Synthesis and spectroscopic characterization of gold nanoparticles via plasma-liquid interaction technique
Fabrication of non-functionalized gold nanoparticles is interesting owing to their potential applications in sensing and biomedicine. We report on the synthesis of surfactant-free gold nanoparticles (AuNPs) by Plasma-Liquid Interaction (PLI) technique, using micro-atmospheric pressure D.C. plasma. T...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2018-01-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5004470 |
| _version_ | 1811233607579074560 |
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| author | N. Khatoon H. M. Yasin M. Younus W. Ahmed N. U. Rehman M. Zakaullah M. Zafar Iqbal |
| author_facet | N. Khatoon H. M. Yasin M. Younus W. Ahmed N. U. Rehman M. Zakaullah M. Zafar Iqbal |
| author_sort | N. Khatoon |
| collection | DOAJ |
| description | Fabrication of non-functionalized gold nanoparticles is interesting owing to their potential applications in sensing and biomedicine. We report on the synthesis of surfactant-free gold nanoparticles (AuNPs) by Plasma-Liquid Interaction (PLI) technique, using micro-atmospheric pressure D.C. plasma. The effects of discharge parameters, such as discharge current, precursor concentration and gas flow rates on the structure and morphology of AuNPs have been investigated. Optical Emission Spectroscopy (OES) was employed to estimate the UV radiation intensity and OH radical density. Scanning electron microscopy (SEM) and ultraviolet-visible (UV-Vis) optical spectroscopy were employed to study the morphology and structure of AuNPs. The normalized intensities of UV radiation and OH radical density found to increase with increase in discharge current. We observed that the particle size can be tuned by controlling any of the following parameters: intensity of the UV radiation, OH radical density, and concentration of the Au precursor. Interestingly, we found that addition of 1% Ar in the feedstock gas results in formation of relatively uniform size distribution of nanoparticles. The surfactant-free AuNPs, due to their bare-surface, exhibit excellent surface-enhanced Raman scattering (SERS) properties. The SERS study of Rhodamine 6G using AuNPs as substrates, shows significant Raman enhancement and fluorescence quenching, which makes our technique a potentially powerful route to detection of trace amounts of dangerous explosives and other materials. |
| first_indexed | 2024-04-12T11:22:38Z |
| format | Article |
| id | doaj.art-dee121225ee34193abfdf405b34f5043 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-12T11:22:38Z |
| publishDate | 2018-01-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-dee121225ee34193abfdf405b34f50432022-12-22T03:35:18ZengAIP Publishing LLCAIP Advances2158-32262018-01-0181015130015130-1010.1063/1.5004470057801ADVSynthesis and spectroscopic characterization of gold nanoparticles via plasma-liquid interaction techniqueN. Khatoon0H. M. Yasin1M. Younus2W. Ahmed3N. U. Rehman4M. Zakaullah5M. Zafar Iqbal6Plasma Physics Laboratory, Department of Physics, COMSATS Institute of Information Technology, Islamabad 45550, PakistanPlasma Physics Laboratory, Department of Physics, COMSATS Institute of Information Technology, Islamabad 45550, PakistanPlasma Physics Laboratory, Department of Physics, Quaid-i-Azam University, Islamabad 45320, PakistanPlasma Physics Laboratory, Department of Physics, COMSATS Institute of Information Technology, Islamabad 45550, PakistanPlasma Physics Laboratory, Department of Physics, COMSATS Institute of Information Technology, Islamabad 45550, PakistanRafi M. Chaudhri Chair, Center for Advanced Studies in Physics, Government College University, Church Road, Lahore 54000, PakistanPlasma Physics Laboratory, Department of Physics, COMSATS Institute of Information Technology, Islamabad 45550, PakistanFabrication of non-functionalized gold nanoparticles is interesting owing to their potential applications in sensing and biomedicine. We report on the synthesis of surfactant-free gold nanoparticles (AuNPs) by Plasma-Liquid Interaction (PLI) technique, using micro-atmospheric pressure D.C. plasma. The effects of discharge parameters, such as discharge current, precursor concentration and gas flow rates on the structure and morphology of AuNPs have been investigated. Optical Emission Spectroscopy (OES) was employed to estimate the UV radiation intensity and OH radical density. Scanning electron microscopy (SEM) and ultraviolet-visible (UV-Vis) optical spectroscopy were employed to study the morphology and structure of AuNPs. The normalized intensities of UV radiation and OH radical density found to increase with increase in discharge current. We observed that the particle size can be tuned by controlling any of the following parameters: intensity of the UV radiation, OH radical density, and concentration of the Au precursor. Interestingly, we found that addition of 1% Ar in the feedstock gas results in formation of relatively uniform size distribution of nanoparticles. The surfactant-free AuNPs, due to their bare-surface, exhibit excellent surface-enhanced Raman scattering (SERS) properties. The SERS study of Rhodamine 6G using AuNPs as substrates, shows significant Raman enhancement and fluorescence quenching, which makes our technique a potentially powerful route to detection of trace amounts of dangerous explosives and other materials.http://dx.doi.org/10.1063/1.5004470 |
| spellingShingle | N. Khatoon H. M. Yasin M. Younus W. Ahmed N. U. Rehman M. Zakaullah M. Zafar Iqbal Synthesis and spectroscopic characterization of gold nanoparticles via plasma-liquid interaction technique AIP Advances |
| title | Synthesis and spectroscopic characterization of gold nanoparticles via plasma-liquid interaction technique |
| title_full | Synthesis and spectroscopic characterization of gold nanoparticles via plasma-liquid interaction technique |
| title_fullStr | Synthesis and spectroscopic characterization of gold nanoparticles via plasma-liquid interaction technique |
| title_full_unstemmed | Synthesis and spectroscopic characterization of gold nanoparticles via plasma-liquid interaction technique |
| title_short | Synthesis and spectroscopic characterization of gold nanoparticles via plasma-liquid interaction technique |
| title_sort | synthesis and spectroscopic characterization of gold nanoparticles via plasma liquid interaction technique |
| url | http://dx.doi.org/10.1063/1.5004470 |
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