Core-composite mediated separation of diverse nanoparticles to purity

TitleCore-composite mediated separation of diverse nanoparticles to purity
Publication TypeJournal Article
Year of Publication2019
AuthorsBhatt, CS, Nagaraj, B, Ghosh, D, Ramasamy, S, Thapa, R, Marpu, SB, Suresh, AK
JournalSoft Matter
Volume15
Issue39
Pagination7787-7794
Date PublishedOCT
Type of ArticleArticle
ISSN1744-683X
Abstract

A generalized method for sorting nanoparticles based on their cores does not exist; it is an immediate necessity, and an approach incorporating cost-effectiveness and biocompatibility is in demand. Therefore, an efficient method for the separation of various mixed core-compositions or dissimilar metallic nanoparticles to their pure forms at the nano-bio interface was developed. Various simple core-combinations of monodispersed nanoparticles with dual cores, including silver plus gold, iron oxide plus gold and platinum plus gold, to the complex three-set core-combinations of platinum plus gold plus silver and platinum plus iron plus gold were sorted using step-gradient centrifugation in a sucrose suspension. Viscosity mediated differential terminal velocities of the nanoparticles permitted diversified dragging at different gradients allowing separation. Stability, purity and properties of the nanoparticles during separation were evaluated based on visual confirmation and by employing advanced instrumentations. Moreover, theoretical studies validated our experimental observations, revealing the roles of various parameters, such as the viscosity of sucrose, the density of the particles and the velocity and duration of centrifugation, involved during the separation process. This remarkably rapid, cost-efficient and sustainable strategy can be adapted to separate other cores of nanoparticles for various biomedical research purposes, primarily to understand nanoparticle induced toxicity and particle fate and transformations in natural biotic environments.

DOI10.1039/c9sm01571j
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

3.709

Divison category: 
Biochemical Sciences

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