Friction of flat and micropatterned interfaces with nanoscale roughness

Acknowledgements: The authors would like to acknowledge the support of the Leverhulme Trust for supporting the work via project grant “Fundamental Mechanical Behaviour of Nano and Micro Structured Interfaces” (RPG-2017-353). EPSRC support (for AH) is also acknowledged via an EPSRC-DTP studentship (EP/N509668/1). We would also like to thank the technical staff at the James Watt Nanofabrication Centre (JWNC) for assistance in fabricating the structured Si samples. The authors also acknowledge the assistance of Ms Sarah Fontana in producing the 3D solid model in Fig. 4. Finally, S.B-J acknowledges the support of the Saudi Arabian Cultural Bureau in London and Al-Imam Mohammad Ibn Saud Islamic University (IMISU), Riyadh for sponsoring and supporting his PhD studiesPeer reviewedPublisher PD