Surface Enhanced Raman Scattering in Graphene Quantum Dots Grown via Electrochemical Process
Graphene Quantum dots (GQDs) are used as a surface-enhanced Raman substrate for detecting target molecules with large specific surface areas and more accessible edges to enhance the signal of target molecules. The electrochemical process is used to synthesize GQDs in the solution-based process from...
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MDPI AG
2021-09-01
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| Series: | Molecules |
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| author | Rangsan Panyathip Sukrit Sucharitakul Surachet Phaduangdhitidhada Athipong Ngamjarurojana Pisist Kumnorkaew Supab Choopun |
| author_facet | Rangsan Panyathip Sukrit Sucharitakul Surachet Phaduangdhitidhada Athipong Ngamjarurojana Pisist Kumnorkaew Supab Choopun |
| author_sort | Rangsan Panyathip |
| collection | DOAJ |
| description | Graphene Quantum dots (GQDs) are used as a surface-enhanced Raman substrate for detecting target molecules with large specific surface areas and more accessible edges to enhance the signal of target molecules. The electrochemical process is used to synthesize GQDs in the solution-based process from which the SERS signals were obtained from GQDs Raman spectra. In this work, GQDs were grown via the electrochemical process with citric acid and potassium chloride (KCl) electrolyte solution to obtain GQDs in a colloidal solution-based format. Then, GQDs were characterized by transmission electron microscope (TEM), Fourier-transform infrared spectroscopy (FTIR), and Raman spectroscopy, respectively. From the results, SERS signals had observed via GQDs spectra through the Raman spectra at D (1326 cm<sup>−1</sup>) and G (1584 cm<sup>−1</sup>), in which D intensity is defined as the presence of defects on GQDs and G is the sp<sup>2</sup> orbital of carbon signal. The increasing concentration of KCl in the electrolyte solution for 0.15M to 0.60M demonstrated the increment of Raman intensity at the D peak of GQDs up to 100 over the D peak of graphite. This result reveals the potential feasibility of GQDs as SERS applications compared to graphite signals. |
| first_indexed | 2024-03-10T07:24:38Z |
| format | Article |
| id | doaj.art-e3501e54b8e649cb9d08294fbd1daace |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T07:24:38Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-e3501e54b8e649cb9d08294fbd1daace2023-11-22T14:23:47ZengMDPI AGMolecules1420-30492021-09-012618548410.3390/molecules26185484Surface Enhanced Raman Scattering in Graphene Quantum Dots Grown via Electrochemical ProcessRangsan Panyathip0Sukrit Sucharitakul1Surachet Phaduangdhitidhada2Athipong Ngamjarurojana3Pisist Kumnorkaew4Supab Choopun5Center of Excellence in Physics and Astronomy, Department of Physics and Materials Science, Faculty of Science, Graduate School, Chiang Mai University, Chiang Mai 50200, ThailandCenter of Excellence in Physics and Astronomy, Department of Physics and Materials Science, Faculty of Science, Graduate School, Chiang Mai University, Chiang Mai 50200, ThailandCenter of Excellence in Physics and Astronomy, Department of Physics and Materials Science, Faculty of Science, Graduate School, Chiang Mai University, Chiang Mai 50200, ThailandCenter of Excellence in Physics and Astronomy, Department of Physics and Materials Science, Faculty of Science, Graduate School, Chiang Mai University, Chiang Mai 50200, ThailandNational Nanotechnology Center (NANOTEC), National Science and Technology Development Agency, Pathumthani 12120, ThailandCenter of Excellence in Physics and Astronomy, Department of Physics and Materials Science, Faculty of Science, Graduate School, Chiang Mai University, Chiang Mai 50200, ThailandGraphene Quantum dots (GQDs) are used as a surface-enhanced Raman substrate for detecting target molecules with large specific surface areas and more accessible edges to enhance the signal of target molecules. The electrochemical process is used to synthesize GQDs in the solution-based process from which the SERS signals were obtained from GQDs Raman spectra. In this work, GQDs were grown via the electrochemical process with citric acid and potassium chloride (KCl) electrolyte solution to obtain GQDs in a colloidal solution-based format. Then, GQDs were characterized by transmission electron microscope (TEM), Fourier-transform infrared spectroscopy (FTIR), and Raman spectroscopy, respectively. From the results, SERS signals had observed via GQDs spectra through the Raman spectra at D (1326 cm<sup>−1</sup>) and G (1584 cm<sup>−1</sup>), in which D intensity is defined as the presence of defects on GQDs and G is the sp<sup>2</sup> orbital of carbon signal. The increasing concentration of KCl in the electrolyte solution for 0.15M to 0.60M demonstrated the increment of Raman intensity at the D peak of GQDs up to 100 over the D peak of graphite. This result reveals the potential feasibility of GQDs as SERS applications compared to graphite signals.https://www.mdpi.com/1420-3049/26/18/5484graphenequantum dotssurface enhanced Ramanelectrochemical processelectrolyte |
| spellingShingle | Rangsan Panyathip Sukrit Sucharitakul Surachet Phaduangdhitidhada Athipong Ngamjarurojana Pisist Kumnorkaew Supab Choopun Surface Enhanced Raman Scattering in Graphene Quantum Dots Grown via Electrochemical Process Molecules graphene quantum dots surface enhanced Raman electrochemical process electrolyte |
| title | Surface Enhanced Raman Scattering in Graphene Quantum Dots Grown via Electrochemical Process |
| title_full | Surface Enhanced Raman Scattering in Graphene Quantum Dots Grown via Electrochemical Process |
| title_fullStr | Surface Enhanced Raman Scattering in Graphene Quantum Dots Grown via Electrochemical Process |
| title_full_unstemmed | Surface Enhanced Raman Scattering in Graphene Quantum Dots Grown via Electrochemical Process |
| title_short | Surface Enhanced Raman Scattering in Graphene Quantum Dots Grown via Electrochemical Process |
| title_sort | surface enhanced raman scattering in graphene quantum dots grown via electrochemical process |
| topic | graphene quantum dots surface enhanced Raman electrochemical process electrolyte |
| url | https://www.mdpi.com/1420-3049/26/18/5484 |
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