33. Seminarium Centrum Materiałów Przyszłości 23 lipca 2025 r. o godz. 13:15 | Politechnika Gdańska

Serdecznie zapraszamy na 33. seminarium Centrum Materiałów Przyszłości, które odbędzie się już 23 lipca 2025 r. (środa) o godzinie 13:15 w sali EA Audytorium 1 (budynek 41, ETI A).

Luciano de Sio z Sapienza University of Rome (Włochy) przedstawi wykład pt. "Manipulating Light with Random Metamaterials", Francesca Petronella z Institute of Crystallography, National Research Council (CNR-IC) (Włochy) wykład pt. "Gold nanorods arrays for optical biosensing" oraz Dharmendra Pratap SINGH z Université du Littoral Côte d'Opale (ULCO) (Francja) wykład pt. "Charge Transport in Columnar Materials and Their Optoelectronic Applications".

Po seminarium tradycyjnie zapraszamy na pizzę!

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Abstrakty wystąpień:

1. "Manipulating Light with Random Metamaterials"

Effectively controlling and utilizing light presents new opportunities across various research fields, including photonics and biotechnology. In recent years, plasmonic architectures developed through bottom-up approaches have gained significant attention for their ability to improve the limitations imposed by more complex top-down methods. However, challenges persist, as designing innovative plasmonic devices using novel techniques remains highly demanding.

In the past few years, we have developed a water-based method that uses a layer-by-layer electrostatic immersion process, enabling the random deposition of plasmonic nanoparticles onto rigid substrates. This approach allows us to replicate the optical properties of plasmonic colloidal solutions in a dry state, opening new avenues for fabricating exotic metamaterials.

With this premise, I will present our efforts to create innovative bottom-up metamaterials composed of randomly oriented plasmonic nanomaterials. This presentation will explore a range of unconventional applications in modern photonics, from liquid crystal light filtering to green photonics, and will highlight the potential of next-generation light-controllable devices.

2. "Gold nanorods arrays for optical biosensing"

Point-of-use and point-of-care biosensing devices are valuable tools for monitoring, preventing and contrasting the growing spread of infectious diseases linked to current lifestyles.

In this framework, nanomaterials-based biosensors can hold great promise in developing fast, reliable, and user-friendly diagnostic tools, especially concerning optical biosensors, which provide a rapid and intuitive analytical response.

Metallic nanoparticles (M-NPs), due to the localized surface plasmon resonance phenomenon (LSPR), are appealing building blocks for realizing efficient optical biosensors. Indeed, the LSPR that makes the M-NPs optical response dependent not only on their size and shape but also on the surrounding medium experienced by M-NPs.

This presentation intends to overview our recent results on the realization of plasmonic nanostructures with excellent optical and morphological features suitable for fabricating optical biosensors with a focus on gold nanorods (AuNRs).

A particular emphasis will be placed on bio-activation techniques necessary to ensure specificity and selectivity for the resulting optical biosensor. The specific interaction between the target analyte and the biorecognition molecule on the AuNR surface is transduced in a defined optical response; namely, the shift of the longitudinal plasmon band selected an optimal readout parameter for the intrinsic sensitivity to refractive index changes.

The proposed devices are versatile, allow the multiplexing pathogen detection and can also be engineered as multi readout devices.

3. "Charge Transport in Columnar Materials and Their Optoelectronic Applications"

Recently, columnar mesogens have been emerged as Hole transport materials (HTMs) rendering a significant impact on the effectiveness of organic electronic devices. The columnar mesogens exhibit hexagonal (Colh) or rectangular (Colr) columnar phases offering an impressive 1D hole mobility in the order of 0.1 to 10-4 cm2V-1s-1 which is found to be dexterous than most existing polymeric hole transport materials. The charge transport mechanism is these mesogens is mainly governed by the hopping process in which electrons and/or holes migrate unidirectionally from one π-conjugated core to another. This presentation describes the role of liquid crystalline columnar materials as HTL and their impact of the performance of optoelectronic devices.