Self-assembly and characterization of transferrin–gold nanoconstructs and their interaction with bio-interfaces

Nanoscale ◽  
2015 ◽  
Vol 7 (17) ◽  
pp. 8062-8070 ◽  
Author(s):  
Birgitte H. McDonagh ◽  
Sondre Volden ◽  
Sina M. Lystvet ◽  
Gurvinder Singh ◽  
Marit-Helen G. Ese ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Self Assembly ◽  
Specific Receptor ◽  
Receptor Targeting ◽  
Site Specific

Transferrin (Tf) conjugated to gold nanoparticles and clusters combine the protein's site-specific receptor targeting capabilities with the optical properties imparted by the nano-sized gold.

Self-assembly of gold nanoparticles into chain-like structures and their optical properties

2011 ◽  
Vol 13 (9) ◽  
pp. 3923-3928 ◽  
Author(s):  
Dong-Feng Zhang ◽  
Qian Zhang ◽  
Li-Ya Niu ◽  
Li Jiang ◽  
Peng-Gang Yin ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Self Assembly

Assembly and Optical Properties of Metal Nanoparticles

2019 ◽  
Vol 294 ◽  
pp. 3-10
Author(s):  
E.A. Dawi ◽  
A. Abdelkader
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Self Assembly ◽  
Silicon Oxide ◽  
Ex Situ ◽  
Visible Range ◽  
Plasmonic Nanostructures ◽  
Electromagnetic Spectrum ◽  
Force Microscopy ◽  
Atomic Force

In this paper, the deposition and optical properties of charge-stabilized gold nanoparticles on silicon oxide substrates is studied, which have been derivatised with (aminopropyl) triemethoxysilane. Monodispersed charged-stabilized colloidal gold nanoparticles with diameters between 20-150 nm were prepared and their self-assembly and optical properties on silica substrates is studied. Atomic force microscopy (AFM) is employed to investigate the nanoparticle monolayers ex situ. Analysis of AFM images provide evidence that the formation of the colloidal nanoparticle monolayers is governed by random sequential adsorption. The results indicate that the ionic strength of the suspension influences the spatial distribution of the nanoparticles. For all sizes of the Au nanoparticles tested, optical simulations of extinction coefficients made by finite-difference time domain (FDTD) indicate a resonance peak in the range of 510-600 nm wavelength of the visible range of the electromagnetic spectrum. The results indicate a simple and inexpensive approach of assembly of plasmonic nanostructures that can find applications in metamaterials and light waveguides.

scholarly journals Colorimetric Analysis on Flocculation of Bioinspired Au Self-Assembly for Biophotonic Application

2009 ◽  
Vol 2009 ◽  
pp. 1-6 ◽  
Author(s):  
Wan-Joong Kim ◽  
JaeTae Seo ◽  
Chil Seong Ah ◽  
Jasmine Austin ◽  
Shanghee Kim ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Absorption Spectra ◽  
Surface Plasmon ◽  
Self Assembly ◽  
Colorimetric Analysis ◽  
Physical Origin ◽  
Plasmon Absorption ◽  
Collisional Damping ◽  
Strong Surface

Gold nanoparticles exhibited strong surface plasmon absorption and couplings between neighboring particles within bioactivated self-assembly modified their optical properties. Colorimetric analysis on the optical modification of surface plasmon resoanance (SPR) shift and flocculation parameter functionalized bioinspired gold assembly for biophotonic application. The physical origin of bioinspired gold aggregation-induced shifting, decreasing, or broadening of the plasmon absorption spectra could be explained in terms of dynamic depolarization, collisional damping, and shadowing effects.

Environmentally benign bio-inspired synthesis of Au nanoparticles, their self-assembly and agglomeration

RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 42081-42087 ◽  
Author(s):  
Ramesh Raliya ◽  
Pratim Biswas
Keyword(s):  
Gold Nanoparticles ◽  
Solanum Lycopersicum ◽  
Self Assembly ◽  
Soluble Protein ◽  
Au Nanoparticles ◽  
Environmentally Benign ◽  
Synthesis And Characterization ◽  
Gold Chloride ◽  
Au Nps

The synthesis and characterization of stable gold nanoparticles (Au NPs) from gold chloride in soluble protein extracts of tomato (Solanum lycopersicum L.) leaves is demonstrated.

Controlling the self-assembly and optical properties of gold nanoclusters and gold nanoparticles biomineralized with bovine serum albumin

RSC Advances ◽  
2015 ◽  
Vol 5 (122) ◽  
pp. 101101-101109 ◽  
Author(s):  
Birgitte H. McDonagh ◽  
Gurvinder Singh ◽  
Sulalit Bandyopadhyay ◽  
Sina M. Lystvet ◽  
Joseph A. Ryan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Bovine Serum Albumin ◽  
Growth Mechanism ◽  
Self Assembly ◽  
Gold Nanoclusters ◽  
The Self ◽  
Time Dependent ◽  
Size Dependent ◽  
Dependent Growth

While the size-dependent optical properties of BSA-stabilized gold nanoclusters are well known, the time-dependent growth mechanism remains to be described.

scholarly journals DNA-mediated self-assembly of gold nanoparticles on protein superhelix

2018 ◽  
Author(s):  
Tao Zhang ◽  
Ingemar André
Keyword(s):  
Gold Nanoparticles ◽  
Self Assembly ◽  
De Novo ◽  
Specific Binding ◽  
Protein Structures ◽  
Spatial Arrangement ◽  
Inorganic Nanoparticles ◽  
Covalent Attachment ◽  
Site Specific ◽  
Conjugation Method

AbstractRecent advances in protein engineering have enabled methods to control the self-assembly of protein on various length-scales. One attractive application for designed proteins is to direct the spatial arrangement of nanomaterials of interest. Until now, however, a reliable conjugation method is missing to facilitate site-specific positioning. In particular, bare inorganic nanoparticles tend to aggregate in the presence of buffer conditions that are often required for the formation of stable proteins. Here, we demonstrated a DNA mediated conjugation method to link gold nanoparticles with protein structures. To achieve this, we constructed de novo designed protein fibers based on previously published uniform alpha-helical units. DNA modification rendered gold nanoparticles with increased stability against ionic solutions and the use of complementary strands hybridization guaranteed the site-specific binding to the protein. The combination of high resolution placement of anchor points in designed protein assemblies with the increased control of covalent attachment through DNA binding can enable investigations of multilevel physical coupling events of nanocomponents on protein templates and expand the application of protein structures to material sciences.

Fabrication and Characterization of Chain-like Arrangement of Gold Nanoparticles using Nanotemplates

2015 ◽  
Vol 135 (11) ◽  
pp. 474-475
Author(s):  
Koji Sugano ◽  
Ryoji Hiraoka ◽  
Toshiyuki Tsuchiya ◽  
Osamu Tabata
Keyword(s):  
Gold Nanoparticles ◽  
Fabrication And Characterization
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