11 Matching Annotations
  1. Apr 2020
    1. micro–computed tomography (μCT)

      Micro-computed tomography (Micro-CT) is a 3D imaging technique utilizing X-rays to see inside an object, slice by slice. It is similar to a CT scan, but on a micro-scale. Micro-CT provides high resolution 3D imaging of the interior structure of materials and biological samples without having to cut the samples.

    2. printed collagen had extensive cell infiltration and collagen remodeling

      FRESH-printed collagen disks had more cells and much deeper cell penetration in comparison to cast collagen disks. These results shows that FRESH-printed implants provide a better platform for host cells to move into and grow.

    3. Filament morphology from solid-like to highly porous was controlled by tuning the collagen gelation rate using salt concentration and buffering capacity of the gelatin support bath

      The authors were able to control the porosity of the 3D printed filaments by controlling the salt concentration and pH of the support bath.

    1. C. Keplinger, T. Li, R. Baumgartner, Z. Suo, S. Bauer, Soft Matter 8, 285–288 (2012).

      Annotate under References

    2. A single-unit planar HASEL actuator (Fig. 3C) was activated by increasing DC voltage in discrete steps and achieved a maximum of 79% linear actuation strain under a load of 250 g (actuation stress ~32 kPa), exceeding typical values of strain observed for biological muscle (26).

      Annotate under Conclusions

    3. To compare the actuation response of HASEL and DE actuators, we measured area strain as a function of voltage for two circular actuators with the same total dielectric thickness, t (Fig. 3A).

      Annotate under AuthorsExperiments. To test the effectiveness of their design, the authors fabricated a dielectric (DE) actuator and a HASEL actuator with same dimensions. They tested the amount of in-plane expansion as a function of voltage. HASEL actuators expanded more (46% compared to 12%) under same conditions.

    4. The stacked actuators readily showed large actuation response

      Annotate under conclusions: The HASEL actuators can be actuated (expand and contract) up to 20 times per second.

    5. Conversion efficiency was 21%

      Annotate under Conclusions. Conversion efficiency means what percentage of the electrostatic energy fed into the actuator is converted into mechanical energy.

    6. hydraulically amplified self-healing electrostatic (HASEL) actuators

      Let's annotate the entire phrase (Hydraulically amplified self-healing electrostatic actuators) under Glossary. You have an explanation of this down below. I'm including an edited, shortened copy of it here for the annotation:

      A device which generates movement from electrical energy. The device consists of liquid segments which helps amplifying force generation and heals itself in case of an electrical breakdown.

    7. dielectric breakdown

      Annotate under Glossary

  2. Mar 2020
    1. 1. J. U. Lind et al., Nat. Mater. 16, 303–308 (2017).

      Researchers from Center for Nano-scale Systems (CNS) developed a method to easily and inexpensively 3D print microphysiological devices (MPS), also known as organ on a chip, in order to test experiments in situations very similar to the human body without putting anyone at risk.