Green Synthesis of Flower-Like Carrageenan-Silver Nanoparticles and Elucidation of Its Physicochemical and Antibacterial Properties
Herein, we report the green synthesis of flower-like carrageenan-silver nanoparticles (c-AgNPs) through a facile hydrothermal reaction at 90 °C for 2 h. The reduction of silver nitrate (AgNO<sub>3</sub>) to c-AgNPs was evident by the colour change of the solution from colourless to dark...
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| Format: | Article |
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MDPI AG
2023-01-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/2/907 |
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| author | Syafiqah Syazwani Jaffar Suryani Saallah Mailin Misson Shafiquzzaman Siddiquee Jumardi Roslan Wuled Lenggoro |
| author_facet | Syafiqah Syazwani Jaffar Suryani Saallah Mailin Misson Shafiquzzaman Siddiquee Jumardi Roslan Wuled Lenggoro |
| author_sort | Syafiqah Syazwani Jaffar |
| collection | DOAJ |
| description | Herein, we report the green synthesis of flower-like carrageenan-silver nanoparticles (c-AgNPs) through a facile hydrothermal reaction at 90 °C for 2 h. The reduction of silver nitrate (AgNO<sub>3</sub>) to c-AgNPs was evident by the colour change of the solution from colourless to dark brown and further confirmed by a UV-Vis surface plasmon resonance (SPR) peak at ~420 nm. The FTIR spectra showed that the abundance of functional groups present in the carrageenan were responsible for the reduction and stabilisation of the c-AgNPs. The XRD pattern confirmed the crystalline nature and face-centred cubic structure of the c-AgNPs, while the EDX analysis showed the presence of a high composition of elemental silver (85.87 wt%). Interestingly, the morphological characterisations by SEM and FE-SEM revealed the formation of flower-like c-AgNPs composed of intercrossed and random lamellar petals of approximately 50 nm in thickness. The growth mechanism of flower-like c-AgNPs were elucidated based on the TEM and AFM analyses. The c-AgNPs displayed promising antibacterial properties against <i>E. coli</i> and <i>S. aureus</i>, with zones of inhibition ranging from 8.0 <i>±</i> 0.0 to 11.7 ± 0.6 mm and 7.3 ± 0.6 to 9.7 ± 0.6 mm, respectively, as the concentration of c-AgNPs increased from 0.1 to 4 mg/mL. |
| first_indexed | 2024-03-09T11:33:58Z |
| format | Article |
| id | doaj.art-e2bbe240e2fc475bb53f23e01f20bd64 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T11:33:58Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-e2bbe240e2fc475bb53f23e01f20bd642023-11-30T23:46:39ZengMDPI AGMolecules1420-30492023-01-0128290710.3390/molecules28020907Green Synthesis of Flower-Like Carrageenan-Silver Nanoparticles and Elucidation of Its Physicochemical and Antibacterial PropertiesSyafiqah Syazwani Jaffar0Suryani Saallah1Mailin Misson2Shafiquzzaman Siddiquee3Jumardi Roslan4Wuled Lenggoro5Biotechnology Research Institute, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu 88400, Sabah, MalaysiaBiotechnology Research Institute, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu 88400, Sabah, MalaysiaBiotechnology Research Institute, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu 88400, Sabah, MalaysiaBiotechnology Research Institute, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu 88400, Sabah, MalaysiaFaculty of Food Science and Nutrition, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu 88400, Sabah, MalaysiaInstitute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Tokyo 184-8588, JapanHerein, we report the green synthesis of flower-like carrageenan-silver nanoparticles (c-AgNPs) through a facile hydrothermal reaction at 90 °C for 2 h. The reduction of silver nitrate (AgNO<sub>3</sub>) to c-AgNPs was evident by the colour change of the solution from colourless to dark brown and further confirmed by a UV-Vis surface plasmon resonance (SPR) peak at ~420 nm. The FTIR spectra showed that the abundance of functional groups present in the carrageenan were responsible for the reduction and stabilisation of the c-AgNPs. The XRD pattern confirmed the crystalline nature and face-centred cubic structure of the c-AgNPs, while the EDX analysis showed the presence of a high composition of elemental silver (85.87 wt%). Interestingly, the morphological characterisations by SEM and FE-SEM revealed the formation of flower-like c-AgNPs composed of intercrossed and random lamellar petals of approximately 50 nm in thickness. The growth mechanism of flower-like c-AgNPs were elucidated based on the TEM and AFM analyses. The c-AgNPs displayed promising antibacterial properties against <i>E. coli</i> and <i>S. aureus</i>, with zones of inhibition ranging from 8.0 <i>±</i> 0.0 to 11.7 ± 0.6 mm and 7.3 ± 0.6 to 9.7 ± 0.6 mm, respectively, as the concentration of c-AgNPs increased from 0.1 to 4 mg/mL.https://www.mdpi.com/1420-3049/28/2/907silver nanoparticlessilver nanoflowergreen synthesiscarrageenanantibacterial |
| spellingShingle | Syafiqah Syazwani Jaffar Suryani Saallah Mailin Misson Shafiquzzaman Siddiquee Jumardi Roslan Wuled Lenggoro Green Synthesis of Flower-Like Carrageenan-Silver Nanoparticles and Elucidation of Its Physicochemical and Antibacterial Properties Molecules silver nanoparticles silver nanoflower green synthesis carrageenan antibacterial |
| title | Green Synthesis of Flower-Like Carrageenan-Silver Nanoparticles and Elucidation of Its Physicochemical and Antibacterial Properties |
| title_full | Green Synthesis of Flower-Like Carrageenan-Silver Nanoparticles and Elucidation of Its Physicochemical and Antibacterial Properties |
| title_fullStr | Green Synthesis of Flower-Like Carrageenan-Silver Nanoparticles and Elucidation of Its Physicochemical and Antibacterial Properties |
| title_full_unstemmed | Green Synthesis of Flower-Like Carrageenan-Silver Nanoparticles and Elucidation of Its Physicochemical and Antibacterial Properties |
| title_short | Green Synthesis of Flower-Like Carrageenan-Silver Nanoparticles and Elucidation of Its Physicochemical and Antibacterial Properties |
| title_sort | green synthesis of flower like carrageenan silver nanoparticles and elucidation of its physicochemical and antibacterial properties |
| topic | silver nanoparticles silver nanoflower green synthesis carrageenan antibacterial |
| url | https://www.mdpi.com/1420-3049/28/2/907 |
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