Table: nanogenerators
Columns: material
type
geometry
output_voltage
output_power
synthesis
researched_at

Question: Where was d: ~50nm, l: ~600nm geometry researched?
SQL: SELECT "researched_at" FROM nanogenerators WHERE "geometry" = 'D: ~50nm, L: ~600nm'

Question: How many materials are there for output power of ~0.1 pw per cycle (calculated)?
SQL: SELECT COUNT("material") FROM nanogenerators WHERE "output_power" = '~0.1 pW per cycle (calculated)'

Question: What is the output power for the v p =~3 mv output voltage?
SQL: SELECT "output_power" FROM nanogenerators WHERE "output_voltage" = 'V P =~3 mV'

Question: How many synthesis are there for 5~16.2 pw per cycle (calculated) output power?
SQL: SELECT COUNT("synthesis") FROM nanogenerators WHERE "output_power" = '5~16.2 pW per cycle (calculated)'

Question: Where was d: ~100nm, l: 1 μm geometry researched?
SQL: SELECT "researched_at" FROM nanogenerators WHERE "geometry" = 'D: ~100nm, L: 1 μm'

Question: Where was d: 25~70nm, l: 10~20 μm geometry researched?
SQL: SELECT "researched_at" FROM nanogenerators WHERE "geometry" = 'D: 25~70nm, L: 10~20 μm'