Electrochemical Measurement of the Free Energy of Adsorption ofn-Alkanethiolates at Ag(111)

1998 ◽  
Vol 120 (5) ◽  
pp. 1062-1069 ◽  
Author(s):  
David W. Hatchett ◽  
Rory H. Uibel ◽  
Keith J. Stevenson ◽  
Joel M. Harris ◽  
Henry S. White
Keyword(s):  
Free Energy ◽  
Electrochemical Measurement ◽  
Free Energy Of Adsorption

Standard Free Energy of Adsorption at Liquid Interfaces

1991 ◽  
pp. 277-292 ◽  
Author(s):  
D. K. Chattoraj ◽  
L. N. Ghosh ◽  
P. K. Mahapatra
Keyword(s):  
Free Energy ◽  
Standard Free Energy ◽  
Liquid Interfaces ◽  
Free Energy Of Adsorption

scholarly journals The adsorption characteristics and porous structure of bentonite adsorbents, determined from the adsorption isotherms of benzene vapor

2004 ◽  
Vol 69 (2) ◽  
pp. 145-151 ◽  
Author(s):  
Snezana Brezovska ◽  
Biljana Marina ◽  
Biljana Panova ◽  
Donco Burevski ◽  
Vasa Bosevska ◽  
...  
Keyword(s):  
Free Energy ◽  
Porous Structure ◽  
Pore Size ◽  
Adsorption Isotherms ◽  
Micropore Volume ◽  
Benzene Vapor ◽  
Free Energy Of Adsorption ◽  
Volume Filling ◽  
Activated Bentonite ◽  
Characteristic Values

The adsorption of benzene vapor on natural and acid activated bentonites was treated by the theory of volume filling of micropores. The micropore volume and characteristic values of the free energy of adsorptionwere determined from the adsorption isotherms. The Dubinin?Radushkevish?Stoeckli and Dubinin?Astakhov equations were used for this purpose. The results showed that natural bentonite has a more homogeneous micropore structure than the acid activated ones. The characteristic values of the free energy of adsorption for the natural bentonite were higher than those of the acid activated bentonite. This is due to differences in its structure and the pore size.

Particles in monolayers and thin liquid films

Surfactants ◽  
2019 ◽  
pp. 467-500
Author(s):  
Bob Aveyard
Keyword(s):  
Free Energy ◽  
Particle Surface ◽  
Line Tension ◽  
Liquid Films ◽  
Thin Liquid Films ◽  
Fluid Interfaces ◽  
Free Energy Of Adsorption ◽  
Three Phase ◽  
Oil Water ◽  
Particle Adsorption

Small particles can adsorb strongly at fluid interfaces and form monolayers which can be studied using a Langmuir trough. For sufficiently large particles the monolayers can be viewed microscopically. The driving force for particle adsorption is the concomitant removal of fluid/fluid interface. For very small adsorbed particles, the free energy of forming the three-phase contact line around particles (hence the line tension) may also contribute significantly to the free energy of adsorption. Adsorption can be enhanced by having areas of particle surface with different wettability (Janus particles). Monolayers have structures dependent on lateral interactions between particles; for particles at the oil/water interface, electrical repulsion through oil is often the dominant interaction, which can give rise to highly ordered monolayers. Adsorbed particles can either inhibit or facilitate the formation of stable thin liquid films, depending on particle wettability.

scholarly journals First-principles study of coadsorption of Cu2+ and Cl− ions on the Cu (110) surface

RSC Advances ◽  
2020 ◽  
Vol 10 (14) ◽  
pp. 8212-8217
Author(s):  
Khoong Hong Khoo ◽  
Bharathi Madurai Srinivasan ◽  
Ramanarayan Hariharaputran ◽  
Chaitanya Amol Joshi ◽  
David Wu Tai-Yen ◽  
...  
Keyword(s):  
Free Energy ◽  
Dft Calculations ◽  
First Principles ◽  
Electrode Potential ◽  
Free Energy Of Adsorption ◽  
First Principles Study

Free energy of adsorption for the most stable phases predicted by DFT calculations as a function of electrode potential.

Solution NMR Spectroscopy as a Useful Tool to Investigate Colloidal Nanocrystal Dispersions from the Capping Ligand's Point of View

2006 ◽  
Vol 984 ◽  
Author(s):  
Jose C Martins ◽  
Jose C Martins ◽  
Iwan Moreels ◽  
Zeger Hens
Keyword(s):  
Quantum Dots ◽  
Free Energy ◽  
Field Gradient ◽  
Dynamic Equilibrium ◽  
Semiconductor Nanocrystals ◽  
Point Of View ◽  
Solution Nmr ◽  
Free Energy Of Adsorption ◽  
Ligand Interaction ◽  
Pulsed Field

AbstractColloidal semiconductor nanocrystals or quantum dots are an important building block in bottom-up nanotechnology. They consist of an inorganic, crystalline core surrounded by a monolayer of organic ligands. As these ligands can be modified or exchanged for others, they provide a convenient way to give the quantum dots functionality. Here, we show that solution NMR techniques, including diffusion pulsed field gradient spectroscopy, is a very useful tool to investigate the ligands of colloidal nanocrystals. This is demonstrated using InP quantum dots with trioctylphospine oxide ligands as an example. Combining 1H-13C HSQC spectroscopy with pulsed field gradient diffusion NMR, an unequivocal identification of the resonances of the bound ligands is possible. This leads to the determination of the diffusion coefficient of the nanocrystals in solution and allows to verify capping exchange procedures. By calibrating the surface area of the NMR resonances using a solute of known concentration, the density of ligands at the nanocrystal surface can be quantified. We could demonstrate that a dynamic equilibrium exists between bound and free ligands. Analysis of the corresponding adsorption isotherm - determined using 1H NMR - leads to an estimation of the free energy of adsorption and the free energy of ligand-ligand interaction at the nanocrystals surface. Similar investigations are in progress on capped PbSe and ZnO2 nanoparticles. Preliminary results strongly support the generic nature of the approach described for the case of TOPO capped InP nanocrystals.

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