110th Anniversary: Particle Size Effect on Enhanced Graphitization and Electrical Conductivity of Suspended Gold/Carbon Composite Nanofibers,Industrial & Engineering Chemistry Research

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110th Anniversary: Particle Size Effect on Enhanced Graphitization and Electrical Conductivity of Suspended Gold/Carbon Composite Nanofibers
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-01-23 , DOI: 10.1021/acs.iecr.9b06592
Kunal Mondal ₁ , Tanmoy Maitra _{2,

3} , Alok Kumar Srivastava ₄ , Gorakh Pawar ₁ , Michael D. McMurtrey ₁ , Ashutosh Sharma ₂

Affiliation

The fabrication of suspended gold/carbon composite nanofibers on carbon microposts by electrospinning of a gold/polyacrylonitrile (AuNP/PAN) blend precursor is proposed. The fibers were spun on a rotating drum collector for a short duration and carbonized at 900 °C in an inert atmosphere. The in situ fabrication of a monolithic carbon structure consisting of carbon nanofibers on carbon microposts ensures good electrical connection, thereby reducing ohomic resistive mismatch. It was found that the conductivity can be simply tuned about an order of magnitude, compared to virgin carbon nanofibers, by the addition of gold nanoparticles (AuNPs). The conductivity was found to increase with the size (5–20 nm) of the AuNPs, which engendered graphitic microregions in the pyrolyzed nanofibers. The effect of microfabrication/nanofabrication technique on the organization of graphitic planes in the electrospun composite nanofibers studied experimentally and computationally and a templating effect of AuNPs that causes enriched graphitization is proposed.

中文翻译：

110周年：粒径对悬浮金/碳复合纳米纤维增强石墨化和电导率的影响

提出了通过电纺金/聚丙烯腈（AuNP / PAN）共混物前体在碳微柱上制备悬浮金/碳复合纳米纤维的方法。将纤维在旋转的鼓式收集器上短时间纺丝，并在惰性气氛中于900°C碳化。在碳微柱上原位制造由碳纳米纤维组成的整体式碳结构可确保良好的电连接，从而减少欧姆电阻失配。通过添加金纳米颗粒（AuNPs），发现与原始碳纳米纤维相比，电导率可以简单地调整一个数量级。发现电导率随AuNPs尺寸（5-20 nm）的增加而增加，这会在热解纳米纤维中形成石墨微区域。

更新日期：2020-01-24

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