排序方式: 共有7条查询结果,搜索用时 15 毫秒
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采用氧化硅材料构建了Cu/SiOx/Al的三明治结构阻变存储器件.用半导体参数分析仪对其阻变特性进行测量,结果表明其具有明显的阻变特性,并且通过调节限制电流,得到了四个稳定的阻态,各相邻阻态的电阻比大于10,并且具有良好的数据保持能力.在不同温度条件下对各个阻态进行电学测试及拟合,明确了不同阻态的电子传输机理不尽相同:阻态1和阻态2为欧姆传导机制,阻态3为P-F(Pool-Frenkel)发射机制,阻态4为肖特基发射机制.根据电子传输机制,建立了铜细丝导电模型并对Cu/SiOx/Al阻变存储器件各个阻态的电致阻变机制进行解释. 相似文献
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13种龟甲的无机元素和氨基酸含量比较 总被引:2,自引:0,他引:2
以13种龟甲为药样,用电感耦合等离子体原子发射光谱法和氨基酸自动分析仪对13种龟甲的无机元素及9种龟甲的氨基酸含量进行测定,为龟甲的品质评价及资源开发利用提供了科学参考。 相似文献
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近年来,新型光催化剂氮化碳(C3N5)因其优异的光捕获性能和独特的二维结构备受关注。然而,较高的电子-空穴复合率严重影响其光催化性能。本研究采用水热法成功合成了氧化镍(NiO)改性的C3N5 p-n异质结纳米光催化剂。结果表明,9-Ni/C3N5纳米光催化剂在可见光照射下表现出优异的析氢性能,其析氢速率可高达357μmol/(g·h),是纯C3N5的107倍。这主要归因于9-Ni/C3N5纳米光催化剂形成p-n异质结,有效促进了光生电子-空穴对的分离,从而提高了析氢效率。 相似文献
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As a fundamental thermodynamic variable, pressure can alter the bonding patterns and drive phase transitions leading to the creation of new high-pressure phases with exotic properties that are inaccessible at ambient pressure. Using the swarm intelligence structural prediction method, the phase transition of TiF3, from R—3c to the Pnma phase, was predicted at high pressure, accompanied by the destruction of TiF6 octahedra and formation of TiF8 square antiprismatic units. The Pnma phase of TiF3, formed using the laser-heated diamond-anvil-cell technique was confirmed via high-pressure x-ray diffraction experiments. Furthermore, the in situ electrical measurements indicate that the newly found Pnma phase has a semiconducting character, which is also consistent with the electronic band structure calculations. Finally, it was shown that this pressure-induced phase transition is a general phenomenon in ScF3, VF3, CrF3, and MnF3, offering valuable insights into the high-pressure phases of transition metal trifluorides. 相似文献
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