Kinetics of Langmuir Films of Fullerene C60

Evans, Arthur

doi:10.1021/jp981729l

Cited by 18 publications

(19 citation statements)

References 23 publications

(56 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The conventional Langmuir–Blodgett technique based on the monolayer or multilayer transfer from the surface of water onto a solid support is not suitable for the preparation of fullerene layers because these substances do not form stable monolayers at the water–air interface. The spreading of fullerene from organic solvents onto the water surface results in heterogeneous and very fragile layers of variable thickness. , To overcome this problem, one can use the chemical modification of fullerenes. The most frequently applied fullerene derivatives are also insoluble in water but can be spread along the surface, leading to the formation of more homogeneous layers. − Only recently it has been shown that water-soluble derivatives of C 60 fullerene with arginine and lysine possess surface activity and thereby form spontaneously macroscopically homogeneous adsorption layers at the water–air interface …”

Section: Introductionmentioning

confidence: 99%

“…The spreading of fullerene from organic solvents onto the water surface results in heterogeneous and very fragile layers of variable thickness. 7,8 To overcome this problem, one can use the chemical modification of fullerenes. The most frequently applied fullerene derivatives are also insoluble in water but can be spread along the surface, leading to the formation of more homogeneous layers.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic Surface Properties of Fullerenol Solutions

et al. 2019

View full text Add to dashboard Cite

Application of dilational surface rheology, surface tensiometry, ellipsometry, Brewster angle, and transmission electron and atomic force microscopies allowed the estimation of the structure of the adsorption layer of a fullerenol with a large number of hydroxyl groups, C60(OH) X (X = 30 ± 2). The surface properties of fullerenol solutions proved to be similar to the properties of dispersions of solid nanoparticles and differ from those of the solutions of conventional surfactants and amphiphilic macromolecules. Although the surface activity of fullerenol is not high, it forms adsorption layers of high surface elasticity up to 170 mN/m. The layer consists of small interconnected surface aggregates with the thickness corresponding to two–three layers of fullerenol molecules. The aggregates are not adsorbed from the bulk phase but formed at the interface. The adsorption kinetics is controlled by an electrostatic adsorption barrier at the interface.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Surface Properties of Fullerenol Solutions

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Their high cohesive energy of more than 30 kcal/mol 12,28,29 reflects the strong intermolecular attractive π−π interactions, and, in turn, C 60 aggregates spontaneously and forms very stable van der Waals crystals. As a direct consequence, [60] fullerene is only sparingly soluble in most organic solvents. , Recently, also a simplified kinetic model of the interaction between [60] fullerene and the water surface has been proposed …”

Section: Introductionmentioning

confidence: 99%

Interfacial Properties of Substituted Fulleropyrrolidines on the Water Surface

et al. 2000

View full text Add to dashboard Cite

A series of novel substituted fulleropyrrolidines have been synthesized and characterized. A correlation between the substituent structure and the spreading behavior at the air-water interface has been proposed through the systematic study of their Langmuir films. This evidences that only some derivatives are suitable to form true monolayers at the air-water interface, because of the strong π-π intermolecular attractive forces among C60 spheres. The factors that influence the nature of the floating layers on the water subphase have been identified. At last, tuneable parameters for the preparation of real and stable monolayers of fullerene derivatives have been proposed.

show abstract

“…The particles’ distribution of FNPs was measured using dynamic light scattering (DLS) and Z potential, as presented in Figure S1. Many pieces of literature reported that fullerenol is easy to aggregate in an aqueous solution. − Using the DLS to detect the FNPs in solution, the bigger size of these FNPs than in the AFM image suggested the occurrence of aggregation in the aqueous solution. Using a transmission electron microscope, FNPs with different isoelectric points were detected in our laboratory, as stated in another article .…”

Section: Resultsmentioning

confidence: 99%

Fullerenol Nanoparticles Eradicate Helicobacter pylori via pH-Responsive Peroxidase Activity

Zhang

Chen

Kong

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Helicobacter pylori (H. pylori) eradication by antibiotics and proton pump inhibitor treatment is limited by the low pH microenvironment in the stomach and can lead to antibiotic resistance. We fabricated fullerenol nanoparticles (FNPs) with varied chemical structures responding to a pinacol rearrangement of vicinal hydroxyl to form carbonyls in low pH environments. An obvious increase in CO/C−O was induced in low pH and was positively correlated with a peroxidase-like activity. The FNPs exerted an excellent effect on H. pylori eradication in vitro and in vivo because of their peroxidase-like activity. FNP treatment of a H. pylori biofilm revealed that FNPs broke down polysaccharides in cell wall components, resulting in collapse of the bacteria. The cycles of FNPs combining and dissociating with the peroxidase substrate were detected by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and confirmed that FNPs enhance peroxidase-like activity. Further, the isothermal titration calorimetry results showed that FNPs with more CO/C−O had greater affinity to bind the peroxidase substrates. Therefore, we suggest that varied CO/ C−O serves as a switch to respond to low pH in the stomach to kill H. pylori by inducing a peroxidase-like activity. FNPs can also overcome the challenge of antibiotic resistance to achieve H. pylori eradication in the stomach.

show abstract

Kinetics of Langmuir Films of Fullerene C60

Cited by 18 publications

References 23 publications

Dynamic Surface Properties of Fullerenol Solutions

Dynamic Surface Properties of Fullerenol Solutions

Interfacial Properties of Substituted Fulleropyrrolidines on the Water Surface

Fullerenol Nanoparticles Eradicate Helicobacter pylori via pH-Responsive Peroxidase Activity

Contact Info

Product

Resources

About