Polyethylenimine as a Versatile Simultaneous Reducing and Stabilizing Agent Enabling One-Pot Synthesis of Transition-Metal Nanoparticles: Fundamental Aspects and Practical Implications

Ribeiro, Caroline A. S.; Panico, Karine; Handajevsky, Tamara J.; da Silva, Fernanda Dias; Bellettini, Ismael C.; Pavlova, Ewa; Giacomelli, Fernando C.

doi:10.1021/acs.langmuir.3c02538

Langmuir

2023

DOI: 10.1021/acs.langmuir.3c02538

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Polyethylenimine as a Versatile Simultaneous Reducing and Stabilizing Agent Enabling One-Pot Synthesis of Transition-Metal Nanoparticles: Fundamental Aspects and Practical Implications

Caroline A. S. Ribeiro,

Karine Panico,

Tamara J. Handajevsky

et al.

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2024

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Cited by 2 publications

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One-pot bottom-up synthesis of gold nanoparticles mediated by nitrogen-containing polymers: The role of chain features and environmental conditions

Mondo,

da Silva Ribeiro,

Schlüter

et al. 2024

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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One-pot bottom-up synthesis of gold nanoparticles mediated by nitrogen-containing polymers: The role of chain features and environmental conditions

Mondo,

da Silva Ribeiro,

Schlüter

et al. 2024

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Controlled Spread of a Ag Layer from the Core to the Tip along the Branches of AuAg Nanostars for Improved SERS Detection of Okadaic Acid in Shellfish

Li,

Zhu,

Weng

et al. 2024

ACS Sens.

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Plasmonic Au–Ag nanostars are excellent surface-enhanced Raman scattering (SERS) probes due to bimetallic coupling and the tip effect. However, the existing preparation methods of AuAg nanostars cannot achieve controlled growth of the Ag layer on the branches of nanostars and so cannot display their SERS to the maximum extent, thus limiting its sensitivity in biosensing. Herein, a novel strategy “PEI (polyethylenimine)-guided Ag deposition method” is proposed for synthesizing AuAg core–shell nanostars (AuAg@Ag NS) with a tunable distribution of the Ag layer from the core to the tip, which offers an avenue for investigating the correlation between SERS efficiency and the extent of spread of the Ag layer. It is found that AuAg@Ag NS with a Ag layer coated the whole branch has the strongest SERS performance because the coupling between the tips and Ag layer is maximized. Meanwhile, as a completely closed core–shell structure, AuAg@Ag NS can confine and anchor 4-ATP inside the Ag layer to avoid an unstable SERS signal. By connecting the aptamer, a reliable internal standard nanoprobe with a SERS enhancement factor (EF) up to 1.86 × 108 is prepared. Okada acid is detected through competitive adsorption of this SERS probes, and the detection limit is 36.6 pM. The results gain fundamental insights into tailoring the nanoparticle morphologies and preparation of internal standard nanoprobes and also provide a promising avenue for marine toxin detection in food safety.

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Polyethylenimine as a Versatile Simultaneous Reducing and Stabilizing Agent Enabling One-Pot Synthesis of Transition-Metal Nanoparticles: Fundamental Aspects and Practical Implications

Cited by 2 publications

References 76 publications

One-pot bottom-up synthesis of gold nanoparticles mediated by nitrogen-containing polymers: The role of chain features and environmental conditions

One-pot bottom-up synthesis of gold nanoparticles mediated by nitrogen-containing polymers: The role of chain features and environmental conditions

Controlled Spread of a Ag Layer from the Core to the Tip along the Branches of AuAg Nanostars for Improved SERS Detection of Okadaic Acid in Shellfish

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