Abstract: A method of producing a stabilized fiber, including performing a heat treatment on an acrylamide polymer fiber under an oxidizing atmosphere in a stabilization treatment temperature range of 200° C. to 500° C. while applying a tension of 0.07 mN/tex to 15 mN/tex.

Abstract: The carbon fiber precursor contains a crosslinked acrylamide-based polymer and has a gel fraction of 5% or more.

Abstract: The carbon fiber precursor fiber of the disclosure includes an acrylamide-based polymer fiber; and a self-crosslinked product of a self-crosslinking silicone oil on a surface of the acrylamide-based polymer fiber.

Abstract: A carbon fiber wherein an average fiber diameter of a single fiber is in a range of 3 to 10 ?m, and an average value of an intensity ratio (D/G) of a D peak to a G peak in a Raman spectrum in a cross section perpendicular to a fiber axis direction of the single fiber is 0.90 or less in a region inside a circle having a diameter of 1 ?m and centered at a center of gravity of the cross section of the single fiber, and is 0.90 or less in a region up to 1 ?m inside from an outer periphery of the cross section of the single fiber, wherein the D peak is observed at around 1360 cm?1 and derived from a defect in a graphite structure and the G peak is observed at around 1590 cm?1 and derived from the graphite structure.

Abstract: A carbon fiber precursor fiber bundle includes: acrylamide-based polymer fibers, wherein the carbon fiber precursor fiber bundle contains single fibers having a circular cross section in a proportion of 30 to 100%, wherein the circular cross section has a ratio of a major axis to a minor axis of 1.0 to 1.3 in a cross section orthogonal to a longitudinal direction of the single fiber, and a fineness of the single fiber is 0.1 to 7 dtex.

Abstract: A method of producing a stabilized fiber, including performing a heat treatment on an acrylamide polymer fiber under an oxidizing atmosphere in a stabilization treatment temperature range of 200° C. to 500° C. while applying a tension of 0.07 mN/tex to 15 mN/tex.

Abstract: A method for immobilizing microobject to a solid-phase material is provided. The method comprises a step of preparing the solid-phase material having on its surface an intermediate agent that includes a first element that is capable of interacting with at least the above microobject, and a microobject immobilizing step of immobilizing the microobject to the solid-phase material in a state in which the interaction of the intermediate agent is exhibited.

Abstract: A method for immobilizing microobject to a solid-phase material is provided. The method comprises a step of preparing the solid-phase material having on its surface an intermediate agent that includes a first element that is capable of interacting with at least the above microobject, and a microobject immobilizing step of immobilizing the microobject to the solid-phase material in a state in which the interaction of the intermediate agent is exhibited.