Bio-INspired GOld metamaterials

Informations projet

BINGO

N° de convention de subvention: 743543

DOI

10.3030/743543

Projet clôturé le 3 Mai 2017

Date de signature de la CE 9 Février 2017

Date de début 1 Mars 2017

Date de fin 28 Février 2019

Financé au titre de

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Coût total

€ 183 454,80

Contribution de l’UE

€ 183 454,80

Coordonné par

THE CHANCELLOR MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE
United Kingdom

Periodic Reporting for period 1 - BINGO (Bio-INspired GOld metamaterials)

Période du rapport: 2017-03-01 au 2019-02-28

Résumé du contexte et des objectifs généraux du projet

The main aim of this research project was to develop nature inspired gold metamaterials. Such metamaterials could open new ways for designing novel devices in the field of imaging, electronics and sensing. The key novelty of the action was to use self-assembled cellulose nanocrystals as templates to fabricate gold morphologies with chiral periodic organization. The cellulose-assisted synthesis of gold metamaterials has a potential to open a new green pathway for fabrication of novel metamaterials and potentially can become a breakthrough technique in metamaterial engineering.

Travail effectué depuis le début du projet jusqu’à la fin de la période considérée dans le rapport et principaux résultats atteints jusqu’à présent

The main achievemnt of the fellowship was the development of a synthesis procedure toward nanoscale gold with chiral geometry. The tasks performed during the internship included: (i) extraction of cellulose nanocrystals from bulk cellulose, (II) their self-assembly to chiral nematic films, (III) wet-chemical synthesis of gold inside chiral cellulose templates. The proposed method allows tuning the dimensions of gold grains while retaining the structural properties of the scaffold. Further optimization of the procedure combined with the advanced optical characterization measurements can lead to the development of new metamaterial.

Progrès au-delà de l’état des connaissances et impact potentiel prévu (y compris l’impact socio-économique et les conséquences sociétales plus larges du projet jusqu’à présent)

The main achievement of the fellowship was the development of a new synthesis concept for the gold synthesis inside chiral cellulose scaffolds. The preliminary experiments demonstrate that the proposed method is a very straightforward and powerful approach, because it allows tuning plasmonic properties of gold and structural coloration of cellulose independently from each other, which to the best of our knowledge, has not been reported yet.
Exploiting natural materials can lead to a more sustainable use of resources, which is a key requirement for the sustainable development of modern society and industry. The development of metamaterials mimicking the natural self-organization of cellulose nanocrystals can open a new area in metamaterial design for super-resolution imaging, ultra-sensitive sensing and cloaking. The method developed in this action can be generalized to semiconductors and metallic materials, other than gold, which can potentially reveal new exciting applications in the fields of sustainable energy, medicine and electronics.

Mosaics made of differently coloured Au/CNC nanocomposites and imaged in front and back illumination

Gold synthesis inside a chiral cellulose film