About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Controlling Graphene Growth and Cu Geometry to Understand Enhanced Electrical Conductivity of Cu/Graphene Composites |
| Author(s) |
Jiali Yao, Uschuas Dipta Das, Wonmo Kang, Hamid Safari, Md Ashiqur Rahman Laskar, Junghoon Yeom, Umberto Celano |
| On-Site Speaker (Planned) |
Jiali Yao |
| Abstract Scope |
While copper/graphene composites (CGCs) are promising candidates for high-performance conductors, their reported electrical performances are often controversial. This work addresses the current controversy by systematically investigating the correlation between chemical vapor deposition (CVD) growth parameters, Gr morphology, and the resulting electrical conductivity of CGCs across diverse Cu matrices. By tuning CVD parameters, three distinct stages of Gr growth are identified: isolated islands, continuous monolayer, and insertion of extra islands. Conductivity measurements reveal that continuous monolayer graphene in CGC yields the best electrical performance. Furthermore, electrical conductivity improvement (∆σ) is linearly proportional to the specific surface area (As) of the Cu matrix, indicating the importance of Gr volume fraction in CGCs. After careful optimization of both CVD parameters and Cu geometry, a remarkable ∆σ of 17.1% with respect to pure Cu controls is achieved for wire-based CGCs, demonstrating their great potential to address rapidly increasing demand on effective conductors. |