Wydarzenia

Dnia 2025-10-21 o godzinie 13:15 w Sali 2011 Wydziału Fizyki UwB, dr hab. Wiktor Lewandowski, prof. UW z Laboratory of Organic Nanomaterials, Faculty of Chemistry, University of Warsaw wygłosi wykład pt:

„Morphologically chiral gold nanomaterials”

Serdecznie zapraszamy

Andrzej Maziewski

Jerzy Przeszowski

„Morphologically chiral gold nanomaterials”

dr hab. Wiktor Lewandowski, prof. UW

Morphologically chiral gold nanomaterials Laboratory of Organic Nanomaterials, Faculty of Chemistry, University of Warsaw

Nanomaterials exhibiting chirality have recently emerged as powerful tools for controlling light–matter interactions, with applications in e.g., chiral photonics. Our group developed a method to generate chiral optical responses by organizing achiral metallic nanoparticles into twisted superstructures on soft, helical templates [1-4]. However, in this seminar, I will focus on intrinsically chiral gold nanoparticles, in which the chirality originates from the twisted morphology of the metallic core itself.

We present two of our recent studies: (1) the transfer of aqueous chiral AuNPs into organic media using LC-like thiols, preserving strong CD and enabling integration into soft materials [5]; (2) the enantioselective synthesis of morphologically chiral AuNPs using multidentate cysteine-based inducers, yielding particles with defined handedness, tunable shape, and g-factors up to ~10⁻² [6]. Both studies utilize electron microscopy, tomography, EDS, UV–Vis–NIR, and CD spectroscopy to elucidate the structure and chiroptical behavior.

[1] Advanced Materials 32, 1904581 (2020).

[2] Advanced Functional Materials 32, 2111280 (2022).

[3] ACS Nano 17, 6, 5548-5560 (2023).

[4] Advanced Functional Materials, 2500933 (2025).

[5] ACS Applied Materials & Interfaces 14, 50013 (2022)

[6] Small, 21 (35), 2408004 (2025)