Multicolor ELISA based on alkaline phosphatase-triggered growth of Au nanorods

The Analyst ◽  
2016 ◽  
Vol 141 (10) ◽  
pp. 2970-2976 ◽  
Author(s):  
Yanyan Li ◽  
Xiaoming Ma ◽  
Zhengming Xu ◽  
Meihua Liu ◽  
Zhenyu Lin ◽  
...  
Keyword(s):  
Alkaline Phosphatase ◽  
Gold Nanorods ◽  
Au Nanorods ◽  
Seed Mediated ◽  
First Time

In this work, seed-mediated synthesis of gold nanorods (AuNRs) is demonstrated for multicolor biosensing for the first time.

Removal of Cetyltrimethylammonium Bromide to Enhance the Biocompatibility of Au Nanorods Synthesized by a Modified Seed Mediated Growth Process

2008 ◽  
Vol 8 (9) ◽  
pp. 4670-4674 ◽  
Author(s):  
Byung-Sang Choi ◽  
Muhammad Iqbal ◽  
Takhee Lee ◽  
Young Ha Kim ◽  
Giyoong Tae
Keyword(s):  
Gold Nanorods ◽  
Cetyltrimethylammonium Bromide ◽  
Growth Process ◽  
Complete Removal ◽  
Au Nanorods ◽  
Nir Absorption ◽  
Seed Mediated ◽  
The Stability ◽  
Growth Approach

Previously, we reported the synthesis of stable gold nanorods with higher aspect ratio (∼15–20) and more enhanced uniformity by a modified seed mediated growth approach using a binary surfactant system consisting of CTAB and Pluronic F-127. For the in vivo application of gold nanorods, the removal of CTABs that are strongly bound on prepared Au nanorods is necessary due to their cytotoxicity. Use of heat or acid at various conditions was performed to achieve the complete removal of CTAB from the synthesized Au nanorods while maintaining their stability. Here, we report the appropriate conditions for both treatments that can remove CTAB efficiently without hampering the stability of Au nanorods. After the removal of CTAB, Pluronic F-127 was added additionally for the stabilization and further potential functionalization of Au nanorods to make useful for various applications. VIS-NIR absorption spectroscopy, SEM, TEM, and FTIR were used for characterization.

Nanomanipulation, nanotribology and nanomechanics of Au nanorods in dry and liquid environments using an AFM and depth sensing nanoindenter

Nanoscale ◽  
2014 ◽  
Vol 6 (11) ◽  
pp. 5838-5852 ◽  
Author(s):  
Dave Maharaj ◽  
Bharat Bhushan
Keyword(s):  
Gold Nanorods ◽  
Friction And Wear ◽  
Depth Sensing ◽  
Au Nanorods ◽  
Dry Conditions ◽  
First Time

The effects of gold nanorods on friction and wear in dry conditions and submerged in water were studied using an AFM for the first time.

Effect of aspect ratio on the chirality of gold nanorods prepared through conventional seed-mediated growth method

2021 ◽  
Vol 1152 ◽  
pp. 338277
Author(s):  
Xiaojuan Zhou ◽  
Qiang Liu ◽  
Xiaoyu Shi ◽  
Chunli Xu ◽  
Baoxin Li
Keyword(s):  
Aspect Ratio ◽  
Gold Nanorods ◽  
Growth Method ◽  
Seed Mediated

scholarly journals Effective replacement of cetyltrimethylammonium bromide (CTAB) by mercaptoalkanoic acids on gold nanorod (AuNR) surfaces in aqueous solutions

Nanoscale ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 658-668 ◽  
Author(s):  
Rafael del Caño ◽  
Jose M. Gisbert-González ◽  
Jose González-Rodríguez ◽  
Guadalupe Sánchez-Obrero ◽  
Rafael Madueño ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Gold Nanorods ◽  
Ligand Exchange ◽  
Cetyltrimethylammonium Bromide ◽  
Gold Nanorod ◽  
Experimental Conditions ◽  
Seed Mediated ◽  
The Stability

The highly packed cetyltrimethylammonium bromide bilayer on the surface of gold nanorods synthesized by the seed-mediated procedure hampers the complete ligand exchange under experimental conditions that preserves the stability of the dispersions.

scholarly journals Constraining the conformation of peptides with Au nanorods to construct multifunctional therapeutic agents with targeting, imaging, and photothermal abilities

RSC Advances ◽  
2018 ◽  
Vol 8 (47) ◽  
pp. 26517-26522
Author(s):  
Linlin Xie ◽  
Xiaomin Zhi ◽  
Nao Xiao ◽  
Chen-Jie Fang ◽  
Chun-Hua Yan
Keyword(s):  
Aspartic Acid ◽  
Gold Nanorods ◽  
Therapeutic Agents ◽  
Au Nanorods ◽  
Arginine Glycine Aspartic Acid

We demonstrated an easy-to-use strategy to constrain the freedom of an RGD (arginine, glycine, aspartic acid) sequence with gold nanorods.

scholarly journals Seed Mediated Synthesis of Colloidal Halide Perovskite Nanoplatelets

2021 ◽  
Author(s):  
C. Meric Guvenc ◽  
sinan balci
Keyword(s):  
Optical Properties ◽  
Halide Salt ◽  
Seed Solution ◽  
Synthesis Route ◽  
Line Widths ◽  
Halide Perovskite ◽  
Seed Mediated ◽  
A Site ◽  
First Time ◽  
Lead Halide

<p><b>Two-dimensional lead halide perovskite nanoplatelets (2D LHP NPLs) have been emerging as one of the most promising semiconductor nanomaterials due to their narrow absorption and emission line widths, tunable bandgaps, high exciton binding energies, high defect tolerance as well as highly localized energy states. Colloidal synthesis of 2D LHP NPLs is generally performed using hot-injection or ligand assisted precipitation techniques (LARP). In the LARP method, perovskites are synthesized in polar solvents, which decrease the stability of the 2D LHP NPLs due to their weakly bonded nature. In fact, the presence of residual polar solvent in the LHP NPL colloid can cause deterioration of thickness uniformity, degradation of NPLs to parent precursors, and undesired phase transformations. Herein, for the first time, we report facile seed-mediated synthesis route of monolayer, 2-monolayers, and thicker lead halide perovskite nanoplatelets without using A site cation halide salt (AX</b><b>;</b><b> A = Cesium, methylammonium, formamidinium and, X = Cl, Br, I) and long chain alkylammonium halide salts (LX; L = oleylammonium, octylammonium, butylammonium and, X = Cl, Br, I). The seed solution has been synthesized by reacting lead (II) halide salt and coordinating ligands (oleylamine or octylamine and oleic acid) in nonpolar high boiling solvent (1-octadecene). The seed mediated synthesis has been carried out in hexane by reacting seed solution with A-site cation precursors (Cs-oleate, FA-oleate, or diluted MA solution in hexane) under ambient conditions. More importantly, the seed mediated growth of NPLs has been tracked for the first time by performing in-situ optical measurements. Furthermore, the optical properties and morphologies of the seeds have been extensively studied. We find that our facile synthesis route provides highly stable, monodisperse NPLs with narrow absorption, and photoluminescence line widths (68-201 meV), and high PLQY (37.6-1.66% for 2ML NPLs). Furthermore, anion exchange reactions have been performed by mixing pre-synthesized LHP NPLs with counter halide seeds. The optical properties of NPLs have been affectively tuned by postsynthetic chemical reactions without changing the thickness of the NPLs. We anticipate that our new synthetic route provides further understanding of growth dynamics of LHP NPLs.</b></p>

Green/red pulsed vortex-beam oscillations in all-fiber lasers with visible-resonance gold nanorods

Nanoscale ◽  
2019 ◽  
Vol 11 (34) ◽  
pp. 15991-16000 ◽  
Author(s):  
Jinhai Zou ◽  
Zhe Kang ◽  
Rui Wang ◽  
Hongjian Wang ◽  
Jiaxing Liu ◽  
...  
Keyword(s):  
Solid State ◽  
Gold Nanorods ◽  
Fiber Lasers ◽  
Vortex Beam ◽  
Sted Microscopy ◽  
Visible Wavelength ◽  
Mode Division Multiplexing ◽  
First Time

We demonstrate visible-wavelength all-fiber pulsed vortex lasers for the first time that may serve as attractive alternatives to solid-state vortex lasers for a variety of applications, such as visible mode-division multiplexing and STED microscopy.

scholarly journals Plasmonic photothermal microneedle arrays and single needles for minimally-invasive deep in-skin hyperthermia

2020 ◽  
Vol 8 (25) ◽  
pp. 5425-5433 ◽  
Author(s):  
Álvaro Cárcamo-Martínez ◽  
Brónach Mallon ◽  
Juan Domínguez-Robles ◽  
A. Sara Cordeiro ◽  
Maurizio Celentano ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Laser Irradiation ◽  
Gold Nanorods ◽  
Near Infrared ◽  
Skin Model ◽  
Thickness Skin ◽  
Microneedle Arrays ◽  
First Time ◽  
Nir Laser ◽  
Deep Hyperthermia

We report, for the first time, crosslinked polymeric microneedle (MN) arrays and single needles (2 mm and 4.5 mm length) coated with gold nanorods (GnRs) to induce deep hyperthermia in a 3 mm-thickness skin model upon near infrared (NIR) laser irradiation.

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