概括
研究人员使用MCM-41.1在有序纳米通道内创建了导电碳线. 这一过程显著提高了微波导电性,为纳米电子铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 化学 化学 化学
背景情况:
- 像MCM-41这样的半孔材料为有限合成提供有序的纳米结构.
- 具有定制性质的碳材料对于先进的电子应用至关重要.
研究的目的:
- 在MCM-41.1.的纳米通道内合成石墨类型的碳线.
- 调查纳米封闭对碳结构和微波导电性的影响.
- 探索开发纳米电子元件的潜力.
主要方法:
- 在MCM-41的3纳米六角通道内封装石墨类型的碳.
- 在道内通过蒸汽或溶液转移对烯酸单体的聚合.
- 限制聚合物的激素启动和随后的热解以形成碳纤维.
主要成果:
- 在MCM-41纳米通道中成功制造了有序碳丝.
- 实现的微波导电率大约是散装碳化聚烯二的10倍.
- 通过聚合物链对齐,证明了MCM-41宿主在调整碳结构中的作用.
结论:
- 在MCM-41中纳米封闭有效地调整了碳结构,并增强了微波导电性.
- 这种方法为制造纳米级稳定,导电的碳纤维提供了一条途径.
- 这些发现代表了实现纳米电子的重大进步.
相关概念视频
Magnetic Field Due to Two Straight Wires
Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
Magnetic Field Due To A Thin Straight Wire
Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
Magnetic Force On Current-Carrying Wires: Example
In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
Charging Conductors By Induction
The Earth is a good conductor of electricity, and it is so big that it can be considered an infinite source or sink of charges. It can easily exchange charges with any matter.
Generally, conductors like metals do not allow any excess charge to be present on them. Any excess charge added to metals easily flows away, for example, when a metal is placed on the Earth. This process is called earthing.
However, conductors can be charged by a process called induction. For example, consider charging a...
Generally, conductors like metals do not allow any excess charge to be present on them. Any excess charge added to metals easily flows away, for example, when a metal is placed on the Earth. This process is called earthing.
However, conductors can be charged by a process called induction. For example, consider charging a...


