Monitoring self-assembly processes by characterizing optical properties of gold nanoparticles

2005 ◽  
Author(s):  
S.Y. Chuanz ◽  
K.L. Chen ◽  
K.C. Cheng ◽  
C.Y. Wang ◽  
T.C. Chu
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Self Assembly

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.

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.

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.

Self-Assembly Optical Components

2003 ◽  
Vol 771 ◽  
Author(s):  
Pavel I. Lazarev ◽  
Michael V. Paukshto ◽  
Elena N. Sidorenko
Keyword(s):  
Optical Properties ◽  
Self Assembly ◽  
Crystalline State ◽  
Liquid Crystalline ◽  
Film Deposition ◽  
X Ray Diffraction ◽  
Optical Components ◽  
Crystal Film ◽  
Solid Film ◽  
Thin Crystal

AbstractWe report a new method of Thin Crystal Film deposition. In the present paper we describe the method of crystallization, structure, and optical properties of Bisbenzimidazo[2,1-a:1',2',b']anthra[2,1,9-def:6,5,10-d'e'f']-diisoquinoline-6,9-dion (mixture with cis-isomer) (abbreviated DBI PTCA) sulfonation product. The Thin Crystal Film has a thickness of 200-1000 nm, with anisotropic optical properties such as refraction and absorption indices. X-ray diffraction data evidences a lyotropic liquid crystalline state in liquid phase and crystalline state in solid film. Anisotropic optical properties of the film make it useful in optical devices, e.g. liquid crystal displays.

Fluorescence biosensor for Salmonella typhimurium detection in food based on nano-self-assembly of alendronic acid modified upconversion and gold nanoparticles

2021 ◽  
Author(s):  
Min Chen ◽  
Leiqing Pan ◽  
K. Tu
Keyword(s):  
Gold Nanoparticles ◽  
Salmonella Typhimurium ◽  
Gold Nanoparticle ◽  
Alendronic Acid ◽  
Self Assembly ◽  
Upconversion Nanoparticles ◽  
Fluorescent Biosensor ◽  
Fluorescence Biosensor

A simple and quick responsive fluorescent biosensor for Salmonella typhimurium detection based on the recognition of aptamer coupled with alendronic acid (ADA)@upconversion nanoparticles (UCNPs) and gold nanoparticle (AuNPs) has been...

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