Speaker: Dr Naveen Narasimhachar Joshi, Department of Materials Science and Engineering, 
North Carolina State University, Raleigh, NC, USA.

Title: "Q-Carbon: Science to Technology"
Date: Thursday, 7th May 2026 - Time: 4 PM
Hi Tea & Coffee: 5 PM

Venue: CeNSE Seminar Hall

Abstract:

Quenched-in carbon (Q-carbon) is a non-equilibrium carbon allotrope with a dense, predominantly 
sp3-bonded structure, enabling enhanced mechanical properties and compatibility with diamond growth. 
In this talk, I present the synthesis of pristine Q-carbon films via plasma-enhanced chemical vapour 
deposition, using controlled low-energy Ar⁺ ion bombardment. I discuss the formation mechanism and 
demonstrate wafer-scale integration of high-quality films on substrates up to 12ʺ. Q-carbon enables rapid, 
adherent growth of continuous diamond films, overcoming key deposition limitations. I further demonstrate 
intrinsic room-temperature ferromagnetism (TC ~550 K) and enhanced antimicrobial performance, highlighting 
Q-carbon as a multifunctional platform for electronic, coating, and biomedical applications.

Biography:

Naveen Joshi is a PhD candidate in Materials Science and Engineering at North Carolina State University, USA, 
working in Prof. Jagdish Narayan’s group on non-equilibrium synthesis of carbon- and silicon-based thin films for 
microelectronic and biomedical applications. He received his MTech. degree from IIT-Kharagpur, graduating with 
the Institute Gold Medal. His research spans plasma-assisted CVD, laser-driven phase transformations, and 
wafer-scale integration of Q-carbon. As a lead collaborator with Oak Ridge National Laboratory, he co-discovered 
Q-silicon and received the Excellence in Graduate Research Award. He has authored 20+ journal publications, 
2 book chapters, delivered 15+ international presentations, and serves as a reviewer, bridging discovery with 
scalable device technologies.

Host Faculty:  Prof. Shivshankar S.A.