Methods, systems, and devices for the self-detection and/or self-decontamination of chemical, biological, radiological, and/or nuclear hazards, threats, and contaminants. The self-detection system preferably uses aptamers functionalized to an electronic system to sense CBRN threats. The aptamers are functionalized directly to a conductive surface such as a noble metal coated fiber or other conductive fiber strand. The self-decontamination system is preferably in communication with the self-detection system and responds to the detection of a CBRN agent by switching to a decontamination state, such as becoming absorbent or releasing an anti-CBRN agent such that it can neutralize the threat. In a preferred embodiment, the system is worn by a user.
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