Structural and Optical Sensing Properties of Nonthermal Atmospheric Plasma-Synthesized Polyethylene Glycol-Functionalized Gold Nanoparticles
Open Access
- 25 June 2021
- journal article
- research article
- Published by MDPI AG in Nanomaterials
- Vol. 11 (7), 1678
- https://doi.org/10.3390/nano11071678
Abstract
Polyethylene glycol-functionalized gold nanoparticles (Au@PEG NPs) were prepared by a simple plasma-assisted method without additional reducing chemicals. After irradiating tetrachloroauric acid (HAuCl4) and polyethylene glycol (PEG) in aqueous medium with an argon plasma jet, the gold precursor transformed into an Au@PEG NP colloid that exhibited surface plasma resonance at 530 nm. When the plasma jet entered the water, additional reactive species were induced through interactions between plasma-generated reactive species and aqueous media. Interaction of the gold precursor with the plasma-activated medium allowed the synthesis of gold nanoparticles (AuNPs) without reductants. The plasma-synthesized Au@PEG NPs had a quasi-spherical shape with an average particle diameter of 32.5 nm. The addition of PEG not only helped to stabilize the AuNPs but also increased the number of AuNPs. Au@PEG NP-loaded paper (AuNP-paper) was able to detect the degradation of rhodamine B, therefore, indicating that AuNP-paper can act as a surface-enhanced Raman scattering platform. Dye degradation by plasma treatment was investigated by optical absorption and Raman spectroscopy. The method proposed for the fabrication of Au@PEG NPs is rapid, low-cost, and environment-friendly and will facilitate the application of plasma-synthesized nanomaterials in sensors.Funding Information
- National Research Foundation of Korea (NRF-2018R1D1A1B07040386, NRF-2016K1A4A3914113)
This publication has 47 references indexed in Scilit:
- Degradation of azo dye using non-thermal plasma advanced oxidation process in a circulatory airtight reactor systemChemical Engineering Journal, 2012
- Facile and green synthesis of well-dispersed Au nanoparticles in PAN nanofibers by tea polyphenolsJournal of Materials Chemistry, 2012
- Nanoparticle PEGylation for imaging and therapyNanomedicine, 2011
- Synthesis of nanoparticles: sunlight formation of gold nanodecahedra for ultra-sensitive lead-ion detectionGreen Chemistry, 2011
- Green Chemistry: Principles and PracticeChemical Society Reviews, 2009
- Gold Nanoparticle Based Label-Free SERS Probe for Ultrasensitive and Selective Detection of TrinitrotolueneJournal of the American Chemical Society, 2009
- Poly(ethylene glycol)-stabilized silver nanoparticles for bioanalytical applications of SERS spectroscopyThe Analyst, 2009
- Hydrogen peroxide: a metabolic by-product or a common mediator of ageing signals?Nature Reviews Molecular Cell Biology, 2007
- Growing Metal Nanoparticles by EnzymesAdvanced Materials, 2006
- Absolute UV and VUV emission in the 110–400 nm region from 13.56 MHz driven hollow slot microplasmas operating in open airPlasma Sources Science and Technology, 2004