Adsorption of ozone and plasmonic properties of gold hydrosol: the effect of the nanoparticle size

2015 ◽  
Vol 17 (28) ◽  
pp. 18431-18436 ◽  
Author(s):  
Boris G. Ershov ◽  
Evgeny V. Abkhalimov ◽  
Vyacheslav I. Roldughin ◽  
Viktor M. Rudoy ◽  
Olga V. Dement'eva ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Plasmon Resonance ◽  
Bathochromic Shift ◽  
Resonance Peak ◽  
Nanoparticle Size ◽  
Plasmon Resonance Peak ◽  
The Impact

The impact of the size of gold nanoparticles on the magnitude of the bathochromic shift of their plasmon resonance peak upon ozone adsorption is revealed and analyzed.

RESEARCH ON OPTICAL ABSORPTION CHARACTERISTICS OF Ag NANOPARTICLES

2013 ◽  
Vol 27 (11) ◽  
pp. 1350079 ◽  
Author(s):  
FENGXIANG CHEN ◽  
WENYING XU ◽  
LISHENG WANG
Keyword(s):  
Plasmon Resonance ◽  
Ag Nanoparticles ◽  
Mie Scattering ◽  
Resonance Peak ◽  
Experimental Results ◽  
Ag Nanoparticle ◽  
Plasmon Resonance Peak ◽  
Glass Substrates ◽  
Nanoparticle Surface ◽  
Peak Location

In this work, Ag nanoparticles were deposited on quartz glass substrates by magnetron sputtering method, and the morphology was characterized by SEM. Ag nanoparticle surface plasmon resonance characteristics were observed by transmittance measurement. The experimental results demonstrated an increase in particle size that was correlated to an increase in sputtering time and a plasmon resonance absorption peak redshift. This phenomenon was partially explained by Mie scattering model. The differences between our theoretical analysis and experimental results show that both the shape of and the spacing between nanoparticles are key parameters affecting plasmon resonance peak location.

Facile Synthesis of Ag Nanorods with No Plasmon Resonance Peak in the Visible Region by Using Pd Decahedra of 16 nm in Size as Seeds

ACS Nano ◽  
2015 ◽  
Vol 9 (10) ◽  
pp. 10523-10532 ◽  
Author(s):  
Ming Luo ◽  
Hongwen Huang ◽  
Sang-Il Choi ◽  
Chao Zhang ◽  
Robson Rosa da Silva ◽  
...  
Keyword(s):  
Plasmon Resonance ◽  
Visible Region ◽  
Resonance Peak ◽  
Facile Synthesis ◽  
Plasmon Resonance Peak

scholarly journals Synthesis of gold nanorods with a longitudinal surface plasmon resonance peak of around 1250 nm

2016 ◽  
Vol 7 (1) ◽  
pp. 015006 ◽  
Author(s):  
Thi Nhat Hang Nguyen ◽  
Thi Le Trinh Nguyen ◽  
Thi Thanh Tuyen Luong ◽  
Canh Minh Thang Nguyen ◽  
Thi Phuong Phong Nguyen
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Gold Nanorods ◽  
Plasmon Resonance ◽  
Resonance Peak ◽  
Surface Plasmon Resonance Peak ◽  
Plasmon Resonance Peak

scholarly journals Seed-Mediated Growth of Gold Nanorods Using Silver Seeds: Effect of Silver Seeds Concentration and Growth Time

2018 ◽  
Vol 7 (4.30) ◽  
pp. 121 ◽  
Author(s):  
Suratun Nafisah ◽  
Marlia Morsin ◽  
Nur Anida Jumadi ◽  
Nafarizal Nayan ◽  
Nur Zehan An’nisa Md Shah ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanorods ◽  
Plasmon Resonance ◽  
Colloidal Gold ◽  
Average Length ◽  
New Method ◽  
Growth Time ◽  
Plasmon Resonance Peak ◽  
Resonance Band ◽  
Seed Mediated

Seed-mediated growth method (SMGM) in preparation of gold nanoparticles becomes one of the most popular methods due to the simplicity of the experimental procedures and flexibility in structural modifications. In this paper, we report a new method for synthesizing gold nanoparticles using silver seeds. The effect of seed concentration and growth time are investigated in this work. By increasing the silver seed concentration, it is found that the color of the colloidal gold nanorods obtained are changed from light pink to reddish purple, the surface plasmon resonance band is shifted to the blue region whereas absorption spectra becomes narrower. The additional peak is also spotted when increasing silver seed concentration to 5 µl. Meanwhile, increasing the growth time from 5 to 240 minutes tends to increase the color concentration of the solution. Besides that, the absorbance of colloidal gold nanorods is also increased with an increase in the growth time whereas optimum growth time is found to be 45 minutes. FESEM characterization shows that gold nanoparticles shapes are dominated by nanorods with average length, width, and aspect ratio are 129.8 nm, 42.9 nm, and 3.4, respectively. The energy-dispersive x-ray spectroscopy (EDX) shows the chemical composition of the synthesized sample is Gold (Au) with weight % and atomic % are 32.23 and 5.98, respectively. Besides that, signals from Carbon (C), Oxygen (O), and Indium (In) atoms were also recorded from EDS spectra. The present approach thus provides new method for synthesis gold nanoparticles with additional plasmon resonance peak thus it has very potential for application in plasmonic sensing.

scholarly journals Quantification of the PEGylated Gold Nanoparticles Protein Corona. Influence on Nanoparticle Size and Surface Chemistry

2019 ◽  
Vol 9 (22) ◽  
pp. 4789
Author(s):  
Raul Nicoară ◽  
Maria Ilieș ◽  
Alina Uifălean ◽  
Cristina Adela Iuga ◽  
Felicia Loghin
Keyword(s):  
Gold Nanoparticles ◽  
Surface Chemistry ◽  
Protein Corona ◽  
Nanoparticle Size ◽  
Full Picture ◽  
Model Protein ◽  
Modified Surface ◽  
Living Organisms ◽  
The Impact ◽  
Biological Milieu

The interactions of nanoparticles with living organisms are driven by an interface called the protein corona. This interface is formed when nanoparticles are introduced in biological milieu and proteins are adsorbed at nanoparticles’ surfaces. Understanding the factors that are responsible for the formation and the composition of the protein corona could reveal mechanistic insights that are involved in the interaction of nanoparticles with biological structures. Multiple studies have qualitatively described the protein corona, but just a few have proposed quantification methods, especially for gold nanoparticles. Using bovine serum albumin conjugated with fluorescein-5-isothiocyanate as a model protein, we developed a fluorescent-based quantification method for gold nanoparticles’ protein coronas. The impact of nanoparticle size and surface chemistry was studied, and our research emphasizes that size and surface chemistry are determinant factors: Bigger nanoparticles and amino-modified surface chemistry are responsible for higher protein adsorption compared to smaller ones and carboxyl- or methoxy-modified surface chemistry. The proposed method can be used to complete the full picture of the interactions of nanoparticles with biological milieu and to describe the parameters which govern these interactions for the better development of nanomedicines.

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