materiali e dell’energetica.

VISITA

PADOVA PADOVA
Direzione

<em>MILANO</em>

La sede ICMATE di Milano svolge attività di ricerca di base ed applicata: le tecnologie dei materiali strutturali e funzionali e la fluidodinamica e tecnologia della combustione.

VISITA

MILANO MILANO
Sede distaccata

<em>GENOVA</em>

La sede ICMATE di Genova è impegnata in svariate tematiche dalla progettazione di tecniche sperimentali di avanguardia al trasferimento di tecnologie sviluppate al mondo industriale.

VISITA

GENOVA GENOVA
Sede distaccata

<em>LECCO</em>

La sede ICMATE di Lecco si configura come uno dei pochi centri in Italia in grado di operare nella metallurgia secondaria dei materiali metallici avanzati.

VISITA

LECCO LECCO
Sede distaccata

DIFFUSIONE DELLA CONOSCENZA

Editor’s choice in Journal of Cultural Heritage, Volume 51, 2021

Few examples of dichroic (from Greek dikhroos , two-coloured) glass vessels from Hellenistic and Roman antiquities are known, the most famous being the Lycurgus cup exposed at British Museum. This cup, prepared by ancient roman glassmakers (4th cent. AD), is ornamented by a carved freeze with the scene of Lycurgus death and its dichroic nature is still exciting the researchers. In fact, the optical properties of the used glass are very unusual even for a modern observer: it has a red wine color in transmitted light and olive-greenish in reflected light, the dichroic properties being observed for the whole cup, not only for some specific coating.

Previous studies reported that the Lycurgus cup contains some quantity of bimetallic Ag-Au nanoparticles (NPs) and suggested that these NPs are responsible for both red plasmonic color and green reflections. It is known that red glasses are colored by nanoparticles: ruby gold glass colored in various shades of red, pink or crimson with gold nanoparticles is well known since at least the end of the 17th century. At the same time, the small size of the nanoparticles prevents them from scattering light. Gold ruby glasses are often transparent and do not demonstrate all the optical properties that the Lycurgus cup glass exhibits.

Actually, the preparation of nanoparticles exhibiting dichroic properties is not simple: several efforts have been made in the past and it has been found that the differences in color are related to the size and shape of the particles. Very recently it has been reported that it is possible to synthesize photonic crystals with specific thickness exhibiting two-way structural colors in the reflection and transmission directions similar to those of Lycurgus cup.

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News & Eventi

Evento Nazionale Biotech on line 25 novembre 2021

III WORKSHOP NAZIONALE BIOTECH

L’ECONOMIA DEL BIOTECH OGGI: CREARE VALORE UNENDO RICERCA E IMPRESA

FOCUS SU ECOSISTEMA SALUTE, SMART FOOD, RICERCA E INNOVAZIONE

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B2B Meet&Match event at Food Technology 2021 - 1-2 December 2021

Il CNR partner del Consorzio FriendEurope co-organizza l’evento internazionale B2B Meet&Match event at Food Technology 2021 - 1-2 December 2021

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