skip to content
 

Dr Bruno Frka-Petesic

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

The Self-Assembly of Cellulose Nanocrystals: Hierarchical Design of Visual Appearance.
RM Parker, G Guidetti, CA Williams, T Zhao, A Narkevicius, S Vignolini, B Frka-Petesic
– Adv Mater
(2017)
Controlling the Photonic Properties of Cholesteric Cellulose Nanocrystal Films with Magnets
B Frka-Petesic, G Guidetti, G Kamita, S Vignolini
– Adv Mater
(2017)
29,
1701469
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 : the ACS journal of surfaces and colloids
(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
Orientation of cellulose nanocrystals dispersion in apolar solvent: Experimental determination of permanent and induced electric dipolar moment and suspension properties
B Frka-Petesic, B Jean, L Heux
– ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2014)
247,
  •  
  • 1 of 3
  • >

Telephone number

01223 334372 (shared)
01223 763153

Email address

bf284@cam.ac.uk

College

Clare Hall