Surface modification of gold nanorods through a place exchange reaction inside an ionic exchange resin

2008 ◽  
pp. 2858 ◽  
Author(s):  
Qiu Dai ◽  
Janelle Coutts ◽  
Jianhua Zou ◽  
Qun Huo
Keyword(s):  
Surface Modification ◽  
Exchange Reaction ◽  
Gold Nanorods ◽  
Exchange Resin ◽  
Ionic Exchange ◽  
Place Exchange

Differential reactivity of the inner and outer positions of Au25(SCH2CH2Ph)18 dimeric staples under place exchange conditions

2015 ◽  
Vol 51 (15) ◽  
pp. 3204-3207 ◽  
Author(s):  
Paolo Pengo ◽  
Cristian Bazzo ◽  
Mariangela Boccalon ◽  
Lucia Pasquato
Keyword(s):  
Exchange Reaction ◽  
Differential Reactivity ◽  
Site Selectivity ◽  
Place Exchange

The site selectivity of the place exchange reaction at the two inequivalent positions of the neutral Au25(SCH2CH2Ph)18 staples depends on the nature of the incoming thiol.

Surface modification of gold nanorods using layer-by-layer technique for cellular uptake

2007 ◽  
Vol 10 (1) ◽  
pp. 221-228 ◽  
Author(s):  
Hironobu Takahashi ◽  
Takuro Niidome ◽  
Takahito Kawano ◽  
Sunao Yamada ◽  
Yasuro Niidome
Keyword(s):  
Surface Modification ◽  
Cellular Uptake ◽  
Gold Nanorods ◽  
Layer By Layer ◽  
Layer Technique ◽  
Layer By Layer Technique

Radical Mechanism of a Place-Exchange Reaction of Au Nanoparticles

2005 ◽  
Vol 44 (24) ◽  
pp. 3720-3722 ◽  
Author(s):  
Petre Ionita ◽  
Bruce C. Gilbert ◽  
Victor Chechik
Keyword(s):  
Exchange Reaction ◽  
Au Nanoparticles ◽  
Radical Mechanism ◽  
Place Exchange

scholarly journals Winslow effect in ionic exchange resin dispersion

1977 ◽  
Vol 20 (149) ◽  
pp. 1476-1483 ◽  
Author(s):  
Noboru SUGIMOTO
Keyword(s):  
Exchange Resin ◽  
Ionic Exchange

Surface Modification of Cetyltrimethylammonium Bromide-Capped Gold Nanorods to Make Molecular Probes

Langmuir ◽  
2007 ◽  
Vol 23 (17) ◽  
pp. 9114-9119 ◽  
Author(s):  
Chenxu Yu ◽  
Leo Varghese ◽  
Joseph Irudayaraj
Keyword(s):  
Surface Modification ◽  
Gold Nanorods ◽  
Cetyltrimethylammonium Bromide ◽  
Molecular Probes

scholarly journals Thermodynamics of Uni-Univalent H+/K+ and Uni-Bivalent H+/Ca2+ Ion Exchange Reactions Using Nuclear Grade Resin Indion-223

2014 ◽  
Vol 33 ◽  
pp. 190-198
Author(s):  
Pravin U. Singare ◽  
Akmal L. Khan Mohammed ◽  
N.N. Dixit
Keyword(s):  
Ion Exchange ◽  
Exchange Reaction ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Equilibrium Constants ◽  
Ionic Species ◽  
Nuclear Grade ◽  
Exchange Reactions ◽  
Efficient Separation ◽  
Ion Exchange Reaction

The present paper deals with the thermodynamic of uni-univalent and uni-bivalent ion exchange reactions using nuclear grade anion exchange resin Indion-223. It was observed that with rise in temperature the equilibrium constants K values for H+/K+ uni-univalet ion exchange reaction increases from 0.01710 to 0.02374. Similarly for H+/Ca2+ uni-bivalet ion exchange reaction the equilibrium constants K values increases from 0.000397 to 0.000639. The increase in K values with rise in temperature for both the reactions indicates its endothermic nature having the enthalpy change values of 22.72 and 38.92 kJ/ mol respectively. The technique used here can be extended further to standardise the process parameters in order to bring about the efficient separation of the desired ionic species from the solution

The Influence of Hydrophilic Decoration on X-ray Excited Luminescence Nanoparticles to Singlet Oxygen Production

NANO ◽  
2020 ◽  
Vol 15 (07) ◽  
pp. 2050092
Author(s):  
Xiaosheng Zhu ◽  
Yi Tian ◽  
Lei Dai ◽  
Qiaofeng Wang ◽  
Mei Shi ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Exchange Reaction ◽  
X Ray ◽  
Good Biocompatibility ◽  
Place Exchange ◽  
High Concentrations ◽  
Excited Luminescence ◽  
Tumor Inhibition Rate

(1) Background: Though X-ray excited photodynamic therapy (X-PDT) breakthrough the bottom neck of PDT application in deep tumor by overcoming light penetration depth limitation, the quantum yield of the hydrophilic X-PDT nanoparticles (NPs) still hampered its further application in vivo. Thus, establishing a proper hydrophilic decoration method which can maximally maintain the quantum yield of X-ray excited luminescent NPs is of urgent demand. (2) Methods: We synthesized NaGdF4: [Formula: see text] (NGF) as X-ray excited luminescent NPs and conducted hydrophilic decoration by two hydrophilic ligands, polyethylene glycol-NH2 (PEG) and cysteamine (Cy) via place exchange reaction, and coupled with photosensitizer (MC540) to form a X-PDT nanosystem. We also conducted experiments in vitro and in vivo to evaluate the efficacy of the X-PDT system. (3) Results: Both PEG and Cy decoration NPs presented excellent emission intensity, which could well excite the coupled photosensitizer MC540 to generate significant X-PDT efficacy under low-dose X-ray radiation. Especially for the NGF-Cy-MC540 treatment group, the cell viability reduced to [Formula: see text]% under 0.3[Formula: see text]Gy radiation and [Formula: see text]% under only 0.1[Formula: see text]Gy radiation, which is the lowest radiation dosage in the literature reports so far. In vivo experiment showed about 36% of tumor inhibition rate under 0.3[Formula: see text]Gy X-ray. Besides, no biotoxicity was observed in NGF groups even in high concentrations, demonstrating good biocompatibility. (4) Conclusions: The hydrophilic decoration method by Cy or PEG via place exchange reaction may pave a brand new way and strategy for X-PDT further clinical application.

scholarly journals Preparation, toxicity reduction and radiation therapy application of gold nanorods

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Lina Xie ◽  
Xujia Zhang ◽  
Chengchao Chu ◽  
Yingqi Dong ◽  
Tianzi Zhang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Radiation Therapy ◽  
Surface Modification ◽  
Gold Nanorods ◽  
Photothermal Therapy ◽  
Near Infrared ◽  
Research Progress ◽  
Broad Application ◽  
Toxicity Reduction ◽  
Biomedical Fields

AbstractGold nanorods (GNRs) have a broad application prospect in biomedical fields because of their unique properties and controllable surface modification. The element aurum (Au) with high atomic number (high-Z) render GNRs ideal radiosensitive materials for radiation therapy and computed tomography (CT) imaging. Besides, GNRs have the capability of efficiently converting light energy to heat in the near-infrared (NIR) region for photothermal therapy. Although there are more and more researches on GNRs for radiation therapy, how to improve their biocompatibility and how to efficiently utilize them for radiation therapy should be further studied. This review will focuse on the research progress regarding the preparation and toxicity reduction of GNRs, as well as GNRs-mediated radiation therapy. Graphical Abstract

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