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(a) Raman spectra of pyrolized neat and heavily I2-doped P. phalangioides silk fibers. (b) Temperature-dependent electronic transport of pyrolized neat (solid line) and I2-doped (dashed line) P. phalangioides silk fibers. Inset: log(R) versus (1/T)(1/4) fit, showing that the pyrolized silk fiber follows a variable range hopping (VRH) mechanism.
