排序方式: 共有18条查询结果,搜索用时 15 毫秒
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Electrical conduction of evaporated PbSnS3 films of thickness ranging between 0.1 and 2.0 μm were studied by measuring the dc current in both parallel (planar) and
transverse (cross plane) directions to the substrate surface. Conduction mechanisms relevant to various regions of the current-voltage
characteristics are discussed. The obtained film conductivities were of the order 10−5 S cm−1 at room temperature and increased exponentially with increasing temperature. No consistent modification of the conductivity
values and nature were observed when the films are doped with CdCl2, PbCl2 and CuI impurities. While planar conductivity activation energies were constant with voltage and increased slightly with
deposition temperature, the cross plane values were found to depend on both voltage and film deposition temperature. 相似文献
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Sookyung Choi Minjun Yan Liang Wang Ilesanmi Adesida 《Microelectronic Engineering》2009,86(4-6):521-523
Ultra-dense nanometer-scale gratings (20 nm pitch) on thin silicon nitride (Si3N4) membrane substrates using hydrogen silsesquioxane (HSQ) resist have been fabricated. Scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS) were performed to evaluate the pattern quality of the HSQ gratings. The results are compared with HSQ gratings fabricated on silicon substrates. 相似文献
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E Ilesanmi Adeyeye H Omolara Adubiaro 《Journal of the science of food and agriculture》2004,84(5):411-414
The protein, ash, fibre and individual mineral ion contents of three species of prawn taken from the Lagos lagoon were determined. The median liveweights of Macrobrachium vollenhovenii (Herklots), Palaemon species A (Powell) and Penaeus notialis were respectively, 25.52 g (shell + head 16.76 g; flesh 9.26 g), 3.15 g (shell + head 1.71 g; flesh 1.44 g) and 5.11 g (shell + head 2.14 g; flesh 2.96 g). All (shell + head) samples had high protein, ash and fibre contents but only the protein content was high in the flesh, which had low or undetectable quantities of fibre. The fat and carbohydrates contents were generally low. In M vollenhovenii the (shell + head) was a better source of Mg, Zn, Cu and K than the flesh, which was a better source of Ca, Ni, P, Fe, Co and Na. In P species A the (shell + head) was a better source of Ca, Mg, P, Cu, Co, Na and K than the flesh (higher in Zn and Ni). In P notialis the (shell + head) was the better source of Ca, Zn, P, Fe and Co and the flesh the better source of Mg, Ni, Fe, Na and K. Copyright © 2004 Society of Chemical Industry 相似文献
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Oluwabamise L. Faboya Abiodun A. Ojo Hafsat Bello Ilesanmi Osasona 《Petroleum Science and Technology》2018,36(2):130-135
The concentrations of trace elements in crude oil samples from the Northern and Central swamps depobelts in the Niger Delta basin were investigated using Flame Atomic Absorption Spectrometer. The origin, source facies, and depositional environment of organic matter that produced the oils were determined based on the trace elements concentrations. The concentrations of the trace elements (Cr, Cu, Fe, Mn, Ni and V) ranged from 0.04 to 5.71 ppm. Iron is the most abundant element in the samples while Cr has the least concentration. The results from trace metal geochemistry showed that the Niger Delta oils were derived predominantly from terrestrial organic matter deposited in the oxic depositional environment. The concentrations and ratios of nickel and vanadium grouped the oils into two distinct families reflecting the depobelt the oils belong. This observation indicates that the source rocks in the two depobelts were formed from organic matter of different source facies. 相似文献