Nanofiber spectral analysis

An apparatus, comprising:

• at least one sampling nanofiber formed into a sampling coil having a first sampling end and a second sampling end;
• at least one reference nanofiber formed into a reference coil having a first reference end and a second reference end;
• a pressure-tight chamber defined by an inner surface that is completely enclosed by an outer surface, the first and the second sampling ends disposed within the chamber, the sampling coil disposed outside the chamber;
• an energy source to direct energy to at least one of the first sampling end or the first reference end;
• and
• a receiver to receive at least one of the energy modified by evanescent interaction with a sampled material located within an inner diameter of the sampling coil or outside an outer diameter of the sampling coil, or the energy modified by propagation through the reference coil.

A system, comprising:

• at least one sampling nanofiber formed into a sampling coil having a first sampling end and a second sampling end;
• at least one reference nanofiber formed into a reference coil having a first reference end and a second reference end;
• a pressure-tight chamber defined by an inner surface that is completely enclosed by an outer surface, the first and the second sampling ends disposed within the chamber, the sampling coil disposed outside the chamber;
• an energy source to direct energy to at least one of the first sampling end or the first reference end;
• a receiver to receive at least one of the energy modified by evanescent interaction with a sampled material located within an inner diameter of the sampling coil or outside an outer diameter of the sampling coil, or the energy modified by propagation through the reference coil;
• and
• a downhole tool attached to the energy source, the receiver, and the chamber.

A method, comprising:

• transmitting energy to at least one of a first sampling end of a nanofiber sampling coil having a second sampling end, or a first reference end of a nanofiber reference coil having a second reference end;
• receiving at least one of the energy modified by evanescent interaction with a sampled material located within an inner diameter or outside of an outer diameter of the sampling coil, or the energy modified by propagation through the reference coil;
• and
• comparing the energy modified by evanescent interaction with the energy modified by propagation through the reference coil to determine a spectroscopic property of the sampled material.