Despite the potential, nanotechnology R&D faces several challenges:
1. Funding: Securing sufficient and sustained funding is a perennial issue, especially for long-term research projects. 2. Regulation: Developing appropriate regulatory frameworks that ensure safety without stifling innovation is complex. 3. Public Perception: Addressing concerns about the environmental and health impacts of nanomaterials is crucial for gaining public acceptance. 4. Interdisciplinary Collaboration: Nanotechnology inherently requires collaboration across various scientific disciplines, which can be difficult to coordinate.