Thermodynamics of adsorption of lysozyme on gold nanoparticles from second harmonic light scattering

2019 ◽  
Vol 21 (14) ◽  
pp. 7675-7684 ◽  
Author(s):  
Kamini Mishra ◽  
Puspendu K. Das
Keyword(s):  
Gold Nanoparticles ◽  
Light Scattering ◽  
Second Harmonic ◽  
Thermodynamics Of Adsorption ◽  
Entropy Contribution ◽  
Lysozyme Adsorption

Lysozyme adsorption on gold nanoparticles is an enthalpically driven process while the entropy contribution is favourable but insignificant.

Second-harmonic generation from arrays of symmetric gold nanoparticles

2006 ◽  
Vol 73 (4) ◽  
Author(s):  
M. D. McMahon ◽  
R. Lopez ◽  
R. F. Haglund ◽  
E. A. Ray ◽  
P. H. Bunton
Keyword(s):  
Gold Nanoparticles ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic

scholarly journals A simple and sensitive sensor for silver ions based on unmodified gold nanoparticles by using dynamic light scattering techniques

2017 ◽  
Vol 95 (12) ◽  
pp. 1267-1272 ◽  
Author(s):  
Zhiyou Xiao ◽  
Anjiang Tang ◽  
Hongsheng Huang ◽  
Ze Wang
Keyword(s):  
Gold Nanoparticles ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
High Sensitivity ◽  
Silver Ions ◽  
Hydrodynamic Diameter ◽  
Optimum Conditions ◽  
Sensitivity And Selectivity ◽  
Sensitive Sensor ◽  
Average Hydrodynamic Diameter

A simple and sensitive assay for Ag+ was developed with unmodified gold nanoparticles (AuNPs) by using dynamic light scattering techniques. Ag+ could induce the oligonucleotide (5′-ATC ACT ATA TCA TAT ACT CAT-3′) to change from a single-stranded structure to a double-stranded structure and desorb from the surface of AuNPs, which triggered the aggregation of AuNPs in the salt solution. The average hydrodynamic diameter of aggregated AuNPs could be detected by using dynamic light scattering techniques. Under the optimum conditions, the average hydrodynamic diameter of AuNPs is proportional to the concentration of Ag+ within the range of 13.3–100.0 nmol/L, with a detection limit of 3.2 nmol/L. The method is easy to operate and has low sample consumption, high sensitivity and selectivity.

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