Biohybrid Devices: Prototyping Interactive Devices with Growable Materials

Title of the Paper

Biohybrid Devices: Prototyping Interactive Devices with Growable Materials

Paper Information

• Research Area: Human-Computer Interaction Design and Sustainable Device Prototyping
• Keywords: Biohybrid devices, growable materials, bacterial cellulose, embedded electronics, sustainable design, biomanufacturing, bioassembly, interactive interfaces, biomaterials

Research Background and Problems

• Identified Problems or Challenges:

  • The application of biomaterials in human-computer interaction design is gaining traction, but systematic exploration of how to integrate electronic components with these growable materials to achieve interactive functionality is still lacking.
  • Existing manufacturing methods struggle to fully utilize the lifecycle of biomaterials, and embedding electronic devices may lead to issues such as corrosion.

• Significance of the Research:

  • Biomaterials, with their self-growing and decomposing properties, offer a new paradigm for sustainable design, helping to reduce carbon emissions associated with traditional polymer and silicon-based materials in electronics manufacturing.
  • This research promotes environmentally friendly human-computer interaction design while exploring new interactive experiences and manufacturing processes.

• Motivation and Related Work:

  • Previous studies have focused on passive objects made from biomaterials, but few have systematically discussed how to integrate these materials with embedded electronic components.
  • Bacterial cellulose (BC) is an ideal candidate for exploring biohybrid interactive devices due to its physical and chemical stability and ease of handling in DIY environments.

Solution

• Method or Solution:

  • Proposes a biohybrid device manufacturing framework based on the lifecycle of bacterial cellulose, encompassing three stages: growth stage, stabilization stage, and inactive stage.
  • Develops novel manufacturing techniques for embedding conductive elements, sensors, and output components at each stage, such as bioassembly, layering, and filling.

• Innovative Aspects of the Solution:

  • Lifecycle-based embedding approach: Embeds electronic components during the natural growth process of the material, avoiding traditional layered manufacturing workflows.
  • Support for DIY prototyping environments: Manufacturing techniques require only simple tools and commercially available materials, lowering professional barriers.
  • Composable techniques: The techniques within the framework can be used independently or combined to create more complex devices.

• Implementation Steps and Key Techniques:

  • Growth Stage: Uses the "Grow Around" technique to allow bacterial cellulose to encapsulate electronic components during growth.
  • Stabilization Stage: Employs layering, injecting (Imbuing), and slicing & inserting techniques to embed sensors and conductive materials.
  • Inactive Stage: Utilizes laser engraving and filling techniques or painting and stencil painting methods to create conductive circuits on dried cellulose substrates.

Research Outcomes

• Specific Outcomes:

  • Proposed an innovative manufacturing framework based on the lifecycle of bacterial cellulose.
  • Developed seven unique manufacturing techniques and applied them to 14 electronic device prototypes, showcasing various input and output functionalities.
  • Created three application case devices: a shoulder-responsive accessory, a wearable wristband, and a deformable game controller.

• Comparative Advantages Over Existing Solutions:

  • Sustainability: Utilizes the renewability and biodegradability of bacterial cellulose, reducing reliance on traditional petroleum-based materials.
  • Design Flexibility: The developed techniques support the embedding of various input/output components while maintaining mechanical flexibility and durability.
  • Ease of Operation: Simplified manufacturing processes suitable for design and production in non-professional environments.

• Experimental or Evaluation Results:

  • Compatibility tests of various conductive materials and techniques, assessing the physical properties and conductivity of materials at different stages.
  • Demonstrated functional prototypes with customized sensors, visual displays, and interactive behaviors.

• Limitations and Future Directions:

  • Limitations:
    • Stability and lifespan of biomaterials depend on drying and processing methods.
    • Embedded electronic components may be affected by environmental humidity and temperature.
    • Compatibility with different materials requires further exploration.
  • Future Directions:
    • Extend the framework to accommodate other growable biomaterials, such as mycelium and plants.
    • Develop new techniques to support device repair, component recycling, and reuse.
    • Explore automated processes for DIY or industrial environments.

Through these contributions, this research establishes a foundation for the development of biohybrid devices in the field of human-computer interaction design, while providing a practical framework and methods for creating sustainable prototype devices.