What is the resistivity of the best-performing PANI studied?

• A. 0.002 Ω•cm
• B. 50 Ω•cm
• C. 200 Ω•cm
• D. 500 Ω•cm

Answer: (C)

The resistivity of the best-performing polyaniline (PANI) studied is 200 Ω•cm. This value is significant as it indicates the material's ability to conduct electricity; lower resistivity generally suggests better conductivity.

In the context of conducting materials, PANI has been researched extensively due to its potential applications in electronics, sensors, and other technological fields. The 200 Ω•cm resistivity reflects an optimized form of PANI, likely achieved through specific methods of synthesis or doping that enhance its conductive properties.

The other values listed (0.002, 50, and 500 Ω•cm) do not represent the best-performing resistivity of PANI but may pertain to other formulations or conditions under which PANI exhibits different levels of conductivity. For example, the very low resistivity of 0.002 Ω•cm would indicate extremely high conductivity, which is uncommon in organic conductors like PANI, while 500 Ω•cm suggests relatively poor conductivity compared to the optimal performance at 200 Ω•cm. Thus, recognizing that the best performance is closely tied to specific chemical treatments and structural modifications is essential in understanding the properties of conducting polymers like PANI.