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Colloid and Polymer Science

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26-02-2019 | Original Contribution

Luminescent core@shell nanoparticles functionalized with PEG for biological applications

Authors: Shivani Bharti, Gurvir Kaur, Shikha Gupta, S. K. Tripathi

Published in: Colloid and Polymer Science | Issue 4/2019

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Abstract

In this manuscript, synthesis of TGA (thioglycolic acid) capped core@shell CdSe@CdS nanoparticles (NPs) has been done using chemical route. PEG-diamine has been used to functionalize spherical core@shell CdSe@CdS NPs by carbodiimide chemistry, which is very simple and effective method to make stable bond between NH₂ group and COOH group. Optical properties include UV-Visible absorption and fluorescence emission that show the higher polydispersity and enhanced emission intensity of CdSe@CdS-PEG NPs in comparison to CdSe@CdS core@shell NPs. FT-IR results of CdSe@CdS-PEG NPs indicate the intermolecular interaction between PEG-diamine and TGA capped CdSe@CdS core@shell NPs. The emission intensity of CdSe@CdS and CdSe@CdS-PEG NPs is highest when dispersed in pH 6 medium which is low acidic in nature. Therefore, these colloidal NPs can be used for applications in the pH range (6–8), due to their stability and higher fluorescence emission in this pH range.

previous article Surface decorating of CH3NH3PbBr3 nanoparticles with chemically adsorbed porphyrin

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Title: Luminescent core@shell nanoparticles functionalized with PEG for biological applications
Authors: Shivani Bharti
Gurvir Kaur
Shikha Gupta
S. K. Tripathi
Publication date: 26-02-2019
Publisher: Springer Berlin Heidelberg
Published in: Colloid and Polymer Science / Issue 4/2019
Print ISSN: 0303-402X
Electronic ISSN: 1435-1536
DOI: https://doi.org/10.1007/s00396-019-04483-9

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