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Single-crystal samples of [(BEDT-TTF)(2)]+[Cu(NCS)(2)]-were synthesized and studied with a scanning tunneling microscope (STM). Real-space images of the anion and cation surfaces with molecular resolution were obtained. The images show no evidence of structural disorder or stacking faults previously suggested. The presence of an additional modulation commensurate with the lattice provides evidence of a lattice distortion. The cause of this modulation is unknown. The presence of a charge density wave in the material would have implications on the dimensionality of the material that may explain the peculiar temperature dependence of the electrical conductivity. This interpretation is consistent with the calculated Fermi surface, which allows nesting of the wave vector.

A hybrid SC/SF model to describe the adsorption of weak polyelectrolytes on metal oxide surfaces is presented. This model couples the surface complexation (SC) model for the effects of surface and solute speciation on the adsorption of monomers on oxides with the Scheutjens-Fleer (SF) model for the effects of macromolecular properties on the adsorption of polymers and polyelectrolytes on surfaces. The average magnitude of the specific interactions between polyelectrolyte functional groups and surface sites, expressed by the parameter χ s (hyb), varies systematically with surface and polyelectrolyte speciation and hence with solution chemistry. Measurements of the adsorption of polygalacturonic acid (PGUA) on hematite over wide ranges of pH and ionic strength are used to test the hybrid model. Good agreement of model simulations and adsorption measurements is achieved. A reaction represented by >MeOH + L -) >MeOHLprovides the best representation of the experimental data.

This paper designs an agricultural machinery positioning monitoring system, which can collect the positioning information of agricultural machinery operation, and is of great significance for precision agriculture. The system uses stm32f103rct6 as the controller, with Beidou + GPS dual positioning module and display screen and other related accessories, to achieve the accuracy and real-time positioning of agricultural machinery.

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