Real chips have been produced using several alternative computing technologies to silicon.
Sources
- Silicon is still King and it is proving difficult to topple it - IEEE Future Directions (cmte.ieee.org)
- https://news.mit.edu/2019/carbon-nanotube-transistor-computer-chip-ibm-analog-devices-0828 (news.mit.edu)
- https://ethw.org/The_GaAs_MESFET:_The_Basis_for_Modern_Wireless_Communications_Systems (ethw.org)
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