The Effect of Poly (Ethylene Glycol) on the Photoluminescence Properties of Carbon Dots From Cassava Peels Synthesized by Hydrothermal Methods

Abstract

Carbon dots (C-dots) have been successfully synthesized from cassava peels using the hydrothermal method. The C-dots are further passivated using poly (ethylene glycol) (PEG) with a variation of the volume of 0.5 ml, 1.0 ml, and 1.5 ml. The properties of photoluminescence C-dots before and after PEG were characterized using photoluminescence (PL) and time-resolved photoluminescence (TRPL) spectrophotometers. PEG succeeded in influencing PL C-dots properties, such as peak wavelength, PL intensity, and electron time decay. The addition of 0.5 ml of PEG to C-dots is the optimum condition and best with the peak wavelength, the PL intensity and, time decay electron is 507.52 nm, 5302 a.u, and 3.794031133 ns, respectively.

Spectroscopy Study of Polyvinyl Alcohol/Carbon Dots Composite Films

“…The photoluminescence process can be observed in the position of the spectrum, dynamics, and efficiency to obtain relevant information. This spectrum informs about the energy difference between the excited state and the ground state which serves as the first indicator of material application [7,25].…”

“…Putro et al reported that outer cassava peels can be synthesized easily using microwave-assisted [6]. Therefore, inner cassava peels also can be synthesized by hydrothermal methods [7], microwave [8], and simple carbonization in an oven [4]. Some of the featuring properties of C-dots are independent excitation-photoluminescence [9] and electrical conductivity [10], which are potential applications as optoelectronic devices.…”

Synthesis of Fluorescent Carbon Dots (CDs) Using Laser Ablation Method for Bioimaging Application

“…Utilizing a 1064 nm Nd:YAG laser, we pursue the synthesis of CDs, delving into their optical characteristics, morphology, and size (Kaczmarek et al, 2021;Reyes et al, 2016). We meticulously quantify the energy absorption of CDs pre and post laser ablation, and upon integration with PEG400, adopting ImageJ for fluorescence intensity analysis in zebrafish ocular regions (Aji et al, 2017;Putro et al, 2019;Gao et al, 2020). Employing the Corrected Total Cell Fluorescence (CTCF) technique, we assess the fluorescence density across multiple image slices acquired via CLSM (Jakic et al, 2017), thereby enhancing our understanding of CDs' potential in bioimaging.…”