In order to change density, TiO2 must be very fine nano-particles. In one other variant,
the copper conductor is replaced with a bare optical fiber or a crystal coil. What is a crystal coil? Possibly also glass, but crystalline. Provided that the Sun's spectrum also contains photons that eject other types of basic particles, including g− and p+. In this scheme of things photons are just basic particles accelerated to light speed.
Since, good conductor of electricity is often good conductor of heat, both e− and T+ particles are collected by a copper coil. We need to separate the two, so that the torus does not over heat.
Then there remain T− and g+...
T− when embedded imbue invisibility. The charges are immobile. What would collect and conduct T−?
g+ generate lifts. They embed into carbon fibers, but are also immobile.
To use an analogue to electrical conduction where p+ paired orbits with e− particles captured in the weak fields conducts e− and T+ particles;
g+ paired orbits with g− particles captured in the weak fields will conduct g− particles and p+ particles. And T+ paired orbits with T− particles captured in the weak fields will conduct T− particles and g+.
The first are metals, the second are crystals, and the last....? What have T+ paired orbits as its outermost nucleus layer? They are like elements being stripped of its outermost p+ paired orbits; bare nucleus, but stable. These could be the noble gases.
If so, a channel of noble gas, Neon Ne within the TiO2 suspension, can serve as a collector for these charges.
Have a nice day.