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X‐ray radiation is a leading cause of cancer, and thus a device that offers effective and real‐time radiation monitoring is of significant interest. The configuration design, fiber drawing, and device construction are introduced for a multimaterial fiber detector system that allows real‐time and remote X‐ray monitoring. A fiber detector embedded with metal–semiconductor–insulator ladder‐like configuration is designed and successfully constructed on the basis of Plateau–Rayleigh instability. The multimaterial design affords the detector robust radiation‐harvesting ability, enabling the collection of up to ≈88.13% of total X‐ray energy. The unique ladder‐like configuration allows the efficient generation and collection of free charges. Moreover, the detector exhibits excellent mechanical flexibility and can be woven into a complex configuration and even wearable fabrics. Finally, the application of the micro‐detector in real‐time wireless X‐ray monitoring is demonstrated. This research not only presents a flexible radiation detection strategy for various ionizing radiation types, such as X‐ray, gamma ray, and neutrons radiation, but also has potential uses in remote radiation monitoring in case a conventional rigid device is inapplicable. [ABSTRACT FROM AUTHOR]

In this paper, a flexible terahertz (THz) Metamaterial (MM) with high sensitivity is proposed for the detection of the pesticide imidacloprid. The MM sensor is composed of a polyimide (PI) substrate and a periodic aluminum (Al) split ring resonator array. The sensing performance of the MM is verified by both simulation and experiment. The simulation results show that the refractive index (RI) sensitivity of the proposed MM sensor is 220.7 GHz/RIU, and the figure of merit (FOM) of this MM is 1.52. Then, the sensing performance of the MM sensor is verified by using imidacloprid solutions with different concentrations. The experimental results show that the detection sensitivity of the MM sensor is 12.3 GHz/(mg/ml), and the limit of detection (LOD) is 0.0112 mg/ml. The THz MM sensor proposed in this paper is flexible, simple to make, cost-effective, highly sensitive and has a very broad application prospect in the concentration detection of pesticides such as imidacloprid. • The sensor has high refractive index sensitivity, concentration sensitivity and low detection limit. • The sensor is flexible and suitable for use in most cases. • The sensor material is cheap and easy to manufacture. • The shift of resonance peak under different structural parameters is analyzed. [ABSTRACT FROM AUTHOR]