Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/80804
Title: Confined growth of multiple gold nanorices in dual-mesoporous silica nanospheres for improved computed tomography imaging and photothermal therapy
Authors: Qin, LM
Niu, DC
Jiang, Y
He, JP
Jia, XB
Zhao, WR
Li, P 
Li, YS
Keywords: Gold nanorices
Dual-mesoporous silica
Confined growth
Imaging
Photothermal effect
Issue Date: 2019
Publisher: Dove Medical Press
Source: International journal of nanomedicine, 2019, v. 14, p. 1519-1532 How to cite?
Journal: International journal of nanomedicine 
Abstract: Introduction: In this work, we have developed a novel "confined-growth" strategy to synthesize PEGylated multiple gold nanorices-encapsulated dual-mesoporous silica nanospheres (designated as PEGylated MGNRs@DMSSs) containing both small mesopores (2.5 nm) in the shell and large mesopores (21.7 nm) in the core based on a well-established, seed-mediated growth method. The photothermal effect and CT imaging ability were also studied.
Methods: The nanoparticles were characterized by Fourier transform infrared (FT-IR) spectra, N-2 absorption isotherms, Field-emission scanning electron microscopy (FE-SEM), Transmission electron microscopy (TEM), Inductively coupled plasma atomic emission spectroscopy (ICP-AES) and Confocal microscopy.
Results: The longitudinally-localized surface (LSPR) absorption properties of MGNRs@DMSSs can be easily tuned by altering the amount of HAuCl4 in the gold growth solution. Additionally, the resultant PEGylated MGNRs@DMSSs have monodispersed, spherical morphology and good colloidal stability in an aqueous solution. More importantly, when exposed to NIR irradiation, the PEGylated MGNRs@DMSSs exhibit both higher temperature increments and better photothermal effects than that of single PEGylated gold nanorods at nearly an equivalent LSPR absorption. In addition, as CT contrast agents, the PEGylated MGNRs@DMSSs display a better CT imaging performance, in comparison with single PEGylated gold nanorods at the same Au concentration.
Conclusion: Taken together, results indicate the potential for MGNRs@DMSSs used in CT imaging-guided photothermal therapy. Such a simple "confined-growth" strategy within a porous matrix offers a promising platform to design and prepare novel metal(s) oxide@silica nanocomposites for use in further cancer bio-imaging and therapy.
URI: http://hdl.handle.net/10397/80804
ISSN: 1176-9114
EISSN: 1178-2013
DOI: 10.2147/IJN.S184192
Rights: © 2019 Qin et al. This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License (http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms (https://www.dovepress.com/terms.php).
The following publication Qin, L. M., Niu, D. C., Jiang, Y., He, J. P., Jia, X. B., Zhao, W. R., ... & Li, Y. S. (2019). Confined growth of multiple gold nanorices in dual-mesoporous silica nanospheres for improved computed tomography imaging and photothermal therapy. International journal of nanomedicine, 14, 1519-1532 is available at https://dx.doi.org/10.2147/IJN.S184192
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