Magnetite-Supported Gold Nanostars for the Uptake and SERS Detection of Tetracycline
Magnetite nanoparticles (MNPs) decorated with gold nanostars (AuNSs) have been prepared by using a seed growth method without the addition of surfactants or colloidal stabilizers. The hybrid nanomaterials were investigated as adsorbents for the uptake of tetracycline (TC) from aqueous solutions and...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-12-01
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| Series: | Nanomaterials |
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| Online Access: | http://www.mdpi.com/2079-4991/9/1/31 |
| _version_ | 1819065426150162432 |
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| author | Paula C. Pinheiro Sara Fateixa Helena I. S. Nogueira Tito Trindade |
| author_facet | Paula C. Pinheiro Sara Fateixa Helena I. S. Nogueira Tito Trindade |
| author_sort | Paula C. Pinheiro |
| collection | DOAJ |
| description | Magnetite nanoparticles (MNPs) decorated with gold nanostars (AuNSs) have been prepared by using a seed growth method without the addition of surfactants or colloidal stabilizers. The hybrid nanomaterials were investigated as adsorbents for the uptake of tetracycline (TC) from aqueous solutions and subsequent detection using surface-enhanced Raman scattering (SERS). Several parameters were investigated in order to optimize the performance of these hybrid platforms on the uptake and SERS detection of TC, including variable pH values and the effect of contact time on the removal of TC. The spatial distribution of TC and AuNS on the hybrid composites was accomplished by coupling SERS analysis with Raman imaging studies, allowing also for the determination of the detection limit for TC when dissolved in ultrapure water (10 nM) and in more complex aqueous matrices (1 μM). Attempts were also made to investigate the adsorption modes of the TC molecules at the surface of the metal NPs by taking into account the enhancement of the Raman bands in these different matrices. |
| first_indexed | 2024-12-21T15:46:14Z |
| format | Article |
| id | doaj.art-16b7b16871104d8e8f8a828a835f8f44 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-21T15:46:14Z |
| publishDate | 2018-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-16b7b16871104d8e8f8a828a835f8f442022-12-21T18:58:21ZengMDPI AGNanomaterials2079-49912018-12-01913110.3390/nano9010031nano9010031Magnetite-Supported Gold Nanostars for the Uptake and SERS Detection of TetracyclinePaula C. Pinheiro0Sara Fateixa1Helena I. S. Nogueira2Tito Trindade3Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, PortugalDepartment of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, PortugalDepartment of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, PortugalDepartment of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, PortugalMagnetite nanoparticles (MNPs) decorated with gold nanostars (AuNSs) have been prepared by using a seed growth method without the addition of surfactants or colloidal stabilizers. The hybrid nanomaterials were investigated as adsorbents for the uptake of tetracycline (TC) from aqueous solutions and subsequent detection using surface-enhanced Raman scattering (SERS). Several parameters were investigated in order to optimize the performance of these hybrid platforms on the uptake and SERS detection of TC, including variable pH values and the effect of contact time on the removal of TC. The spatial distribution of TC and AuNS on the hybrid composites was accomplished by coupling SERS analysis with Raman imaging studies, allowing also for the determination of the detection limit for TC when dissolved in ultrapure water (10 nM) and in more complex aqueous matrices (1 μM). Attempts were also made to investigate the adsorption modes of the TC molecules at the surface of the metal NPs by taking into account the enhancement of the Raman bands in these different matrices.http://www.mdpi.com/2079-4991/9/1/31Au nanostarsmagnetite nanoparticleswater pollutantsSERSantibiotics |
| spellingShingle | Paula C. Pinheiro Sara Fateixa Helena I. S. Nogueira Tito Trindade Magnetite-Supported Gold Nanostars for the Uptake and SERS Detection of Tetracycline Nanomaterials Au nanostars magnetite nanoparticles water pollutants SERS antibiotics |
| title | Magnetite-Supported Gold Nanostars for the Uptake and SERS Detection of Tetracycline |
| title_full | Magnetite-Supported Gold Nanostars for the Uptake and SERS Detection of Tetracycline |
| title_fullStr | Magnetite-Supported Gold Nanostars for the Uptake and SERS Detection of Tetracycline |
| title_full_unstemmed | Magnetite-Supported Gold Nanostars for the Uptake and SERS Detection of Tetracycline |
| title_short | Magnetite-Supported Gold Nanostars for the Uptake and SERS Detection of Tetracycline |
| title_sort | magnetite supported gold nanostars for the uptake and sers detection of tetracycline |
| topic | Au nanostars magnetite nanoparticles water pollutants SERS antibiotics |
| url | http://www.mdpi.com/2079-4991/9/1/31 |
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