Seed-Mediated Synthesis of Thin Gold Nanoplates with Tunable Edge Lengths and Optical Properties
Thin Au nanoplates show intriguing localized surface plasmon resonance (LSPR) properties with potential applications in various fields. The conventional synthesis of Au nanoplates usually involves the formation of spherical nanoparticles or produces nanoplates with large thicknesses. Herein, we demo...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-02-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/13/4/711 |
| _version_ | 1797618957523353600 |
|---|---|
| author | Zhun Qiao Xinyu Wei Hongpo Liu Kai Liu Chuanbo Gao |
| author_facet | Zhun Qiao Xinyu Wei Hongpo Liu Kai Liu Chuanbo Gao |
| author_sort | Zhun Qiao |
| collection | DOAJ |
| description | Thin Au nanoplates show intriguing localized surface plasmon resonance (LSPR) properties with potential applications in various fields. The conventional synthesis of Au nanoplates usually involves the formation of spherical nanoparticles or produces nanoplates with large thicknesses. Herein, we demonstrate a synthesis of uniform thin Au nanoplates by using Au–Ag alloy nanoframes obtained by the galvanic replacement of Ag nanoplates with HAuCl<sub>4</sub> as the seeds and a sulfite (SO<sub>3</sub><sup>2−</sup>) as a ligand. The SO<sub>3</sub><sup>2−</sup> ligand not only complexes with the Au salt for the controlled reduction kinetics but also strongly adsorbs on Au {111} facets for effectively constraining the crystal growth on both basal sides of the Au nanoplates for controlled shape and reduced thicknesses. This seed-mediated synthesis affords Au nanoplates with a thickness of only 7.5 nm, although the thickness increases with the edge length. The edge length can be customizable in a range of 48–167 nm, leading to tunable LSPR bands in the range of 600–1000 nm. These thin Au nanoplates are applicable not only to surface-enhanced Raman spectroscopy with enhanced sensitivity and reliability but also to a broader range of LSPR-based applications. |
| first_indexed | 2024-03-11T08:19:58Z |
| format | Article |
| id | doaj.art-7b49708eb7d04d418ab813063ad9a1d9 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T08:19:58Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-7b49708eb7d04d418ab813063ad9a1d92023-11-16T22:27:55ZengMDPI AGNanomaterials2079-49912023-02-0113471110.3390/nano13040711Seed-Mediated Synthesis of Thin Gold Nanoplates with Tunable Edge Lengths and Optical PropertiesZhun Qiao0Xinyu Wei1Hongpo Liu2Kai Liu3Chuanbo Gao4Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710054, ChinaFrontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710054, ChinaFrontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710054, ChinaFrontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710054, ChinaFrontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710054, ChinaThin Au nanoplates show intriguing localized surface plasmon resonance (LSPR) properties with potential applications in various fields. The conventional synthesis of Au nanoplates usually involves the formation of spherical nanoparticles or produces nanoplates with large thicknesses. Herein, we demonstrate a synthesis of uniform thin Au nanoplates by using Au–Ag alloy nanoframes obtained by the galvanic replacement of Ag nanoplates with HAuCl<sub>4</sub> as the seeds and a sulfite (SO<sub>3</sub><sup>2−</sup>) as a ligand. The SO<sub>3</sub><sup>2−</sup> ligand not only complexes with the Au salt for the controlled reduction kinetics but also strongly adsorbs on Au {111} facets for effectively constraining the crystal growth on both basal sides of the Au nanoplates for controlled shape and reduced thicknesses. This seed-mediated synthesis affords Au nanoplates with a thickness of only 7.5 nm, although the thickness increases with the edge length. The edge length can be customizable in a range of 48–167 nm, leading to tunable LSPR bands in the range of 600–1000 nm. These thin Au nanoplates are applicable not only to surface-enhanced Raman spectroscopy with enhanced sensitivity and reliability but also to a broader range of LSPR-based applications.https://www.mdpi.com/2079-4991/13/4/711Au nanoplatesthin nanoplatesseed-mediated synthesissize engineeringsurface-enhanced Raman scatting |
| spellingShingle | Zhun Qiao Xinyu Wei Hongpo Liu Kai Liu Chuanbo Gao Seed-Mediated Synthesis of Thin Gold Nanoplates with Tunable Edge Lengths and Optical Properties Nanomaterials Au nanoplates thin nanoplates seed-mediated synthesis size engineering surface-enhanced Raman scatting |
| title | Seed-Mediated Synthesis of Thin Gold Nanoplates with Tunable Edge Lengths and Optical Properties |
| title_full | Seed-Mediated Synthesis of Thin Gold Nanoplates with Tunable Edge Lengths and Optical Properties |
| title_fullStr | Seed-Mediated Synthesis of Thin Gold Nanoplates with Tunable Edge Lengths and Optical Properties |
| title_full_unstemmed | Seed-Mediated Synthesis of Thin Gold Nanoplates with Tunable Edge Lengths and Optical Properties |
| title_short | Seed-Mediated Synthesis of Thin Gold Nanoplates with Tunable Edge Lengths and Optical Properties |
| title_sort | seed mediated synthesis of thin gold nanoplates with tunable edge lengths and optical properties |
| topic | Au nanoplates thin nanoplates seed-mediated synthesis size engineering surface-enhanced Raman scatting |
| url | https://www.mdpi.com/2079-4991/13/4/711 |
| work_keys_str_mv | AT zhunqiao seedmediatedsynthesisofthingoldnanoplateswithtunableedgelengthsandopticalproperties AT xinyuwei seedmediatedsynthesisofthingoldnanoplateswithtunableedgelengthsandopticalproperties AT hongpoliu seedmediatedsynthesisofthingoldnanoplateswithtunableedgelengthsandopticalproperties AT kailiu seedmediatedsynthesisofthingoldnanoplateswithtunableedgelengthsandopticalproperties AT chuanbogao seedmediatedsynthesisofthingoldnanoplateswithtunableedgelengthsandopticalproperties |