Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/12203
Title: Gadolinium and polythiophene functionalized polyurea polymer dots as fluoro-magnetic nanoprobes
Authors: Karabacak, Soner
Palaniappan, Alagappan
Tony, Tsang Siu Hon
Edwin, Teo Hang Tong
Gulyás, Balázs
Padmanabhan, Parasuraman
Yıldız, Ümit Hakan
Izmir Institute of Technology
Nanyang Technological University
Nanyang Technological University
Nanyang Technological University
Nanyang Technological University
Nanyang Technological University
Izmir Institute of Technology
Keywords: Bioimaging
Dual-functional reporters
Fluorescent reporters
Polymer dots
Issue Date: Feb-2022
Publisher: MDPI
Abstract: A rapid and one-pot synthesis of poly 3-thiopheneacetic acid (PTAA) functionalized pol-yurea polymer dots (Pdots) using polyethyleneimine and isophorone diisocyanate is reported. The one-pot mini-emulsion polymerization technique yielded Pdots with an average diameter of ~20 nm. The size, shape, and concentration of the surface functional groups could be controlled by al-tering the synthesis parameters such as ultrasonication time, concentration of the surfactant, and crosslinking agent, and the types of isocyanates utilized for the synthesis. Colloidal properties of Pdots were characterized using dynamic light scattering and zeta potential measurements. The spherical geometry of Pdots was confirmed by scanning electron microscopy. The Pdots were post-functionalized by 1,4,7,10 tetraazacyclododecane-1,4,7,10-tetraacetic acid for chelating gadolinium nanoparticles (Gd3+) that provide magnetic properties to the Pdots. Thus, the synthesized Pdots possess fluorescent and magnetic properties, imparted by PTAA and Gd3+, respectively. Fluorescence spectroscopy and microscopy revealed that the synthesized dual-functional Gd3+-Pdots ex-hibited detectable fluorescent signals even at lower concentrations. Magnetic levitation experiments indicated that the Gd3+-Pdots could be easily manipulated via an external magnetic field. These findings illustrate that the dua-functional Gd3+-Pdots could be potentially utilized as fluorescent reporters that can be magnetically manipulated for bioimaging applications.
URI: https://doi.org/10.3390/nano12040642
https://hdl.handle.net/11147/12203
Appears in Collections:Chemistry / Kimya
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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