Seeded growth of gold-based nanostructures regulated by controlled doping

Min, Yuanyuan; Sun, Haoyu; Zheng, Yiqun

doi:10.1039/d3ce00877k

CrystEngComm

2024

DOI: 10.1039/d3ce00877k

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Seeded growth of gold-based nanostructures regulated by controlled doping

Yuanyuan Min,

Haoyu Sun,

Yiqun Zheng

Abstract: Seeded growth has been widely accepted as a vital synthetic strategy to achieve noble metal nanocrystals with high quality (i.e., high uniformity in size/shape) and versatile control over the morphology...

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Selenium-Doped Seeded Growth of Truncated Octahedral Gold Nanocrystals with Surface Concavities for Surface-Enhanced Raman Spectroscopy

Han,

Chen,

Sun

et al. 2024

Langmuir

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Concave nanocrystals stand out as a testament to the importance of the nanoscale morphology in dictating the functional properties of materials. In this report, we introduce a facile synthesis method for producing gold (Au) nanocrystals with a truncated octahedral morphology that features surface concavities (Au CNTOs). The incorporation of selenium (Se) doping into the truncated octahedral Au seeds was essential for their enlargement and the formation of concave structures. By simply adjusting the quantity of seeds, we could control the size of the nanocrystals while maintaining their distinctive morphology and surface concavity. The formation mechanism suggests that Se doping likely passivates the side faces, thereby slowing growth and promoting atomic deposition at the edges and corners. The resulting Sedoped Au CNTOs exhibited strong localized surface plasmon resonance (LSPR) absorptions in the visible spectrum and the SERS performance of their assemblies was demonstrated through crystal violet detection, reaching enhancement factors around 10 5 . This study presents an innovative approach to synthesizing concave Au nanocrystals through the incorporation of selenium during a seeded growth process, offering insights into the strategic design of plasmonic nanostructures.

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Selenium-Doped Seeded Growth of Truncated Octahedral Gold Nanocrystals with Surface Concavities for Surface-Enhanced Raman Spectroscopy

Han,

Chen,

Sun

et al. 2024

Langmuir

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show abstract

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Seeded growth of gold-based nanostructures regulated by controlled doping

Abstract: Seeded growth has been widely accepted as a vital synthetic strategy to achieve noble metal nanocrystals with high quality (i.e., high uniformity in size/shape) and versatile control over the morphology...

Cited by 1 publication

References 68 publications

Selenium-Doped Seeded Growth of Truncated Octahedral Gold Nanocrystals with Surface Concavities for Surface-Enhanced Raman Spectroscopy

Selenium-Doped Seeded Growth of Truncated Octahedral Gold Nanocrystals with Surface Concavities for Surface-Enhanced Raman Spectroscopy

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