Kinetics and Mechanism of Single-Stranded DNA Adsorption onto Citrate-Stabilized Gold Nanoparticles in Colloidal Solution

Langmuir ◽  
2011 ◽  
Vol 27 (5) ◽  
pp. 1770-1777 ◽  
Author(s):  
Edward M. Nelson ◽  
Lewis J. Rothberg
Keyword(s):  
Gold Nanoparticles ◽  
Colloidal Solution ◽  
Kinetics And Mechanism ◽  
Dna Adsorption ◽  
Single Stranded Dna

Photothermal Release of Single-Stranded DNA from the Surface of Gold Nanoparticles Through Controlled Denaturating and Au−S Bond Breaking

ACS Nano ◽  
2010 ◽  
Vol 4 (11) ◽  
pp. 6395-6403 ◽  
Author(s):  
Lester Poon ◽  
Wesley Zandberg ◽  
Dennis Hsiao ◽  
Zach Erno ◽  
Dipankar Sen ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Bond Breaking ◽  
Single Stranded Dna

Localized Surface Plasmon Resonance Effect of Gold Nanoparticles Using 3-Mercaptopropionic Acid as Capping Material for Sensing Probe

2021 ◽  
Vol 891 ◽  
pp. 43-48
Author(s):  
Muhammad Tegar Pambudi ◽  
Suhandoko Dwi Isro ◽  
Priastuti Wulandari
Keyword(s):  
Gold Nanoparticles ◽  
Surface Plasmon Resonance ◽  
Ligand Exchange ◽  
Localized Surface Plasmon Resonance ◽  
Reduction Method ◽  
Colloidal Solution ◽  
Localized Surface Plasmon ◽  
Exchange Method ◽  
Vibrational Peak ◽  
Absorbance Spectra

Gold nanoparticles (AuNP) has been used in a wide range of applications especially in medicine and optoelectronic applications due to its localized surface plasmon resonance (LSPR) effect. LSPR observation of AuNP solution shows that the plasmonic peak in the absorbance spectra lies in the range of visible light around 520 nm with deep red-wine color. The optical characteristic is controlled by the size and shape of the nanoparticles including its surface functionalization. Our research is focused on the adsorption study of 3-mercaptopropionate (3-MP) on AuNP (AuMP) surface synthesized by ligand exchange method and also by direct reduction method. The characterizations are conducted by use of UV-vis and FTIR spectroscopies in order to investigate the effect of LSPR. The absorbance spectra show that both experimental methods of AuMP give a similar profile of red-shifted in the plasmonic peaks in comparison to that of citrate-capped AuNP as a reference from 519 nm to 520 nm. The ligand exchange method of AuMP synthesis results in an unstable colloidal solution after being stored for a week at room temperature while the reduction method results in a stable colloidal solution of AuMP even though it has been stored for 2 months. The FTIR spectra show the difference in vibrational peak intensities between the 3-MP on AuNP and the 3-MPA as reference. The peak of carboxylate (COO-) asymmetric stretching is shifted to low frequency from 1708 cm-1 to 1632 cm-1 indicate the effect of LSPR while the shift to high frequencies for some vibrational peak intensities relates to the strong effect of chemical coordination between gold and capping material. The simulation of the vibration energy by use of the Density Functional Theory (DFT) method shows a similar tendency to that of the peak intensities along the infrared spectrum from experimental results.

scholarly journals Application of gold nanoparticles in the methods of optical molecular absorption spectroscopy: main effecting factors

2020 ◽  
Vol 92 (7) ◽  
pp. 1135-1145
Author(s):  
Vladimir V. Apyari ◽  
Viktoria V. Arkhipova ◽  
Maria V. Gorbunova ◽  
Andrey I. Isachenko ◽  
Pavel A. Volkov ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Organic Compounds ◽  
Absorption Spectroscopy ◽  
Colloidal Solution ◽  
Silver Coating ◽  
Molecular Absorption ◽  
Color Changes ◽  
Cationic Compounds ◽  
Molecular Absorption Spectroscopy

AbstractResults of studies on the analytical capabilities of gold nanoparticles in the methods of optical molecular absorption spectroscopy are reported. Peculiar effects of the nature of nanoparticle stabilizer, its charge, morphology of nanoparticles, form in which they are present in the system (in a colloidal solution or as a part of a nanocomposite with polyurethane foam) upon the determination of organic compounds (thiols, cationic compounds, catecholamines) and inorganic anions are considered. The determination is based on aggregation of nanoparticles or change in the state of their surface and morphology as a result of silver coating, leading to significant spectral and color changes, which can be monitored both by optical molecular absorption spectroscopy and visually. The ways to increase sensitivity and to control selectivity of the analysis using gold nanoparticles and their nanocomposites are outlined.

Spectroscopic and microscopic analyses of rod‐shaped gold nanoparticles interacting with single‐stranded DNA oligonucleotides

2013 ◽  
Vol 7 (2) ◽  
pp. 42-49 ◽  
Author(s):  
Reza Saber ◽  
Zahra Shakoori ◽  
Saeed Sarkar ◽  
Gholamreza Tavoosidana ◽  
Sharmin Kharrazi ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Single Stranded Dna ◽  
Dna Oligonucleotides

Sequence-specific recognition of single-stranded DNA using atomic absorption spectrometry

2014 ◽  
Vol 29 (9) ◽  
pp. 1591-1597 ◽  
Author(s):  
Hong Zhang ◽  
Zhifang Zhu ◽  
Zunxiang Zeng ◽  
Liansheng Ling
Keyword(s):  
Gold Nanoparticles ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Absorption Spectrometry ◽  
Single Stranded Dna ◽  
Coated Glass ◽  
Specific Recognition

A technique for the sequence-specific recognition of single-stranded DNA using gold nanoparticles and silver-coated glass modified with oligonucleotides was developed, with determination by atomic absorption spectrometry.

Characterization of Gold Nanoparticles Modified with Single-Stranded DNA Using Analytical Ultracentrifugation and Dynamic Light Scattering

Langmuir ◽  
2010 ◽  
Vol 26 (15) ◽  
pp. 12740-12747 ◽  
Author(s):  
James B. Falabella ◽  
Tae Joon Cho ◽  
Dean C. Ripple ◽  
Vincent A. Hackley ◽  
Michael J. Tarlov
Keyword(s):  
Gold Nanoparticles ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Analytical Ultracentrifugation ◽  
Single Stranded Dna

Experimental Evidence of Single-Stranded DNA Adsorption on Multiwalled Carbon Nanotubes

2020 ◽  
Vol 124 (12) ◽  
pp. 2514-2525
Author(s):  
Franco Tardani ◽  
Stefano Sarti ◽  
Simona Sennato ◽  
Manuela Leo ◽  
Patrizia Filetici ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Experimental Evidence ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon ◽  
Dna Adsorption ◽  
Single Stranded Dna

Preparation of sterically stabilized gold nanoparticles for plasmonic applications

2013 ◽  
Vol 67 (9) ◽  
Author(s):  
Monika Benkovičová ◽  
Karol Végsö ◽  
Peter Šiffalovič ◽  
Matej Jergel ◽  
Eva Majková ◽  
...  
Keyword(s):  
Thin Film ◽  
Gold Nanoparticles ◽  
Solar Cells ◽  
Small Angle ◽  
Colloidal Solution ◽  
Thin Film Solar Cells ◽  
X Ray ◽  
X Ray Scattering ◽  
Self Assembled ◽  
Ray Scattering

AbstractPlasmonic nanoparticles such as those of gold or silver have been recently investigated as a possible way to improve light absorption in thin film solar cells. Here, a simple method for the preparation of spherical plasmonic gold nanoparticles in the form of a colloidal solution is presented. The nanoparticle diameter is controlled in the range from several nm to tens of nm depending on the synthesis parameters with the size dispersion down to 14 %. The synthesis is based on thermal decomposition and reduction of the chloroauric acid in the presence of a stabilizing capping agent (surfactant) that is very slowly injected into the hot solvent. The surfactant prevents uncontrolled nanoparticle aggregation during the growth process. The nanoparticle size and shape depend on the type of the stabilizing agent. Surfactants with different lengths of the hydrocarbon chains such as Z-octa-9-decenylamine (oleylamine) with AgNO3 and polyvinylpyrrolidone with AgNO3 were used for the steric stabilization. Hydrodynamic diameter of the gold nanoparticles in the colloidal solution was determined by dynamic light scattering while the size of the nanoparticle metallic core was found by small-angle X-ray scattering. The UV-VIS-NIR spectrophotometer measurements revealed a plasmon resonance absorption in the 500–600 nm range. Self-assembled nanoparticle arrays on a silicon substrate were prepared by drop casting followed by spontaneous evaporation of the solvent and by a modified Langmuir-Blodgett deposition. The degree of perfection of the self-assembled arrays was analyzed by scanning electron microscopy and grazing-incidence small-angle X-ray scattering. Homogeneous close-packed hexagonal ordering of the nanoparticles stretching over large areas was evidenced. These results document the viability of the proposed nanoparticle synthesis for the preparation of high-quality plasmonic templates for thin film solar cells with enhanced power conversion efficiency, surface enhanced Raman scattering, and other applications.

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