scholarly journals Efficient, robust surface functionalization and stabilization of gold nanorods with quaternary ammonium-containing ionomers as multidentate macromolecular ligands

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 43574-43590 ◽  
Author(s):  
Zhongmin Dong ◽  
Peng Xiang ◽  
Lingqi Huang ◽  
Zhibin Ye
Keyword(s):  
Surface Functionalization ◽  
Gold Nanorods ◽  
Quaternary Ammonium ◽  
Surface Ligands

Quaternary ammonium-containing ionomers are a novel class of multidentate macromolecular surface ligands for efficient functionalization and stabilization of gold nanorods.

scholarly journals Selective shortening of gold nanorods: when surface functionalization dictates the reactivity of nanostructures

Nanoscale ◽  
2020 ◽  
Vol 12 (44) ◽  
pp. 22658-22667
Author(s):  
Abdelali Khelfa ◽  
Jun Meng ◽  
Caroline Byun ◽  
Guillaume Wang ◽  
Jaysen Nelayah ◽  
...  
Keyword(s):  
Surface Functionalization ◽  
Gold Nanorods ◽  
Degradation Kinetics ◽  
Capping Agents

We reveal how degradation kinetics and capping agents drive the selective shortening of gold nanorods in oxidative media.

The surface chemistry of iron oxide nanocrystals: surface reduction of γ-Fe2O3 to Fe3O4 by redox-active catechol surface ligands

2018 ◽  
Vol 6 (2) ◽  
pp. 326-333 ◽  
Author(s):  
P. Daniel ◽  
S. I. Shylin ◽  
H. Lu ◽  
M. N. Tahir ◽  
M. Panthöfer ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Surface Chemistry ◽  
Surface Functionalization ◽  
Surface Ligands ◽  
Surface Reduction ◽  
Redox Active ◽  
Structural And Magnetic Properties ◽  
Effect Of Surface

The effect of surface functionalization on the structural and magnetic properties of catechol-functionalized iron oxide magnetic (γ-Fe2O3) nanocrystals was investigated.

scholarly journals Polydopamine-enabled surface functionalization of gold nanorods for cancer cell-targeted imaging and photothermal therapy

Nanomedicine ◽  
2013 ◽  
Vol 8 (1) ◽  
pp. 17-28 ◽  
Author(s):  
Kvar CL Black ◽  
Ji Yi ◽  
José G Rivera ◽  
Daria C Zelasko-Leon ◽  
Phillip B Messersmith
Keyword(s):  
Cancer Cell ◽  
Surface Functionalization ◽  
Gold Nanorods ◽  
Photothermal Therapy ◽  
Targeted Imaging

Aggregation induced photoacoustic detection of mercury (Ⅱ) ions using quaternary ammonium group-capped gold nanorods

Talanta ◽  
2018 ◽  
Vol 187 ◽  
pp. 65-72 ◽  
Author(s):  
Yan Huang ◽  
Fan Li ◽  
Gongcheng Ma ◽  
Wuwei Yang ◽  
Xiaofen Zhang ◽  
...  
Keyword(s):  
Gold Nanorods ◽  
Quaternary Ammonium ◽  
Photoacoustic Detection ◽  
Ammonium Group ◽  
Quaternary Ammonium Group

scholarly journals Development of amyloid beta gold nanorod aggregates as optoacoustic probes

2021 ◽  
Author(s):  
Mahmoud G Soliman ◽  
Hannah A Davies ◽  
Jack Sharkey ◽  
Raphaël Lévy ◽  
Jillian Madine
Keyword(s):  
Amyloid Beta ◽  
Surface Functionalization ◽  
Gold Nanorods ◽  
Neuroblastoma Cells ◽  
Potential Mechanism ◽  
Biophysical Properties ◽  
Optoacoustic Imaging ◽  
Optoacoustic Tomography ◽  
Vis Spectroscopy

Propagation of small amyloid beta (Aβ) aggregates (or seeds) has been suggested as a potential mechanism of Alzheimer’s disease progression. Monitoring the propagation of Aβ seeds in an organism would enable testing of this hypothesis and, if confirmed, provide mechanistic insights. This requires a contrast agent for long-term tracking of the seeds. Gold nanorods combine several attractive features for this challenging task, in particular, their strong absorbance in the infrared (enabling optoacoustic imaging) and the availability of several established protocols for surface functionalization. In this work, polymer-coated gold nanorods were conjugated with anti-Aβ antibodies and specifically attached to pre-formed Aβ seeds. The resulting complexes were characterized for their optical properties by UV/Vis spectroscopy and multispectral optoacoustic tomography. The complexes retained their biophysical properties, i.e. their ability to seed Aβ fibril formation. They remained stable in biological media for at least 2 days and showed no toxicity to SH-SY5Y neuroblastoma cells up to 1.5 nM and 6 µM of gold nanorods and Aβ seeds, respectively. Taken together, this study describes the first steps in the development of probes for monitoring the spread of Aβ seeds in animal models.

scholarly journals Mechanical properties of MDCK II cells exposed to gold nanorods

2015 ◽  
Vol 6 ◽  
pp. 223-231 ◽  
Author(s):  
Anna Pietuch ◽  
Bastian Rouven Brückner ◽  
David Schneider ◽  
Marco Tarantola ◽  
Christina Rosman ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Functionalization ◽  
Gold Nanorods ◽  
Cellular Response ◽  
Dark Field ◽  
Membrane Area ◽  
Gold Particles ◽  
Actin Cortex ◽  
External Stimuli ◽  
The Impact

Background: The impact of gold nanoparticles on cell viability has been extensively studied in the past. Size, shape and surface functionalization including opsonization of gold particles ranging from a few nanometers to hundreds of nanometers are among the most crucial parameters that have been focussed on. Cytoxicity of nanomaterial has been assessed by common cytotoxicity assays targeting enzymatic activity such as LDH, MTT and ECIS. So far, however, less attention has been paid to the mechanical parameters of cells exposed to gold particles, which is an important reporter on the cellular response to external stimuli. Results: Mechanical properties of confluent MDCK II cells exposed to gold nanorods as a function of surface functionalization and concentration have been explored by atomic force microscopy and quartz crystal microbalance measurements in combination with fluorescence and dark-field microscopy. Conclusion: We found that cells exposed to CTAB coated gold nanorods display a concentration-dependent stiffening that cannot be explained by the presence of CTAB alone. The stiffening results presumably from endocytosis of particles removing excess membrane area from the cell’s surface. Another aspect could be the collapse of the plasma membrane on the actin cortex. Particles coated with PEG do not show a significant change in elastic properties. This observation is consistent with QCM measurements that show a considerable drop in frequency upon administration of CTAB coated rods suggesting an increase in acoustic load corresponding to a larger stiffness (storage modulus).

Functionalization of two-dimensional 1T′-ReS2 with surface ligands for use as a photocatalyst in the hydrogen evolution reaction: a first-principles calculation study

2020 ◽  
Vol 22 (17) ◽  
pp. 9415-9423
Author(s):  
Jing Pan ◽  
Wannian Zhang ◽  
Xiaoyong Xu ◽  
Jingguo Hu
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Surface Functionalization ◽  
First Principles ◽  
First Principles Calculation ◽  
Two Dimensional ◽  
Surface Ligands

Surface functionalization with polar ligands to tune band edges of two-dimensional 1T′-ReS2 and enhance its photocatalytic activity for hydrogen production.

Highly hydrophilic cationic gold nanorods stabilized by novel quaternary ammonium surfactant with negligible cytotoxicity

2019 ◽  
Vol 12 (12) ◽  
Author(s):  
Sarka Salajkova ◽  
Michal Sramek ◽  
David Malinak ◽  
Filip Havel ◽  
Kamil Musilek ◽  
...  
Keyword(s):  
Gold Nanorods ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Surfactant ◽  
Cationic Gold
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