"Lens" effect in directed assembly of nanowires on gradient molecular patterns

Article Abstract:

A new phenomenon named as 'lens' effect is reported in the directed-assembly process of nanowires on self-assembled monolayer (SAM) patterns. In this process, the adsorption of the nanowires is focused in the nanoscale regions at the center of microscale SAM patterns with gradient surface molecular density just like an optical lens focuses light.

Observations, Nanotechnology, Monomolecular films, Adsorption

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Ion-specific swelling of poly(styrene sulfonic acid) hydrogel

Article Abstract:

The poly(styrene sulfonic acid) hydrogel is prepared by radiation crosslinking to study the ion-specific swelling of radiation containing phenyl ring. The ion effects of gel swelling in low and high concentration salt solutions are discussed in terms of hydrogen bonding through S[O.sub.3.sup.-] and phenyl ring, in addition to other interactions.

Analysis, Hydrogen bonding, Hydrogen bonds, Radiation chemistry

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Trapping of charge carriers in colloidal particles of self-assembled films from Ti[O.sub.2] and poly(vinyl sulfonic acid)

Article Abstract:

The layer-by-layer (LbL) technique is used to prepare self-assembled electrodes consisting of Ti[O.sub.2] nanoparticles and poly(vinyl sulfonic acid) (PVS). The high control of the nanoarchitecture of these LBL films enables a better understanding of the electrochemical and spectroelectrochemical properties.

Titanium dioxide, Nanoparticles

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