Nanofluidics has a very promising future owing to its numerous applications in many domains. It remains, however, very difficult to understand the basic physico-chemical principles that control the behavior of solvents confined in nanometric channels. Here, water and ion transport in carbon nanotubes is investigated using classical force field molecular dynamics simulations. By combining one single walled carbon nanotube (uniformly charged or not) with two perforated graphene sheets, we mimic single nanopore devices similar to experimental ones. The graphitic edges delimit two reservoirs of water and ions in the simulation cell from which a voltage is imposed through the application of an external electric field. By analyzing the evolution of the electrolyte conductivity, the role of the carbon nanotube geometric parameters (radius and chirality) and of the functionalization of the carbon nanotube entrances with OH or COO− groups is investigated for different concentrations of group functions.
Le matériel génétique contenu dans un virus est enfermé dans une coquille protectrice de protéines, appelée capside. Il y a 50 ans, des virologues ont proposé un modèle géométrique simple (...)
V.L Lorman and S.B. Rochal
Before starting the program, please, read attentively the user’s note. The program generates the irreducible structures with icosahedral symmetry on the spherical (...)
Nous travaillons sur des problèmes qui se trouvent à l’interface de la physique de la matière molle et de la biologie. On s’intéresse tout d’abord à la motilité de type reptation des cellules (...)