PolyU and HKU Mechanical Engineering Joint Distinguished Lecture - Fantastic Feathers: Hierarchical Structure and Multifunctionality

Guest Speaker: Prof. Lorna Gibson

Matoula S. Salapatas Professor of Materials Science and Engineering
Professor of Mechanical Engineering
MacVicar Faculty Fellow
Department of Materials Science and Engineering
Massachusetts Institute of Technology

Lorna Gibson is the Matoula S Salapatas Professor of Materials Science and Engineering at MIT and a MacVicar Faculty Fellow, MIT’s top award for undergraduate teaching. She is a member of the Board of Directors of the Massachusetts Audubon Society. She has always loved nature and getting outside to walk, bicycle and bird.

When we think of birds, we think of feathers. Feathers give birds their color, from the bright red of a male Cardinal to the iridescent reds and greens of Ruby-throated Hummingbirds. Feathers keep birds warm and dry: down provides excellent insulation against heat loss and water really does roll off a duck’s back. Feathers form the aerodynamic shape of the wing, enabling flight. A Barn Owl’s flight feathers suppress sound, allowing it to fly nearly silently, while its ruff feathers reflect and focus sound into its ears, enabling the owl to hunt in total darkness by sound alone. This talk describes how the microscopic structure of feathers gives rise to some of their remarkable properties.