Salt Plays a Pivotal Role in the Temperature-Responsive Aggregation and Layer-by-Layer Assembly of Polymer-Decorated Gold Nanoparticles

Citations Over TimeTop 10% of 2013 papers

Abstract

We report that the aqueous self-assembly behavior of citrate based gold nanoparticles decorated with the temperature responsive RAFT-based polymer poly(N-isopropylacrylamide) critically depends on the presence of salt in the medium. Both for temperature induced reversible agglomeration and for hydrogen bonding based layer-by-layer assembly with tannic acid, the presence of salt dramatically promotes the assembly behavior. We attribute this to a combination of ionic screening of the remaining citrate groups on the nanoparticle surface and a salting out effect which increases the contribution of hydrophobic interactions in the self-assembly process. These findings provide new insights into an attractive class of polymer/gold hybrid nanomaterials that can find application in biotechnology, catalysis, and biomedicine.

Related Papers

• → Development of anti-microbial jute fabrics via in situ formation of cellulose–tannic acid–metal ion complex(2009)56 cited
• → Tannic Acid as a Natural Ferroptosis Inhibitor: Mechanisms and Beneficial Role of 3’‐ O ‐Galloylation(2021)10 cited
• → Effective Lac Dyeing of Cotton Fabric by Pretreating with Tannic Acid and Aluminum Acetate(2010)6 cited
• → Behaviour of tannic acid from various commercial sources towards redox, metal complexing and protein precipitation assays of tannins(1993)43 cited
• → Sb2O3 prices raised four times in twelve months(2002)