Highly regulated core-shell Fe(3)O(4)-poly(3, 4-ethylenedioxythiophene) (PEDOT) microspheres were successfully synthesized by a two-step method in the presence of polyvinyl alcohol (PVA) and p-toluenesulfonic acid (p-TSA). And their morphology, microstructure, electromagnetic and microwave absorbing properties were subsequently characterized. By simply adjusting the molar ratio of 3, 4-ethylenedioxythiophene (EDOT) to Fe(3)O(4) (represented by (EDOT)/(Fe(3)O(4))), the thickness of the polymer shell can be tuned from tens to hundreds of nanometers. Moreover, it was found that the composite exhibited excellent microwave absorbing property with a minimum reflection loss (RL) of about -30 dB at 9.5 GHz with a (EDOT)/(Fe(3)O(4)) ratio of 20.

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Detection of slow or limited landslide movement within broad areas of forested terrain has long been problematic, particularly for the Cascade landslide complex (Washington) located along the Columbia River Gorge. Although parts of the landslide complex have been found reactivated in recent years, the timing and magnitude of motion have not been systematically monitored or interpreted. Here we apply novel time-series strategies to study the spatial distribution and temporal behavior of the landslide movement between 2007 and 2011 using InSAR images from two overlapping L-band ALOS PALSAR-1 satellite tracks. Our results show that the reactivated part has moved approximately 700 mm downslope during the 4-year observation period, while other parts of the landslide complex have generally remained stable. However, we also detect about 300 mm of seasonal downslope creep in a terrain block upslope of the Cascade landslide complex-terrain previously thought to be stable. The temporal oscillation of the seasonal movement can be correlated with precipitation, implying that seasonal movement here is hydrology-driven. The

The combined application of continuous Global Positioning System data (high temporal resolution) with spaceborne interferometric synthetic aperture radar data (high spatial resolution) can reveal much more about the complexity of large landslide movement than is possible with geodetic measurements tied to only a few specific measurement sites. This approach is applied to an ~4 km2 reactivated translational landslide in the Columbia River Gorge (Washington State), which moves mainly during the winter rainy season. Results reveal the complex three‐dimensional shape of the landslide mass, how onset of sliding relates to cumulative rainfall, how surface velocity during sliding varies with location on the topographically complex landslide surface, and how the ground surface subsides slightly in weeks prior to downslope sliding.

Low-potential electrochemical polymerization of a series of aromatic ethers in boron trifluoride diethyl etherate (BFEE), such as diphenyl ether (DPE), 1,4-diphenoxybenzene (DPOB), and 2,2 0 -dinaphthyl ether (DNE), led to successful deposition of a new class of electrically conducting protondoped poly(aromatic ethers) thin films exhibiting good electroactivity and high thermal stability, whereas their sulfur analogues, diphenyl sulfide (DPS) and diphenyl sulfone (DPSO), were not eletropolymerizable. FT-IR, 1 H NMR spectra, and computational results demonstrated that poly(1,4-diphenoxybenzene) (PDPOB) were synthesized mainly through the coupling of DPOB at para-positions, while the polymerization of DNE occurred probably at Rand C 6 -positions of the naphthyl rings to form poly(2,2 0 -dinaphthyl ether) (PDNE) with complex structure. It was found that the electrodeposited poly(aromatic ethers) probably showed proton-doping nature similar to polyaniline based on FT-IR spectral results and conductivity investigation. As-formed PDPOB and PDNE were typical blue light emitters and highly fluorescent, with solution quantum yields of as high as 0.40 and 0.18, respectively. Surface morphology determination revealed that regular and homogeneous microspheres with diameters in the range from 200 nm to 1 μm were assembled on ITO electrode after electrochemical growth. Electro-oxidation of aromatic ethers therefore offers a ready route to novel conducting, redox-active, luminescent conjugated polymers. These materials open up a new, unexplored, and potentially vast area of research on poly(aromatic ethers) and hold promise for the design of a new generation of optoelectronic materials.

Landslides modify the natural landscape and cause fatalities and property damage worldwide. Quantifying landslide dynamics is challenging due to the stochastic nature of the environment. With its large area of~1 km 2 and perennial motions at~10-20 mm per day, the Slumgullion landslide in Colorado, USA, represents an ideal natural laboratory to better understand landslide behavior. Here, we use hybrid remote sensing data and methods to recover the four-dimensional surface motions during 2011-2018. We refine the boundaries of an area of~0.35 km 2 below the crest of the prehistoric landslide. We construct a mechanical framework to quantify the rheology, subsurface channel geometry, mass flow rate, and spatiotemporally dependent pore-water pressure feedback through a joint analysis of displacement and hydrometeorological measurements from ground, air and space. Our study demonstrates the importance of remotely characterizing often inaccessible, dangerous slopes to better understand landslides and other quasi-static mass fluxes in natural and industrial environments, which will ultimately help reduce associated hazards.

Via the combination of an electrospinning method with a hydrothermal reaction, a large-scale cedar-like hierarchical nanostructured TiO(2) film with an anatase/rutile composite phase was fabricated.