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Issue 13, 2019, Issue in Progress
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Simultaneous ultraviolet and first near-infrared window absorption of luminescent carbon dots/PVA composite film

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Abstract

Liquid Carbon Dots (CDs) were successfully synthesized by hydrothermal method using urea and citric acid as raw materials. TEM images confirmed that the CDs have a spherical shape with a homogeneous distribution. The as-prepared liquid CDs could absorb ultraviolet (UV) and first near infra-red (NIR) window simultaneously. However, the photoluminescence (PL) of the liquid CDs was damaged by their quenching effect. To overcome this issue, the liquid CDs were dispersed in poly(vinyl) alcohol (PVA) to fabricate the composite film. Herein, the dual-peak absorption properties of the CDs/PVA composite films were investigated for the first time. The composite films could maintain the simultaneous UV and first NIR window absorption property even after being preheated up to 200 °C, implying that the structure of CDs was well retained during the transition from the liquid to films. Daylight treatment for seven days produced minimum changes in the UV-vis and PL spectra, which indicates that the CDs/PVA film has more stable optical properties than the liquid CDs.

Graphical abstract: Simultaneous ultraviolet and first near-infrared window absorption of luminescent carbon dots/PVA composite film

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Supplementary files

Article information


Submitted
27 Nov 2018
Accepted
15 Feb 2019
First published
06 Mar 2019

This article is Open Access

RSC Adv., 2019,9, 7375-7381
Article type
Paper

Simultaneous ultraviolet and first near-infrared window absorption of luminescent carbon dots/PVA composite film

M. Taspika, F. A. Permatasari, B. W. Nuryadin, T. R. Mayangsari, A. H. Aimon and F. Iskandar, RSC Adv., 2019, 9, 7375
DOI: 10.1039/C8RA09742A

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