Naslov
PH-Induced transformation of ligated Au25 to brighter Au23 nanoclusters

Autori
Waszkielewicz, Magdalena ; Olesiak-Banska, Joanna ; Zerbino, Clothilde ; Bertorelle, Franck ; Dagany, Xavier ; Bansal, Ashu K. ; Tariq Sajjad, Muhammad ; Samuel, Ifor D. W. ; Sanader, Zeljka ; Rozycka, Miroslawa ; Wojtas, Magdalena ; Matczyszyn, Katarzyna ; Bonačić- Koutecký, Vlasta ; Antoine, Rodolphe ; Ożyhar, Andrzej ; Samoc, Marek

Izvornik
Nanoscale (2040-3364) 10 (2018), 24; 11335-11341

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Thiolate-protected gold nanoclusters ; Au23Capt17 ; luminescence ; DFT calculations

Sažetak
Thiolate-protected gold nanoclusters have recently attracted considerable attention due to their size-dependent luminescence characterized by a long lifetime and large Stokes shift. However, the optimization of nanocluster properties such as the luminescence quantum yield is still a challenge. We report here transformation of Au25Capt18 (Capt labels captopril) nanoclusters occurring at low pH and yielding a product with much increased luminescence quantum yield which we have identified as Au23Capt17. We applied a simple method of treatment with HCl to accomplish this transformation and we characterized the absorption and emission of the newly-created nanoclusters as well as their morphology. Based on DFT calculations we show which Au nanocluster size transformations can lead to the highly luminescent species such as Au23Capt17.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA