Harvard College

Eth Zurich (swiss Federal Institute of Technology)

University of Pennsylvania

Jordan R Raney

Jennifer Ann Lewis

Jochen Mueller

Kristina Shea

Yijie Jiang

Lucia Korpas

Provided are devices and methods that combine material anisotropy with nonlinear structural design to produce structures that precisely and sequentially actuate in response to multiple stimuli, such as water or non-polar solvents. These devices and methods can include bistable anisotropic elements that convert to monostable element upon exposure to a particular stimulus, and anisotropic distortions can be harnessed to change the geometric properties of the element to cross phase boundaries and trigger shape changes at precise times. One can incorporate complex logic into these devices and methods.

Embodied logic and actuation control in soft, stimuli-responsive structures poised near bifurcation points

In one aspect, the present disclosure provides a nozzle for 3-D printing. The nozzle may include a first nozzle tip defining a first outlet, where the first nozzle tip includes a first channel extending therethrough. The nozzle may further include a second nozzle tip defining a second outlet, where the second nozzle tip includes a second channel extending therethrough, and where the first channel surrounds the second outlet. The second nozzle tip may be retracted longitudinally with respect to the first nozzle tip such that the second outlet of the second nozzle tip is located in the first channel.

Core-shell nozzle for three-dimensional printing and method of use

A 3D printed core-shell filament comprises an elongated core radially surrounded by an outer shell with a barrier layer in between, where the elongated core comprises a ductile polymer and the outer shell comprises a stiff polymer having a Young's modulus higher than that of the ductile polymer. A lightweight lattice structure may comprise a plurality of the 3D printed core-shell filaments deposited in layers.

3D printed core-shell filament and method of 3D printing a core-shell filament

Growing community of inventors

Glenside, PA, United States of America

Jordan R Raney