‘Nano‐impacts’: An Electrochemical Technique for Nanoparticle Sizing in Optically Opaque Solutions

ChemistryOpen

Her Shuang Toh¹ 

[1] Physical & Theoretical Chemistry Laboratory, Department of Chemistry, Oxford University, Oxford, UK

关键词: electrochemistry;    nano-impacts;    nanoparticles;    optically opaque media;    silver;    size determination;   

DOI  :  10.1002/open.201402161

来源: Wiley

【 摘 要 】

Abstract

Typical laser-dependent methods such as nanoparticle tracking analysis (NTA) and dynamic light scattering (DLS) are not able to detect nanoparticles in an optically opaque medium due to scattering or absorption of light. Here, the electrochemical technique of ‘nano-impacts’ was used to detect nanoparticles in solution in the presence of high levels of alumina particulates causing a milky white suspension. Using the ‘nano-impacts’ method, silver nanoparticles were successfully detected and sized in the model opaque medium. The results obtained compared well with those using transmission electron microscopy (TEM), an ex situ method for nanoparticle size determination. The ability to use the ‘nano-impacts’ method in media unmeasurable to competitor techniques confers a significant advantage on the electrochemical approach.

【 授权许可】

CC BY   
© 2014 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.

Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.