Influence of Solvents and Adsorption of Organic Molecules on the Properties of CVD Synthesized 2D MoS2

Brkić, Antun Lovro; Supina, Antonio; Čapeta, Davor; Dončević, Lucija; Ptiček, Lucija; Mandić, Šimun; Racané, Livio; Delač Marion, Ida (2023) Influence of Solvents and Adsorption of Organic Molecules on the Properties of CVD Synthesized 2D MoS2. Nanomaterials, 13 (14). ISSN 2079-4991

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Abstract

We present a simple method for modification of 2D materials by drop-casting of the organic molecule in solution on the 2D material under ambient conditions. Specifically, we investigated the adsorption of 6-(4,5-Dihydro-1H-imidazol-3-ium-2-yl)-2-(naphthalene-2-yl)benzothiazole methanesulfonate (L63MS) organic molecule on 2D MoS2 . To better understand the effect of the organic molecule on the 2D material, we also investigated the impact of solvents alone on the materials’ properties. The MoS2 samples were synthesized using ambient pressure chemical vapor deposition. Atomic force microscopy, Raman spectroscopy, photoluminescence spectroscopy and optical microscopy were used to characterize the samples. The measurements were performed after synthesis, after the drop-casting of solvents and after the drop-casting of organic molecule solutions. Our results indicate that the used organic molecule effectively adsorbs on and prompts discernible changes in the (opto)electronic properties of the 2D material. These changes encompass variations in the Raman spectra shape, alterations in the photoluminescence (PL) signal characteristics and modifications in excitonic properties. Such alterations can be linked to various phenomena including doping, bandgap modifications, introduction or healing of defects and that the solvent plays a crucial role in the process. Our study provides insights into the modification of 2D materials under ambient conditions and highlights the importance of solvent selection in the process.

Item Type:	Article
Uncontrolled Keywords:	2D materials; MoS2; organic molecules; drop-casting
Subjects:	NATURAL SCIENCES > Physics > Condensed Matter Physics
Divisions:	Division of Molecular Medicine
Projects:	Project title Project leader Project code Project type Funkcionalizirani dvodimenzionalni materijali-Fun2DMat Ida Delač Marion UIP-2020-02-8891 HRZZ Potpora vrhunskim istraživanjima Centra izvrsnosti za napredne materijale i senzore- Mile Ivanda; Milko Jakšić; Mario Stipčević; Marko Kralj KK.01.1.1.01.0001 EK
Depositing User:	Lorena Palameta
Date Deposited:	25 Nov 2024 12:03
URI:	http://fulir.irb.hr/id/eprint/9328
DOI:	10.3390/nano13142115

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