Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/149244
Title: Additive-free electrophoretic deposition of graphene quantum dots thin films
Authors: Nguyen, Tam D.
Geuli, Ori
Yeo, Loo Pin
Magdassi, Shlomo
Mandler, Daniel
Tok, Alfred Iing Yoong
Keywords: Engineering::Materials
Issue Date: 2019
Source: Nguyen, T. D., Geuli, O., Yeo, L. P., Magdassi, S., Mandler, D. & Tok, A. I. Y. (2019). Additive-free electrophoretic deposition of graphene quantum dots thin films. Chemistry - A European Journal, 25(72), 16573-16581. https://dx.doi.org/10.1002/chem.201903596
Journal: Chemistry - A European Journal
Abstract: The electrophoretic deposition (EPD) of graphene-based materials on transparent substrates is highly potential for many applications. Several factors can determine the yield of the EPD process, such as applied voltage, deposition time and particularly the presence of dispersion additives (stabilisers) in the suspension solution. This study presents an additive-free EPD of graphene quantum dot (GQD) thin films on an indium tin oxide (ITO) glass substrate and studies the deposition mechanism with the variation of the applied voltage (10–50 V) and deposition time (5–25 min). It is found that due to the small size (≈3.9 nm) and high content of deprotonated carboxylic groups, the GQDs form a stable dispersion (zeta-potential of about −35 mV) without using additives. The GQD thin films can be deposited onto ITO with optimal surface morphology at 30 V in 5 min (surface roughness of approximately (3.1±1.3) nm). In addition, as-fabricated GQD thin films also possess some interesting physico-optical properties, such as a double-peak photoluminescence at about λ=417 and 439 nm, with approximately 98 % visible transmittance. This low-cost and eco-friendly GQD thin film is a promising material for various applications, for example, transparent conductors, supercapacitors and heat conductive films in smart windows.
URI: https://hdl.handle.net/10356/149244
ISSN: 1521-3765
DOI: 10.1002/chem.201903596
Rights: This is the peer reviewed version of the following article: Nguyen, T. D., Geuli, O., Yeo, L. P., Magdassi, S., Mandler, D. & Tok, A. I. Y. (2019). Additive-free electrophoretic deposition of graphene quantum dots thin films. Chemistry - A European Journal, 25(72), 16573-16581. https://dx.doi.org/10.1002/chem.201903596, which has been published in final form at https://doi.org/10.1002/chem.201903596. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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