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Customizable Ligand Exchange for Tailored Surface Property of Noble Metal Nanocrystals

It is highly desirable, while still challenging, to obtain noble metal nanocrystals with custom capping ligands, because their colloidal synthesis relies on specific capping ligands for the shape control while conventional ligand exchange processes suffer from “the strong replaces the weak” limitati...

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Autores principales: Fan, Qikui, Yang, Hao, Ge, Juan, Zhang, Shumeng, Liu, Zhaojun, Lei, Bo, Cheng, Tao, Li, Youyong, Yin, Yadong, Gao, Chuanbo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: AAAS 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6998038/
https://www.ncbi.nlm.nih.gov/pubmed/32025660
http://dx.doi.org/10.34133/2020/2131806
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author Fan, Qikui
Yang, Hao
Ge, Juan
Zhang, Shumeng
Liu, Zhaojun
Lei, Bo
Cheng, Tao
Li, Youyong
Yin, Yadong
Gao, Chuanbo
author_facet Fan, Qikui
Yang, Hao
Ge, Juan
Zhang, Shumeng
Liu, Zhaojun
Lei, Bo
Cheng, Tao
Li, Youyong
Yin, Yadong
Gao, Chuanbo
author_sort Fan, Qikui
collection PubMed
description It is highly desirable, while still challenging, to obtain noble metal nanocrystals with custom capping ligands, because their colloidal synthesis relies on specific capping ligands for the shape control while conventional ligand exchange processes suffer from “the strong replaces the weak” limitation, which greatly hinders their applications. Herein, we report a general and effective ligand exchange approach that can replace the native capping ligands of noble metal nanocrystals with virtually any type of ligands, producing flexibly tailored surface properties. The key is to use diethylamine with conveniently switchable binding affinity to the metal surface as an intermediate ligand. As a strong ligand, it in its original form can effectively remove the native ligands; while protonated, it loses its binding affinity and facilitates the adsorption of new ligands, especially weak ones, onto the metal surface. By this means, the irreversible order in the conventional ligand exchange processes could be overcome. The efficacy of the strategy is demonstrated by mutual exchange of the capping ligands among cetyltrimethylammonium, citrate, polyvinylpyrrolidone, and oleylamine. This novel strategy significantly expands our ability to manipulate the surface property of noble metal nanocrystals and extends their applicability to a wide range of fields, particularly biomedical applications.
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spelling pubmed-69980382020-02-05 Customizable Ligand Exchange for Tailored Surface Property of Noble Metal Nanocrystals Fan, Qikui Yang, Hao Ge, Juan Zhang, Shumeng Liu, Zhaojun Lei, Bo Cheng, Tao Li, Youyong Yin, Yadong Gao, Chuanbo Research (Wash D C) Research Article It is highly desirable, while still challenging, to obtain noble metal nanocrystals with custom capping ligands, because their colloidal synthesis relies on specific capping ligands for the shape control while conventional ligand exchange processes suffer from “the strong replaces the weak” limitation, which greatly hinders their applications. Herein, we report a general and effective ligand exchange approach that can replace the native capping ligands of noble metal nanocrystals with virtually any type of ligands, producing flexibly tailored surface properties. The key is to use diethylamine with conveniently switchable binding affinity to the metal surface as an intermediate ligand. As a strong ligand, it in its original form can effectively remove the native ligands; while protonated, it loses its binding affinity and facilitates the adsorption of new ligands, especially weak ones, onto the metal surface. By this means, the irreversible order in the conventional ligand exchange processes could be overcome. The efficacy of the strategy is demonstrated by mutual exchange of the capping ligands among cetyltrimethylammonium, citrate, polyvinylpyrrolidone, and oleylamine. This novel strategy significantly expands our ability to manipulate the surface property of noble metal nanocrystals and extends their applicability to a wide range of fields, particularly biomedical applications. AAAS 2020-01-21 /pmc/articles/PMC6998038/ /pubmed/32025660 http://dx.doi.org/10.34133/2020/2131806 Text en Copyright © 2020 Qikui Fan et al. http://creativecommons.org/licenses/by/4.0/ Exclusive Licensee Science and Technology Review Publishing House. Distributed under a Creative Commons Attribution License (CC BY 4.0).
spellingShingle Research Article
Fan, Qikui
Yang, Hao
Ge, Juan
Zhang, Shumeng
Liu, Zhaojun
Lei, Bo
Cheng, Tao
Li, Youyong
Yin, Yadong
Gao, Chuanbo
Customizable Ligand Exchange for Tailored Surface Property of Noble Metal Nanocrystals
title Customizable Ligand Exchange for Tailored Surface Property of Noble Metal Nanocrystals
title_full Customizable Ligand Exchange for Tailored Surface Property of Noble Metal Nanocrystals
title_fullStr Customizable Ligand Exchange for Tailored Surface Property of Noble Metal Nanocrystals
title_full_unstemmed Customizable Ligand Exchange for Tailored Surface Property of Noble Metal Nanocrystals
title_short Customizable Ligand Exchange for Tailored Surface Property of Noble Metal Nanocrystals
title_sort customizable ligand exchange for tailored surface property of noble metal nanocrystals
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6998038/
https://www.ncbi.nlm.nih.gov/pubmed/32025660
http://dx.doi.org/10.34133/2020/2131806
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