Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Interfacing transition metal dichalcogenides with carbon nanodots for managing photoinduced energy and charge-transfer processes
Δημιουργός/Συγγραφέας:	Vallan, Lorenzo Canton-Vitoria, Ruben Gobeze, Habtom B. Jang, Youngwoo Arenal, Raul Benito, Ana M. Maser, Wolfgang K. D’Souza, Francis [EL] Ταγματάρχης, Νίκος[EN] Tagmatarchis, Nikos
Εκδότης:	American Chemical Society
Ημερομηνία:	2018
Γλώσσα:	Αγγλικά
ISSN:	0002-7863 1520-5126
DOI:	10.1021/jacs.8b09204
Περίληψη:	Exfoliated semiconducting MoS2 and WS2 were covalently functionalized with 1,2-dithiolane-modified carbon nanodots (CNDs). The newly synthesized CND-MoS2 and CND-WS2 hybrids were characterized by spectroscopic, thermal, and electron microscopy imaging methods. Based on electronic absorption and fluorescence emission spectroscopy, modulation of the optoelectronic properties of TMDs by interfacing with CNDs was accomplished. Electrochemical studies revealed facile oxidation of MoS2 over WS2 in the examined hybrids, suggesting it to be better electron donor. Excited state events, investigated by femtosecond transient absorption spectroscopic studies, revealed ultrafast energy transfer from photoexcited CNDs to both MoS2 and WS2. Interestingly, upon MoS2 photoexcitation, charge transfer from an exciton dissociation path of MoS2 to CNDs, within CND-MoS2, was observed. However, such a process in CND-WS2 was found to be absent due to energetic reasons. The present study highlights the importance of TMD-derived donor–acceptor hybrids in light energy harvesting and optoelectronic applications. Furthermore, the fundamental information obtained from the current results will benefit design strategies and impact the development of additional TMD-based hybrid materials to efficiently manage and perform in electron-transfer processes.
Τίτλος πηγής δημοσίευσης:	Journal of the American Chemical Society
Τόμος/Κεφάλαιο:	140
Τεύχος:	41
Σελίδες:	13488-13496
Θεματική Κατηγορία:	[EL] Χημεία (Γενικά)[EN] Chemistry (General)
Λέξεις-Κλειδιά:	Transition metal dichalcogenides Functionalization Carbon nanodots Donor-acceptor Electron transfer
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	Copyright © American Chemical Society
Όροι και προϋποθέσεις δικαιωμάτων:	This is the author’s manuscript and appears in: “J. Am. Chem. Soc. 2018, 140, 41, 13488–13496, Publication Date:September 17, 2018”. The definite version can be found at: https://doi.org/10.1021/jacs.8b09204
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://pubs.acs.org/doi/10.1021/jacs.8b09204
Ηλεκτρονική διεύθυνση περιοδικού (link) :	https://pubs.acs.org/journal/jacsat
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο