scholarly journals ELECTRICAL TRANSPORT AND CONTACT PROPERTIES OF LOW RESISTIVITY n‐TYPE ZINC SULFIDE CRYSTALS

1965 ◽  
Vol 7 (1) ◽  
pp. 8-10 ◽  
Author(s):  
Manuel Aven ◽  
C. A. Mead
Keyword(s):  
Zinc Sulfide ◽  
Electrical Transport ◽  
Low Resistivity

Erratum: Electrical transport in low-resistivity amorphous metals

1983 ◽  
Vol 28 (12) ◽  
pp. 7353-7353
Author(s):  
L. V. Meisel ◽  
P. J. Cote
Keyword(s):  
Electrical Transport ◽  
Amorphous Metals ◽  
Low Resistivity

Electrical transport in low-resistivity amorphous metals

1983 ◽  
Vol 27 (8) ◽  
pp. 4617-4627 ◽  
Author(s):  
L. V. Meisel ◽  
P. J. Cote
Keyword(s):  
Electrical Transport ◽  
Amorphous Metals ◽  
Low Resistivity

ELECTRICAL TRANSPORT AND STABILITY OF TMxSn1-x AMORPHOUS ALLOYS (TM = Fe, Co, Ni)

1980 ◽  
Vol 41 (C8) ◽  
pp. C8-477-C8-480
Author(s):  
G. Marchal ◽  
J. F. Geny ◽  
Ph. Mangin ◽  
Chr. Janot
Keyword(s):  
Electrical Transport ◽  
Amorphous Alloys

VERY LOW RESISTIVITY AuMn GATE OHMIC CONTACTS FOR GaInAs DIFFUSED JFETs

1988 ◽  
Vol 49 (C4) ◽  
pp. C4-453-C4-456 ◽  
Author(s):  
P. E. HALLALI ◽  
P. BLANCONNIER ◽  
L. BRICARD ◽  
J-C. RENAUD
Keyword(s):  
Ohmic Contacts ◽  
Low Resistivity

Integration of Multi-geophysical Approaches to Identify Potential Pathways of Heavy Metals Contamination - A Case Study in Zeida, Morocco

2020 ◽  
Vol 25 (3) ◽  
pp. 415-423
Author(s):  
Ahmed Lachhab ◽  
El Mehdi Benyassine ◽  
Mohamed Rouai ◽  
Abdelilah Dekayir ◽  
Jean C. Parisot ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Seismic Velocity ◽  
Seismic Refraction ◽  
Geophysical Methods ◽  
Low Frequency ◽  
Electrical Current ◽  
P Wave ◽  
Low Resistivity ◽  
Refraction Tomography ◽  
Geophysical Surveys

The tailings of Zeida's abandoned mine are found near the city of Midelt, in the middle of the high Moulouya watershed between the Middle and the High Atlas of Morocco. The tailings occupy an area of about 100 ha and are stored either in large mining pit lakes with clay-marl substratum or directly on a heavily fractured granite bedrock. The high contents of lead and arsenic in these tailings have transformed them into sources of pollution that disperse by wind, runoff, and seepage to the aquifer through faults and fractures. In this work, the main goal is to identify the pathways of contaminated water with heavy metals and arsenic to the local aquifers, water ponds, and Moulouya River. For this reason, geophysical surveys including electrical resistivity tomography (ERT), seismic refraction tomography (SRT) and very low-frequency electromagnetic (VLF-EM) methods were carried out over the tailings, and directly on the substratum outside the tailings. The result obtained from combining these methods has shown that pollutants were funneled through fractures, faults, and subsurface paleochannels and contaminated the hydrological system connecting groundwater, ponds, and the river. The ERT profiles have successfully shown the location of fractures, some of which extend throughout the upper formation to depths reaching the granite. The ERT was not successful in identifying fractures directly beneath the tailings due to their low resistivity which inhibits electrical current from propagating deeper. The seismic refraction surveys have provided valuable details on the local geology, and clearly identified the thickness of the tailings and explicitly marked the boundary between the Triassic formation and the granite. It also aided in the identification of paleochannels. The tailings materials were easily identified by both their low resistivity and low P-wave velocity values. Also, both resistivity and seismic velocity values rapidly increased beneath the tailings due to the compaction of the material and lack of moisture and have proven to be effective in identifying the upper limit of the granite. Faults were found to lie along the bottom of paleochannels, which suggest that the locations of these channels were caused by these same faults. The VLF-EM surveys have shown tilt angle anomalies over fractured areas which were also evinced by low resistivity area in ERT profiles. Finally, this study showed that the three geophysical methods were complementary and in good agreement in revealing the pathways of contamination from the tailings to the local aquifer, nearby ponds and Moulouya River.

Covalent Atomic Bridges Enable Unidirectional Enhancement of Electronic Transport in Aligned Carbon Nanotubes

2019 ◽  
Author(s):  
Mingguang Chen ◽  
Wangxiang Li ◽  
Anshuman Kumar ◽  
Guanghui Li ◽  
Mikhail Itkis ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Transport ◽  
Large Scale ◽  
The Novel ◽  
Electrical Measurements ◽  
Metal Atoms ◽  
Aligned Carbon Nanotubes ◽  
Transport Channels ◽  
Walled Carbon Nanotubes ◽  
Bulk Structures

<p>Interconnecting the surfaces of nanomaterials without compromising their outstanding mechanical, thermal, and electronic properties is critical in the design of advanced bulk structures that still preserve the novel properties of their nanoscale constituents. As such, bridging the p-conjugated carbon surfaces of single-walled carbon nanotubes (SWNTs) has special implications in next-generation electronics. This study presents a rational path towards improvement of the electrical transport in aligned semiconducting SWNT films by deposition of metal atoms. The formation of conducting Cr-mediated pathways between the parallel SWNTs increases the transverse (intertube) conductance, while having negligible effect on the parallel (intratube) transport. In contrast, doping with Li has a predominant effect on the intratube electrical transport of aligned SWNT films. Large-scale first-principles calculations of electrical transport on aligned SWNTs show good agreement with the experimental electrical measurements and provide insight into the changes that different metal atoms exert on the density of states near the Fermi level of the SWNTs and the formation of transport channels. </p>

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