INSTITUTO DE CIENCIA DE MATERIALES DE SEVILLA

(Consejo Superior de Investigaciones Científicas – Universidad de Sevilla)

icms-conferences

next talk:
September 17th (Tuesday) | 10.00 h 
Seminario CicCartuja2 

Growth of nanocolumnar thin films on patterned substrates at oblique angles

Dr.  Alberto Palmero Acebedo

+ info

The influence of one dimensional substrate patterns on the nanocolumnar growth of thin films deposited by magnetron sputtering at oblique angles is theoretically and experimentally studied. A well‐established growth model has been used to study the interplay between the substrate topography and the thin film morphology. A critical thickness has been defined, below which the columnar growth is modulated by the substrate topography, while for thicknesses above, the impact of substrate features is progressively lost in two stages; first columns grown on taller features take over neighboring ones, and later the film morphology evolves independently of substrate features. These results have been experimentally tested by analyzing the nanocolumnar growth of SiO2 thin films on ion‐induced patterned substrates.

ppap201800135-gra-0001

ICMS-sci-talks are held by scientists from the Materials Science Institute of Seville with the aim of discussing and disseminating their research activity. They consist of 20-25 min talks focussed on a recently published paper.
These talks take place about every three weeks at 10.00 am in the seminar room at cicCartuja2 (yellow building).
Contact: se.ci1563622069sc.es1563622069mci@o1563622069rebuy1563622069
next conference:
July 4th (Thursday) | 11.00 h
Salón de Grados CicCartuja2

Colour Engineering: from nature
to applications

Dr. Silvia Vignolini
University of Cambridge

+ info

The most brilliant colours in nature are obtained by structuring transparent materials on the scale of the wavelength of visible light. By controlling/designing the dimensions of such nanostructures, it is possible to achieve extremely intense colourations over the entire visible spectrum without using pigments or colorants. Colour obtained through structure, namely structural colour, is widespread in the animal and plant kingdom [1]. Such natural photonic nanostructures are generally synthesised in ambient conditions using a limited range of biopolymers. Given these limitations, an amazing range of optical structures exists: from very ordered photonic structures [2], to partially disordered [3], to completely random ones [4].
In this seminar, I will introduce some striking example of natural photonic structures [2-4] and review our recent advances to fabricate bio-mimetic photonic structures using the same material as nature. Biomimetic with cellulose-based architectures enables us to fabricate novel photonic structures using low cost materials in ambient conditions [6-7]. Importantly, it also allows us to understand the biological processes at work during the growth of these structures in plants.

[1] Kinoshita, S. et al. (2008). Physics of structural colors. Rep. Prog. Phys. 71(7), 076401.
[2] Vignolini, S. et al. (2012). Pointillist structural color in Pollia fruit. PNAS 109, 15712-15716.
[3] Moyroud, E. et al. (2017). Disorder in convergent floral nanostructures enhances signalling to bees. Nature 550, 469.
[4] Burresi M. et al. (2014) Bright-White Beetle Scales Optimise Multiple Scattering of Light. Sci.Rep. 4, 727
[5] Parker R. et al. (2018) The Self-Assembly of Cellulose Nanocrystals: Hierarchical Design of Visual Appearance. Adv Mat 30, 1704477
[6] Parker R. et al. (2016). Hierarchical Self-Assembly of Cellulose Nanocrystals in a Confined Geometry. ACS Nano, 10 (9), 8443–8449
[7] Liang H-L. et al. (2018). Roll-to-roll fabrication of touch-responsive cellulose photonic laminates, Nat Com 9, 4632

The invited conferences are held by researchers form groups in topics of utmost interest to our Institute. With the conferences, we intend to favour the stablishment of conctacts between the invited researchers and our research groups.
The invited seminars are held montly on Thursday mornings,  in the Seminars room at cic-cartuja 2 (yellow building).
Contact: se.ci1563622069sc.es1563622069mci@o1563622069nazol1563622069g1563622069

Seminario cicCartuja2 / Salón de Grados cicCartuja2

Seminario cicCartuja2 / Salón de Grados cicCartuja2

ICMS-sci-Talks
Seminario CIC-Cartuja 2

ICMS Invited Lectures
Salón de Grados cicCartuja2

Americo Vespucio 49
Isla de la Cartuja Sevilla
41092 España
Teléfono: 954489500

Instituto de Ciencia de Materiales de Sevilla

Centro de Investigaciones Científicas Isla de la Cartuja. C/Américo Vespucio, 49 – 41092 Sevilla (España)
Tel.: (+34) 954489527 | Fax: (+34) 954460165 | se.ci1563622069sc.es1563622069mci@n1563622069ozub1563622069