Effect of adsorption kinetics on dissociation of DNA-nucleobases on gold nanoparticles under pulsed laser illumination

2017 ◽  
Vol 19 (17) ◽  
pp. 10796-10803 ◽  
Author(s):  
Robin Schürmann ◽  
Ilko Bald
Keyword(s):  
Gold Nanoparticles ◽  
Adsorption Kinetics ◽  
Photothermal Therapy ◽  
Pulsed Laser ◽  
Kinetics Of Adsorption ◽  
Laser Illumination ◽  
Dna Nucleobases ◽  
Kinetics Of

The kinetics of adsorption and photofragmentation of DNA nucleobase analogues on gold nanoparticles is evaluated towards an improvement of cancer photothermal therapy.

scholarly journals KINETIC STUDY ON ADSORPTION OF CHROMIUM(lIl) TO DIATOMACEOUS EARTH PRE-TREATED WITH SULFURIC AND HYDROCHLORIC ACIDS

2010 ◽  
Vol 3 (1) ◽  
pp. 32-38
Author(s):  
Nuryono Nuryono ◽  
V.V.H. Susanti ◽  
Narsito Narsito
Keyword(s):  
Rate Constant ◽  
Adsorption Kinetics ◽  
Diatomaceous Earth ◽  
Atomic Absorption Spectrophotometry ◽  
Adsorption Rate ◽  
Physical Interaction ◽  
Kinetics Of Adsorption ◽  
Pre Treatment ◽  
Sulfuric And Hydrochloric Acids ◽  
Kinetics Of

In this research, the effect of Sangiran diatomaceous earth pre-treatment with sulfuric acid (H2SO4) and hydrochloric acid (HCl) on the kinetics of adsorption for Cr(III) in aqueous solution has been studied. The research has been carried out by mixing an amount of diatomeaeous earth with HCl or H2SO4 in various concentrations for two hours at temperature of 150 - 200°C. The mixture was washed with water until neutral, and the residue was dried at 70°C for four hours. The result then was used as adsorbent. Adsorption was carried out by mixing an amount of adsorbent with Cr(III) solution in various contact times. Ion adsorbed was determined by analyzing filtrate using atomic absorption spectrophotometry. The effect of pre-treatment on adsorption kinetics was evaluated based on kinetic parameters, i.e. constant of adsorption rate by using Langmuir-Hinshelwood kinetics and using two-process kinetics (fast and slow processes). Adsorption kinetics calculated using LH equation gave negative value for adsorption rate constant of zero order (k0). On the other words, the LH kinetics might not be applied for adsorption of Cr(III) to diatomaceous earth adsorbent. Results of kinetics study approached using two processes (fast and slow) showed that adsorption of Cr(III) occurred in two processes with rate constant of fast adsorption, kc, 0.041/min, rate constant of slow adsorption, kl, 0.0089/min, and of slow desorption, k'l, 0.089/menit. Pre-treatment with HCl up to 10 M decreased either kc, kl or k'l, while pre-treatment with H2SO4 1M increased kc to 0.061/min, decreased kl to 0.00424 and k'l to 0.0139/min. On pre-treatment with H2SO4 higher than 6 M significantly decreased three constants above. Based on the Gibbs energy change (4.31 - 6.79 kJ/mole) showed that adsorption involved physical interaction.   Keywords: adsorption, chromium, diatomaceous earth, kinetics, Langmuir-Hinshelwood

A Progress in Gold Nanoparticles: Adsorption Behavior

2012 ◽  
Vol 557-559 ◽  
pp. 530-533
Author(s):  
Da Ming Ban ◽  
Ze Quan Liu ◽  
Yang Min
Keyword(s):  
Gold Nanoparticles ◽  
Adsorption Kinetics ◽  
Organic Molecules ◽  
Adsorption Behavior ◽  
Self Assembled Monolayers ◽  
Adsorption Characteristics ◽  
Semiconductor Crystals ◽  
Assembled Monolayers ◽  
Recent Developments ◽  
Kinetics Of

This perspective reviews recent developments in the adsorption behavior and the adsorption kinetics of gold nanoparticles(AuNPs),with emphasis on papers initiating the developments and with an eye to their consequences. The aspect adsorption behavior of organic molecules on AuNPs have included the adsorption pattern of thionine, 1,4-PDI , 4-Methoxypyr-idine, 1,2,3-triazole and SH-PEG5K and the influence of adsorption. The aspect adsorption characteristics of biomolecules on AuNPs have included the adsorption kinetics of single-stranded DNA and proteins on the AuNPs. The last key aspect adsorption AuNPs on self-assembled monolayers have included the adsorption kinetics of AuNPs on different SAMs and semiconductor crystals.

scholarly journals The Adsorption Kinetics of Biomolecules on to Pegylated Gold Nanoparticles

2019 ◽  
Vol 116 (3) ◽  
pp. 448a
Author(s):  
Yasiru R. Perera ◽  
Alex Hughes ◽  
Nicholas C. Fitzkee
Keyword(s):  
Gold Nanoparticles ◽  
Adsorption Kinetics ◽  
Kinetics Of

scholarly journals Kajian Model Interaksi pada Adsorpsi Logam Berat Kadmium (Cd2+) dengan Menggunakan Adsorben dari Pasir Hitam

2019 ◽  
Vol 8 (2) ◽  
pp. 79-84
Author(s):  
Bode Haryanto ◽  
Warren K Sinaga ◽  
Febri T Saragih
Keyword(s):  
Correlation Coefficient ◽  
Adsorption Kinetics ◽  
Batch Adsorption ◽  
Kinetics Of Adsorption ◽  
Black Sand ◽  
Kinetics Modeling ◽  
Sand Surface ◽  
Percentage Concentration ◽  
Black Sands ◽  
Kinetics Of

This study aimed to analyze the adsorption ability of black sand in the metal ions adsorb cadmium (Cd2+) with a concentration of 70 ppm to a solution with a pH of 4,5. The black sand is used is 40 mesh. This research was conducted by batch adsorption system naturally and adsorption kinetics modeling. Kinetics of adsorption reached equilibrium at time t = 120 minutes with the percentage concentration of adsorbed Cd2+ 18,5%. In the adsorption kinetics modeling correlation coefficient is almost the same between the equations of first order and second order in the amount of 0.98 and 0.99. The result indicated that the type of interaction Cd2+ ions on the surface of black sands occur in chemistry and physics. The adsorption kinetics of diffusion modeling of internal and external diffusion of the correlation coefficient of 0,85 and 0,71. From this data it can be seen that in this study is modeling kinetic internal diffusion trend that shows adsorbent particles are inter sand surface area that experienced internal inter-particle pore diffusion.

scholarly journals Polymer ligand binding to surface-immobilized gold nanoparticles: A fluorescence-based study on the adsorption kinetics

Soft Matter ◽  
2021 ◽  
Author(s):  
Julian Sindram ◽  
Matthias Karg
Keyword(s):  
Gold Nanoparticles ◽  
Organic Solvent ◽  
Ligand Binding ◽  
Adsorption Kinetics ◽  
Binding Kinetics ◽  
Supported Gold Nanoparticles ◽  
Supported Gold ◽  
Kinetics Of ◽  
Polymer Ligand

We report on a simple, fluorescence-based method for the investigation of the binding kinetics of polystyrene ligands, dispersed in an organic solvent, to substrate supported gold nanoparticles. For this purpose,...

Adsorption kinetics of charged thiols on gold nanoparticles

2004 ◽  
Vol 6 (2) ◽  
pp. 424 ◽  
Author(s):  
Mart�n G. Bellino ◽  
Ernesto J. Calvo ◽  
Gabriel Gordillo
Keyword(s):  
Gold Nanoparticles ◽  
Adsorption Kinetics ◽  
Kinetics Of

Adsorption kinetics of alkanethiol-capped gold nanoparticles at the hexane–water interface

2011 ◽  
Vol 13 (12) ◽  
pp. 6579-6589 ◽  
Author(s):  
Sultana Ferdous ◽  
Marios A. Ioannidis ◽  
Dale Henneke
Keyword(s):  
Gold Nanoparticles ◽  
Adsorption Kinetics ◽  
Water Interface ◽  
Kinetics Of

Laser-driven phase transitions in aqueous colloidal gold nanoparticles under high pressure: picosecond pump–probe study

2016 ◽  
Vol 18 (6) ◽  
pp. 4994-5004 ◽  
Author(s):  
Shuichi Hashimoto ◽  
Tetsuro Katayama ◽  
Kenji Setoura ◽  
Michael Strasser ◽  
Takayuki Uwada ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
High Pressure ◽  
Phase Transitions ◽  
Pulsed Laser ◽  
Water Layer ◽  
Liquid Droplets ◽  
Pump Probe ◽  
Gold Colloids ◽  
Laser Illumination ◽  
Colloidal Gold Nanoparticles

Pulsed-laser illumination of aqueous gold colloids under high pressure enables evaporation from liquid droplets surrounded by a supercritical water layer.

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