Synthetic channels, such as nanotubes, offer the possibility of ion-selective nanoscale pores which can broadly mimic the functions of various biological ion channels, and may one day be used as antimicrobial agents, or for treatment of cystic fibrosis. We have designed a carbon nanotube that is selectively permeable to anions. The virtual nanotubes are constructed from a hexagonal array of car...

The material properties of sedimentary rocks are controlled by a range of parameters, including grain size, sorting, and modification of the original sediment through the diagenetic processes of compaction and cementation. To isolate the effects of diagenesis, and explore how they modify permeability, we quantified changes in grain and pore morphology accompanying progressive diagenesis of a si...

This article focuses on the study of the release rate in a family of modified silica mesoporous supports. A collection of solids containing ethyl, butyl, hexyl, octyl, decyl, octadecyl, docosyl, and triacontyl groups anchored on the pore outlets of mesoporous MCM-41 has been prepared and characterized. Controlled release from pore voids has been studied through the delivery of the dye complex t...

We develop a theory for polymer translocation driven by a time-dependent force through an oscillating nanopore. To this end, we extend the iso-flux tension propagation theory [Sarabadani et al., J. Chem. Phys. 141, 214907 (2014)] for such a setup. We assume that the external driving force in the pore has a component oscillating in time, and the flickering pore is similarly described by an oscil...

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nanoporous anodic aluminum oxide (aao) has been used in many different fields of science and technology, due to its great structural characteristics. solar selective surface is an important application of this type porous material. this paper investigates the effect of nanoporous aao properties, including; film thickness, pore area percentage and pore diameter, on absorption spectra in the rang...

Two recent papers published in the Journal of General Physiology (Guo and Lu, 2003; Guo et al., 2003) address the mechanism of inward rectification by polyamines in Kir2.1 channels. In these two papers, Guo et al. (2003) extensively analyze channel block by monoamines, diamines (DAs), and polyamines of varying length and charge, using thermodynamic mutant cycles to calculate interaction energie...

The canonical NLT partition function of a quasi-one dimensional (q1D) one-file system equal hard disks Pergamenshchik [19] provides an analytical description the thermodynamics and ordering in this (a pore) as linear density Nd/L where d is disk diameter. We derive formulae for distance dependence translational pair distribution distances between next neighbor disks, then demonstrate their use ...