Positron annihilation spectroscopy: a new frontier for understanding nanoparticle-loaded polymer brushes. (2nd December 2015)

• Record Type: Journal Article
• Authors: Panzarasa, Guido; Aghion, Stefano; Soliveri, Guido; Consolati, Giovanni; Ferragut, Rafael
• Is Part Of: Nanotechnology. Volume 27:Number 2(2016)
• Publication Date: 2015-12-02
• Subjects: polymer brushes -- positron annihilation spectroscopy -- stimuli-responsive -- grafting-from -- SI-ATRP -- silver nanoparticles; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/0957-4484/27/2/02LT03
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Nanoparticle-loaded polymer brushes are powerful tools for the development of innovative devices. However, their characterization is challenging and arrays of different techniques are typically required to gain sufficient insight. Here we demonstrate for the first time the suitability of positron annihilation spectroscopy (PAS) to investigate, with unprecedented detail and without making the least damage to samples, the physico-chemical changes experienced by pH-responsive polymer brushes after protonation and after loading of silver nanoparticles. One of the most important findings is the depth profiling of silver nanoparticles inside the brushes. These results open up a completely new way to understand the structure and behavior of such complex systems.