Controllable Preparation of Gold Nanocrystals with Different Porous Structures for SERS Sensing
Porous Au nanocrystals (Au NCs) have been widely used in catalysis, sensing, and biomedicine due to their excellent localized surface plasma resonance effect and a large number of active sites exposed by three-dimensional internal channels. Here, we developed a ligand-induced one-step method for the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/5/2316 |
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| author | Yazhou Qin Dewang Fang Yulun Wu Yuanzhao Wu Weixuan Yao |
| author_facet | Yazhou Qin Dewang Fang Yulun Wu Yuanzhao Wu Weixuan Yao |
| author_sort | Yazhou Qin |
| collection | DOAJ |
| description | Porous Au nanocrystals (Au NCs) have been widely used in catalysis, sensing, and biomedicine due to their excellent localized surface plasma resonance effect and a large number of active sites exposed by three-dimensional internal channels. Here, we developed a ligand-induced one-step method for the controllable preparation of mesoporous, microporous, and hierarchical porous Au NCs with internal 3D connecting channels. At 25 °C, using glutathione (GTH) as both a ligand and reducing agent combined with the Au precursor to form GTH–Au(I), and under the action of the reducing agent ascorbic acid, the Au precursor is reduced in situ to form a dandelion-like microporous structure assembled by Au rods. When cetyltrimethylammonium bromide (C<sub>16</sub>TAB) and GTH are used as ligands, mesoporous Au NCs formed. When increasing the reaction temperature to 80 °C, hierarchical porous Au NCs with both microporous and mesoporous structures will be synthesized. We systematically explored the effect of reaction parameters on porous Au NCs and proposed possible reaction mechanisms. Furthermore, we compared the SERS-enhancing effect of Au NCs with three different pore structures. With hierarchical porous Au NCs as the SERS base, the detection limit for rhodamine 6G (R6G) reached 10<sup>−10</sup> M. |
| first_indexed | 2024-03-11T07:16:33Z |
| format | Article |
| id | doaj.art-65d24f6bc79f495293782a03e7a98692 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T07:16:33Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
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| series | Molecules |
| spelling | doaj.art-65d24f6bc79f495293782a03e7a986922023-11-17T08:15:01ZengMDPI AGMolecules1420-30492023-03-01285231610.3390/molecules28052316Controllable Preparation of Gold Nanocrystals with Different Porous Structures for SERS SensingYazhou Qin0Dewang Fang1Yulun Wu2Yuanzhao Wu3Weixuan Yao4Key Laboratory of Drug Prevention and Control Technology of Zhejiang Province, Zhejiang Police College, Hangzhou 310053, ChinaKey Laboratory of Drug Prevention and Control Technology of Zhejiang Province, Zhejiang Police College, Hangzhou 310053, ChinaKey Laboratory of Drug Prevention and Control Technology of Zhejiang Province, Zhejiang Police College, Hangzhou 310053, ChinaKey Laboratory of Drug Prevention and Control Technology of Zhejiang Province, Zhejiang Police College, Hangzhou 310053, ChinaKey Laboratory of Drug Prevention and Control Technology of Zhejiang Province, Zhejiang Police College, Hangzhou 310053, ChinaPorous Au nanocrystals (Au NCs) have been widely used in catalysis, sensing, and biomedicine due to their excellent localized surface plasma resonance effect and a large number of active sites exposed by three-dimensional internal channels. Here, we developed a ligand-induced one-step method for the controllable preparation of mesoporous, microporous, and hierarchical porous Au NCs with internal 3D connecting channels. At 25 °C, using glutathione (GTH) as both a ligand and reducing agent combined with the Au precursor to form GTH–Au(I), and under the action of the reducing agent ascorbic acid, the Au precursor is reduced in situ to form a dandelion-like microporous structure assembled by Au rods. When cetyltrimethylammonium bromide (C<sub>16</sub>TAB) and GTH are used as ligands, mesoporous Au NCs formed. When increasing the reaction temperature to 80 °C, hierarchical porous Au NCs with both microporous and mesoporous structures will be synthesized. We systematically explored the effect of reaction parameters on porous Au NCs and proposed possible reaction mechanisms. Furthermore, we compared the SERS-enhancing effect of Au NCs with three different pore structures. With hierarchical porous Au NCs as the SERS base, the detection limit for rhodamine 6G (R6G) reached 10<sup>−10</sup> M.https://www.mdpi.com/1420-3049/28/5/2316porous materialgold nanocrystalscontrolled growthSERS |
| spellingShingle | Yazhou Qin Dewang Fang Yulun Wu Yuanzhao Wu Weixuan Yao Controllable Preparation of Gold Nanocrystals with Different Porous Structures for SERS Sensing Molecules porous material gold nanocrystals controlled growth SERS |
| title | Controllable Preparation of Gold Nanocrystals with Different Porous Structures for SERS Sensing |
| title_full | Controllable Preparation of Gold Nanocrystals with Different Porous Structures for SERS Sensing |
| title_fullStr | Controllable Preparation of Gold Nanocrystals with Different Porous Structures for SERS Sensing |
| title_full_unstemmed | Controllable Preparation of Gold Nanocrystals with Different Porous Structures for SERS Sensing |
| title_short | Controllable Preparation of Gold Nanocrystals with Different Porous Structures for SERS Sensing |
| title_sort | controllable preparation of gold nanocrystals with different porous structures for sers sensing |
| topic | porous material gold nanocrystals controlled growth SERS |
| url | https://www.mdpi.com/1420-3049/28/5/2316 |
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