A voltage difference is detected in the “generator” part of individual water‐filled SWNTs when a current is applied on their “motor” part. It is suggested that the measured voltage difference reveals a newly induced electromotive force, which is generated by a water flow inside the SWNT. The water molecules in the nanotube channel are in turn dragged to flow by the current applied on the “motor” part.

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ZnO nanowires were synthesized by chemical vapour deposition (CVD). The dc electrical conductivity of a single ZnO nanowire was investigated over a wide temperature range from 300 to 6 K. It is found that the temperature dependence of conductivity follows the relation . The conductivity data suggest that the dominant conduction mechanism is Efros–Shklovskii variable-range hopping conduction. The strong electron–electron interaction in the nanowire is also proved by the I–V and d I/d V curves, on which there emerges a Coulomb gap-like structure at low temperatures.

Controlling the spin angular momentum of light (or circular polarization state) plays a crucial role in the modern photonic applications such as optical communication, circular dichroism spectroscopy, and quantum information processing. However, the conventional approaches to manipulate the spin of light require naturally occurring chiral or birefringent materials of bulky sizes due to the weak light-matter interactions. Here we experimentally demonstrate an approach to implement spin-selective transmission in the infrared region based on folded metasurfaces that are capable of transmitting one spin state of light while largely