Dr. Naoe Hosoda
Reversible Interconnection learning from nature
Naoe Hosoda
様々な表面上に容易に着脱することができる虫・爬虫類などの接着のしくみを調査。
Flies, spiders, leaf beetles and lizards have the ability to attach and detach easily to the various surfaces and ceilings and even smooth window glass. On the other hand, deciduous trees possess a excellent design for easy disassembly, in which they spontaneously shed their leaves and fruits. Deciduous tree leaf has a special layer at a base of leaf petiole, called by abscission layer, for shedding leaves. The aim is to develop technologies which enable easy attachment/detachment by researching these kinds of natural mechanisms.
Our research subjects are an adhesive attachment system of animals, abscission of leaves and its mimetic joining technology.
The falling leaf inspired joining technology was developed by making an abscission layer at the bonding interface. The abscission layer is controlled using a field such as magnetic field, electric field, gravitation field, microwave, ambient atmosphere of gases and temperatures. Under the field, the abscission layer becomes brittle. In consequence the joint separates spontaneously. We present three methods for reversible interconnections by 1) growing a brittle abscission layer by a heat treatment, 2) using hydrogen atmosphere to be brittle the abscission layer, and 3) by liquid metal embrittlement of the abscission layer using gallium.
