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Dr Bruno Frka-Petešić

Portrait of bf284

My research is focused on self-assembly control of Cellulose nanocrystals (CNCs) in thin films for photonic application. CNCs present an exponentially growing interest in the soft matter and industrial community. This non-toxic, cheap, biosourced and widely available resource consists of thin elongated nanorods that present a low density and a high modulus, which makes them interesting as reinforcement fillers. Moreover, in suspension they form colloidal liquid crystals, and self-organize in cholesteric phase. When integrated in a thin solid film whilst self-assembling in this ordered way, they provided to the resulting nanostructured composite important optical and mechanical properties: they present a photonic band-gap for circularly polarised light, and prevent catastrophic fracture propagation in solids, as observed in Nature with similar cholesteric architectures. My current project is focused on controlling the self-assembly of cellulose nanocrystal in 2D films while maintaining a long-range uniformity of their orientation for optimal optical properties, and integrating other biocompatible materials like proteins for multiple application: edible nontoxic coloured pigments (industrial collaboration), and photonic metamaterial elements (lowpriced, anti-counterfeiting applications).

Fig.1: polarised optical microscopy images of iridescent film of cellulose nanocrystals self-assembled into a cholesteric left-handed structure (400µm x 300µm).
The sample reflects the Left Circular Polarised (LCP) component of the light (left image) but transmits the Right Circular Polarised component (right image). 

Publications

Dynamically Controlled Iridescence of Cholesteric Cellulose Nanocrystal Suspensions Using Electric Fields
B Frka-Petesic, H Radavidson, B Jean, L Heux
– Adv Mater
(2017)
29,
1606208
Shape Memory Cellulose-Based Photonic Reflectors
A Espinha, G Guidetti, MC Serrano, B Frka-Petesic, AG Dumanli, WY Hamad, Á Blanco, C López, S Vignolini
– ACS Appl Mater Interfaces
(2016)
8,
31935
Hierarchical Self-Assembly of Cellulose Nanocrystals in a Confined Geometry.
RM Parker, B Frka-Petesic, G Guidetti, G Kamita, G Consani, C Abell, S Vignolini
– ACS Nano
(2016)
10,
8443
Biocompatible and Sustainable Optical Strain Sensors for Large-Area Applications
G Kamita, B Frka-Petesic, A Allard, M Dargaud, K King, AG Dumanli, S Vignolini
– Advanced Optical Materials
(2016)
4,
1950
Aggregation of Antibody Drug Conjugates at Room Temperature: SAXS and Light Scattering Evidence for Colloidal Instability of a Specific Subpopulation
B Frka-Petesic, D Zanchi, N Martin, S Carayon, S Huille, C Tribet
– LANGMUIR
(2016)
32,
4848
Aggregation of Antibody Drug Conjugates at Room Temperature: SAXS and Light Scattering Evidence for Colloidal Instability of a Specific Subpopulation.
B Frka-Petesic, D Zanchi, N Martin, S Carayon, S Huille, C Tribet
– Langmuir
(2016)
32,
4848
Negative Diamagnetic Anisotropy and Birefringence of Cellulose Nanocrystals
B Frka-Petesic, J Sugiyama, S Kimura, H Chanzy, G Maret
– Macromolecules
(2015)
48,
8844
First experimental evidence of a giant permanent electric-dipole moment in cellulose nanocrystals
B Frka-Petesic, B Jean, L Heux
– EPL (Europhysics Letters)
(2014)
107,
28006
Structural probing of clusters and gels of self-aggregated magnetic nanoparticles
B Frka-Petesic, E Dubois, L Almasy, V Dupuis, F Cousin, R Perzynski
– Magnetohydrodynamics
(2013)
49,
328
Dynamics of paramagnetic nanostructured rods under rotating field
B Frka-Petesic, K Erglis, JF Berret, A Cebers, V Dupuis, J Fresnais, O Sandre, R Perzynski
– Journal of Magnetism and Magnetic Materials
(2011)
323,
1309
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Telephone number

01223 763153
34372 (shared)

Email address

bf284@cam.ac.uk

College

Clare Hall