GrowingStructuresGroup:Questions
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What machines can assemble structures at nano scale?
Biological
- Examples:
- Environmental Operating Conditions:
- Energy Requirements:
- Capabilities
- Other Features or Problems:
Chemical
- Examples:
- Environmental Operating Conditions: (fluid, air, other?)
- Energy Requirements:
- Capabilities
- Other Features or Problems:
Mechanical
- Examples:
- Environmental Operating Conditions:
- Energy Requirements:
- Capabilities
- Other Features or Problems:
Other?
- Multisubstrate "cells"?
How can machines be controlled or programmed to produce structures in space and time?
Extrinsic
- Light (visible, 500nm; x-ray, 0.5nm)
- Sound
- Sensors?
- Other
Intrinsic
- DNA
- Digital Memory
- Machine-machine communication
- Amorphous Computing
How could the machines get energy and materials?
Exogenous Supply
- Liquid fuel (e.g., diesel)
- Sugar
- Other
Self-Acquiring
- Carbon fixation
- CO2 quantity in air: 0,00076626 kg/m3 or approx. 1g/m3
- C quantity air: 0,0002088 kg/m3 or approx. 0.2 g/m3
- Carbon material density: 1400 kg/m3 => for 1m3 material 6.7*106m3 of air are needed.
- With air speed or 1m/s → 78 days needed for 1m of CNM
- What about diffusion due to local reduction in partial pressure of CO2?
- Shouldn't be a problem as CO2 is heavier so the molecules will always flow towards the ground
- Photosynthesis
- Other
When would it make sense to do this? E.g., what are the costs of building a house for a family of four?
The question can be easily answered with a building cost estimator, like this one. In summary a 1000 SF brick wall house in San Francisco would cost
- $100,103.00 Material
- $97,566.00 Labor
- $3,613.00 Equipment
- $201,282.00 Total
(the tool generates a much more detailed calculation)
Material costs (should we include environmental costs?)
- Wood
- Concrete
- Brick
- Mud
- Adobe
- Other?
Transportation costs
Construction costs
Maintenance costs
Time costs (e.g., how long does it take?)
Depends very much on material and technology. A wooden house can be fabricated and set on site in 5 days, a house made of concrete or bricks in a few months.
How would all of the above work together as an integrated process / system?
One possible way is the top-down concept, which initiated the first generation of questions. But there are definitely other, maybe better ways.
- Modeling
- what are the requirements for the digital model?
- how to integrate utility systems with the geometry?
- water supply (could it be conducted through nano tubes?)
- sewage
- power system
- communication system
- HVAC
- how to define volumetric zones with required material properties
- how to define material properties (bearing strength, onductivity, transparency)
- what are the requirements for the digital model?
- CNM (carbon Nano Mesh - the material)
- Any attempts to make it?
- What should/could be the physical and chemical characteristics of CNM?
- Analysis
- How to derive statical model?
- What would the structural model look like?
- Thermal model?
- Since the material zones are homogenious, could we simply use FEM model for all?
- Production
- How does information flow look like?
- What are the requirements for the nano-production (temperature, air flow, humidity)?
- What production equipment is required?
- How to setup the building site?
Below lies the research question sandbox
How could nanorobots fix CO2 → C + O2?
How fast could nanorobots catch CO2 molecules from a normal atmosphere?
What energy is necessary to decompose a CO2 molecule?
What flux has to be transfered from the projector?
How could a nanorobot build CNM?
How exactly do plants grow?
What self-replication methods could be used?
What is the minimum frequency of self-replication to be effective?
- 1 nanorobot size ≈ 100 nm → area = 104 nm2
- 1m2 = 1014 nanorobots → 45 replication cycles
- 20' per cycle = 15 hours to cover 1m2 starting with 1 nanorobot
Bacteria can make reproduction look easy; can they also be instructed via specific light wavelengths?
- Yes.