Polyamine Ligand‐Mediated Self‐Assembly of Gold and Silver Nanoparticles into Chainlike Structures in Aqueous Solution: Towards New Nanostructured Chemosensors

ChemistryOpen

Adrián Fernández-Lodeiro¹  Dr. Javier Fernández-Lodeiro¹  Dr. Cristina Núñez²  Prof. Rufina Bastida³  Dr. José Luis Capelo¹ 

[1]BIOSCOPE Group, REQUIMTE-CQFB, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, 2829-516, Monte da Caparica (Portugal)

[2]E-mail address: [3]Inorganic Chemistry Department, Faculty of Chemistry, University of Santiago de Compostela, 15782 Santiago de Compostela (Spain)

关键词: 1D nanochains;    self‐assembly;    gold;    mercury;    nanoparticles;    silver;   

DOI  :  10.1002/open.201300023

来源: Wiley

【 摘 要 】

Abstract

Polyamine ligands are very versatile compounds due to their water solubility and flexibility. In the present work, we have exploited the binding ability of a polyamine molecular linker (L²⁻) bearing different functional groups, which favors the self-assembling of silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) into 1D nanochains in aqueous solution. The chainlike assemblies of AuNPs and AgNPs were structurally stable for a long period of time, during which their characteristic optical properties remained unchanged. The mechanism of AuNPs and AgNPs chain assembly associated with the induction of electric dipole–dipole interactions arising from the partial ligand exchange of surface-adsorbed citrate ions by (L²⁻) was investigated. UV/Vis spectrophotometry and transmission electron microscopy (TEM) were used to determine timedependent structural changes associated with formation of the 1D nanoparticle structures. Finally, the sensing of Hg²⁺ in aqueous solution using AgNPs@(L)²⁻ and AuNPs@(L)²⁻ assemblies was also carried out in aqueous solution.

【 授权许可】

Unknown   
© 2013 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.