Professor Nicola M. Pugno - Nanomechanics of The Fantastic 4
Date: Mon 29 Oct 2012, 15:00 - 16:00
Location: Nanoforce Seminar Room
Nanomechanics of The Fantastic 4: Graphene (the strongest), spider silk (the toughest), gecko foot (the most adhesive) and lotus leaf (the most anti-adhesive)
Prof. Nicola M. Pugno
Laboratory of Bio-Inspired Nanomechanics, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy;
website: http://areeweb.polito.it/ricerca/bionanomech/ >http://areeweb.polito.it/ricer
In this talk, at the Queen Mary University, we will present our recent results on the fracture and adhesion of 4 super-nanomaterials:
(i) Graphene, that is the strongest, for which we will briefly discuss the role of defects on the fracture strength by applying our Quantized Fracture Mechanics [1-3] and the role of adhesion on Nanoscrolls [4, 5]; we will also consider collapsed nanotubes cables .
(ii) Spider silk, that is the toughest, for which we will discuss the mechanics, including the flaw tolerance, and the related implications on the entire web [7, 8].
(iii) Gecko foot, that is the most adhesive, for which we will discuss the crucial role of the new theory of multiple peeling  for understanding the smart adhesion.
(iv) Lotus leaf, the is the most anti-adhesive, for which we will discuss the crucial role of the hierarchical topology  in order to activate fakir drops and thus a super-hydrophobic behavior.
 N. Pugno, A quantized Griffith's criterion, Fracture Nanomechanics, Meeting of the Italian Group of Fracture, September 25-26, 2002, Vigevano, Italy.
 N. Pugno, R. Ruoff, Quantized Fracture Mechanics, PHILOSOPHICAL MAGAZINE (2004), 84/27, 2829-2845.
 N. Pugno, Dynamic Quantized Fracture Mechanics. INT. J. OF FRACTURE (2006), 140, 159-168.
 X. Shi, Y. Cheng, N. Pugno, H. Gao, A translational nanoactuator based on carbon nanoscrolls on substrates. APPLIED PHYSICS LETTERS (2010), 96, 053115.
 X. Shi, Y. Cheng, N. Pugno, H. Gao, Tunable water channels with carbon nanoscrolls. SMALL (2010), 6, 739-744.
 N. Pugno, The design of self-collapsed super-strong nanotube bundles. J.
OF THE MECHANICS AND PHYSICS OF SOLIDS (2010), 58, 1397-1410.
 T. Giesa, M. Arslan, N. M. Pugno, M. J. Buehler, Nanoconfinement of spider silk fibrils begets superior strength, extensibility and toughness. NANO LETTERS (2011), 11, 5038-5046.
 S.W. Cranford, A. Tarakanova, N. Pugno, M.J. Buehler, Nonlinear material behaviour of spider silk yields robust webs, NATURE (2011), 482, 72-78.
 N. Pugno, The theory of multiple peeling. INTERNATIONAL JOURNAL OF FRACTURE (2011), Issue on Nanoscale Fracture, Guest Editor Nicola M. Pugno (2011), 171, 185-193  N. Pugno, Mimicking lotus leaves for designing super-hydrophobic/hydrophilic and super-attractive/repulsive hierarchical nanostructured surfaces. THE NANOMECHANICS IN ITALY, Editor Nicola M. Pugno, 1-9, 2007. ISBN: 978-81-308-0237-4.